Restoring History – Protecting Our Future

“What use is a fine house if you haven’t got a tolerable planet to put it on?” – Thoreau

by Matt Grocoff, founder Greenovation.TV, contributor to The Environment Report on Public Radio, and the greenovation guru for Old House Web

The full article is available on OLD HOUSE WEB

When my wife Kelly and I bought our 110 year old Folk-Victorian home in Ann Arbor’s Old West Side Historic District, it was a dream come true: drafty old windows, lead paint, zero insulation, a half-century old furnace, asbestos siding, a gas powered mower in the shed and even a few pieces of coal scattered around the back yard. What more could a couple ask for?

From the start we knew that homes use an astonishing 22% of energy consumed in the U.S. In fact, your home uses far more energy than your car. Home energy costs have skyrocketed to an average of $2200 per year. Old homes use even more than their fair share of the energy pie. . . .

But using resources to build big new “green” homes to save resources just seems ironic. There are 130 million existing homes in the U.S.; half were built before 1972.

So, retrofitting America’s old homes is not just about preserving history, it is indeed about protecting our future.

READ MATT’S FULL ARTICLE AT OLD HOUSE WEB

And . . . here’s helpful resources you must explore before starting your Mission Zero:

One Block Off the Grid http://1bog.org/

Joolze.com http://www.joolze.com/

Transcript

Matt: [at front of old Victorian house] Hi, I’m Matt Grocoff, the green renovation expert for Old House Web and host of greenovation.tv and this is my house.  So when my wife Kelly and I first bought this 110 year old folk Victorian house, it was a dream come true: it had lead paint, asbestos siding, zero insulation and even an old gas powered lawn mower out in the shed.  What more can anybody ask for.

Matt: [in living room] So on move in day we brought two things with us:  a crowbar to rip up all the old carpet and a box of compact fluorescent light bulbs.  We replaced every light socket in this house with compact fluorescents and then we added motion sensors to every light switch in the house.  We leave a room, if we forget to turn it off, it turns it off for us.

Matt: [in bathroom] So at the start of our renovation project, this was the only bathroom in the house.  It was fantastic.  It had pink Formica tiles, an old flush toilet that flushed 5 gallons every time.  This is a Caroma Dual Flush Toilet which only uses .8 gallons every flush and unlike our old toilet never clogs.  But not only have we made it look great, but we’ve made it way more energy efficient.

This is a 1-minute a gallon showerhead.  This is going to use a gallon and a half a minute less than an ordinary showerhead.  This will literally save thousands of gallons over its lifetime.

Matt: [backyard drilling for geothermal] I can’t tell you how many times I’ve heard people say “I thought you couldn’t put geothermal into a historic house.”  Well this house proves that wrong.  We were able to put three 150-foot bore holes vertically into the back yard on a very small piece of property.  Not only do we have a heating and cooling system that uses half the energy of our neighbors, we have a house that’s a whole lot more comfortable.

Matt: [in living room] We’re out to prove that old houses can be the Greenest houses. In fact, with all the renovations we’ve done so far, we’ve made this house ultra efficient and we’ve got a ways to go.  We’re going to take this house all the way to Net Zero.  Meaning it’s going to produce more energy than it uses.

Matt: [at the computer] So you eco geeks, get ready to get geeked out because this is our WattVision Google Power Meter.  And this will tell us how much energy we’re consuming at any given moment.  If everyone knew how much energy they were using, they would probably use a lot less.  [I'm coming to get you, I got you, I got you] Before we get the solar panels up on the roof, you can see we’ve got a lot of work to do.

Matt: [pointing to house exterior] We’ve got to paint the house, restore these old windows, then top it off with some really energy efficient storm windows.  My daughter Jane will probably still be alive when this house turns 200 years old.  So restoring America’s old homes is not just about preserving history, it’s about protecting our future.   So for Old House Web, this is Matt Grocoff reminding you that, “The Green Revolution Begins at Home”

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200-year-old house undergoes massive green renovation.

After playing a colorful role in America’s early years, a Salem, Mass., house has made history again, thanks to a two-year renovation that resulted in its certification as one of the first LEED-certified National Historic Landmarks.

The federal-style house was built in 1811 for Joseph Story, the youngest person ever appointed to the Supreme Court, and it later served as home to the Vaughan family, whose members made significant contributions to early aviation and to Antarctic exploration as part of Admiral Richard Byrd’s 1928 South Pole expedition.  Read the full article at EcoHome

Learn more about this green remodel at www.greenremodeling.org

Learn about more historic green homes at www.OldHouseWeb.com

The Joseph Story House in Salem, Massachusetts - Credit: Wikimedia Commons CC 3.0

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Ready for some green bling?  Deciding to generate your own electricity with rooftop solar panels or a backyard wind turbine sounds exciting – not only are you doing good, but you could also save a wad of cash.  But remember our mantra at GreenovationTV:  Reduce, Reduce . . . Then Produce.

Now, if you’ve already sealed, insulated and squeezed out every possible negawatt of savings, it may be time to begin your quest for home grown clean energy.  Before you start calling installers it helps to know your home’s solar and wind energy potential.

Joolze.com is a free tool to help you find your renewable potential in seconds. Just type in your address and explore a wealth of information about your energy options. There are a lot of sites that tell you about the potential for solar energy in your neighborhood. However, no site does it quite like Joolze. They lay out both solar and wind estimates side-by-side so you can compare. Not only that, you can determine whether it is better to focus on energy efficiency, or to generating renewable energy.

With just your address and a few questions, that take seconds to answer, Joolze will tell you more than you ever knew about your home’s energy potential – Solar, Wind, Usage, and Utility programs. Suddenly, it is so much easier to make a change to how you use and purchase energy.

If you want to quickly find out your home’s wind or solar potential, or which energy efficiency projects to tackle first, check out www.Joolze.com right now, and get going!

Let the folks at Joolze know what you think and . . . have fun.

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via The White House

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Larry Laseter, president of Efficiency First Capitol Circle member Masco Home Services, joined Barack Obama in Savannah, Ga., on Tuesday as the President delivered a speech outlining details of the proposed HOME STAR efficiency retrofit program. Here is a video released by the White House that shows a brief behind-the-scenes conversation between Larry Laseter and President Obama:

“We’re in the business of doing this now, and just like the GOLD STAR program, we actually guarantee their first year of energy savings” Laseter told the President. “That’s the beauty of this, is we know these technologies are proven, and with this bill, it will jump-start thousands of jobs.”

via Efficiency First

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Builder groups in Indiana and Minnesota offer two different models for success for states with lagging efforts.
By: John Caulfield via EcoHome

After a slow start, the Indiana Builders Association in recent weeks has been “ramping up” its program to weatherize low-income housing and, in the process, create remodeling jobs. Builder-members participating in this effort are now weatherizing about 150 homes per week, and sometime this summer the HBA expects to meet its goal of weatherizing 3,300 units, says CEO Rick Wajda.

Indiana awarded the association $21 million of the $130 million the state received from what the federal government allocated for weatherization from the $787 billion American Recovery and Reinvestment Act of 2009. However, through Feb. 16, Indiana had completed just less than 5%—974 out of 19,736—of the housing units it plans to weatherize under this grant. And that’s nowhere near the worst performance among all states, according to a progress report on the Department of Energy’s (DOE) Weatherization Assistance Program, which went into effect a year ago.

CLICK HERE TO READ MORE

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Find other homes, or monitor your own, at www.Wattvision.com

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Listen to Matt’s story on The Environment Report syndicated on NPR stations nationwide.

We know that a hardware store sells hardware.  So, what in the world does a ReStore sell? . . . . It sells any kind of RE you can imagine: REducing, REusing, REcycling .

Habitat ReStores are retail outlets which help you restore your house for a fraction of the cost while helping out a great cause.  In addition to

Bathroom made with reused material from reuse centers: mirror, clawfoot tub, sink, marble floor, picture frame, moldings, plumbing parts, cabinets, antique doors and paint Photo by Dave Lewinski

raising funds for Habitat for Humanity, ReStores help the environment by keeping quality, usable materials out of landfills and putting them back into good use.

Materials sold by Habitat ReStores are usually donated from building supply stores, contractors, demolition crews or from individuals who want to support Habitat for Humanity and keep stuff out of landfills.

When our very own Dr. Anna Marie renovated her home in Florida, she donated all of the old cabinets and appliances to her local Habitat ReStore (watch the video).  When Kelly and I needed reclaimed brick for our patio, salvaged lumber for our moldings, antique doors and a claw foot tub for the new bathroom, an outdoor fireplace, plumbing supplies, and even tools, we found it all (and more) at the ReStore and saved tons of money.

Reuse centers like the ReStore can be found in virtually every community in North America (see below to find a store near you).  They are a green remodeler’s dream come true and a perfect way to reach the goal of zero waste.

You can literally build an entire house from materials from a reuse center.

You’ll typically save 50% – 90% by skipping the big box stores and finding what you need at a ReStore.  So, use fewer natural resources, keep good stuff out of landfills, help a charity and save a little money . . . You can’t beat that.

Check out The Story of Stuff if you’re not already convinced about reuse.  You’ll definitely want to check out all the cool stuff over at the great new website www.AltUse.com if you’re looking for alternative uses for stuff you’ve got laying around the house but can’t bring yourself to drop by the ReStore.

by Matt Grocoff

Related Links:

Habitat ReStore Directory – United States

Habitat ReStore Directory – Canada

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Vice President Biden Unveils Report Focused on Expanding Green Jobs And Energy Savings For Middle Class Families

WASHINGTON, D.C. – Vice President Biden unveiled Recovery Through Retrofit, a report that builds on the foundation laid in the Recovery Act to expand green job opportunities and boost energy savings by making homes more energy efficient.  Joining the Vice President today were Nancy Sutley, Chair of the White House Council on Environmental Quality; Steven Chu, Secretary of Energy; Hilda Solis, Secretary of Labor; Shaun Donovan, Secretary of Housing and Urban Development; and Karen Mills, Administrator of the Small Business Administration.

At a Middle Class Task Force meeting earlier this year, the Vice President asked the White House Council on Environmental Quality (CEQ) to develop a proposal for Federal action to lay the groundwork for a self-sustaining home energy efficiency retrofit industry. In response, CEQ facilitated a broad interagency process with the Office of the Vice President, eleven Departments and Agencies and six White House Offices to develop recommendations for how to use existing authority and funding to accomplish this goal.  These recommendations are described in detail in the Recovery Through Retrofit Report.

“Recovery Through Retrofit is a blueprint that will create good green jobs – jobs that can’t be outsourced, and jobs that will be the cornerstones of a 21st-Century economy,” said Vice President Biden. “And, thanks to the Recovery Act’s unprecedented investments in energy efficiency, we are making it easier for American families to retrofit their homes – helping them save money while reducing carbon emissions and creating a healthier environment for our families.”

“This report builds on the foundation laid in the Recovery Act to expand green job and business opportunities for the middle class while ensuring that the energy efficiency market will thrive for years to come,” said Nancy Sutley, Chair of the White House Council on Environmental Quality. “An aggressive program to retrofit American homes and businesses will create more work, more savings, and better health for middle class Americans.”

Existing techniques and technologies in energy efficiency retrofitting can reduce energy use by up to 40 percent per home and lower total associated greenhouse gas emissions by up to 160 million metric tons annually.  Retrofitting existing homes also has the potential to cut home energy bills by $21 billion annually.  Yet, despite the real energy cost savings and environmental benefits associated with improving home energy efficiency, a series of barriers have prevented a self-sustaining retrofit market from forming.  These barriers include a lack of access to information, financing and skilled workers.

The recommendations and actions in this Report have been carefully designed to help overcome these barriers and to leverage Recovery Act funding to help ensure that the energy efficiency market will thrive long after the Recovery Act money is fully spent.

Some recommendations in the report include:

• Provide American Homeowners with Straightforward and Reliable Home Energy Retrofit Information: Consumers need consistent, accessible, and trusted information that provides a reliable benchmark of energy efficiency and sound estimates of the costs and benefits of home energy retrofits.
• Reduce High Upfront Costs, Making Energy Retrofits More Accessible: Access to retrofit financing should be more transparent, more accessible, repayable over a longer time period, and more consumer-friendly.
• Establish National Workforce Certifications and Training Standards: A uniform set of national standards to qualify energy efficiency and retrofit workers and industry training providers will establish the foundation of consumer confidence that work will be completed correctly and produce the expected energy savings and benefits.  Such standards should incorporate healthy and environmentally friendly housing principles, as outlined in the report titled, the Surgeon General’s Call to Action To Promote Healthy Homes (2009).  Proper certification and training standards will ensure that retrofitted homes are healthy homes.  Consistent high-level national standards will spur the utilization of qualified training providers that offer career-track programs for people of all skill levels, promote and expand green jobs opportunities and facilitate the mobilization of a national home retrofit workforce.

To read the full report and recommendations, please go to http://www.whitehouse.gov/assets/documents/Recovery_Through_Retrofit_Final_Report.pdf

“As Secretary of Labor I’m working to help build the clean energy economy of tomorrow by investing in our workers today,” said Secretary Solis “Training for green jobs can empower workers to climb the career ladder, sustain a family and provide a secure retirement. Through Recovery through Retrofit, we’re committing to meet the needs of workers, employers and homeowners, so we can shape our clean energy future into one that supports working families and is inclusive of the diversity of our nation.”

“I am proud to join my colleagues today in announcing Recovery through Retrofit,” said Secretary Donovan. “It will allow us to work closely together to remove barriers to creating more energy efficient homes for American families.  This initiative will not only lead to cost savings for homeowners and reduce negative environmental impact, but will also be a powerful vehicle for economic recovery by creating quality middle class jobs and lasting neighborhood benefits. This is another demonstration of HUD’s commitment to creating jobs for the new economy in high growth industries by encouraging and investing in “green” building and energy retrofits.”

“This initiative will not only result in considerable cost savings for homeowners on their energy bills, but also put resources in the hands of green sector small businesses who will in turn create good-paying jobs in communities across the country,” said SBA Administrator Mills.

EPA Administrator Lisa Jackson, who was unable to attend this event due to travel added, “This is the Recovery Act at work.  Communities will benefit from good jobs, families will benefit from lower energy bills, and we will all benefit from reduced air pollution and a growing green economy. Our Energy Star program can help families cut up to 30% off their energy bills — saving the average household more than $700 a year through efficiency investments.  EPA is proud to be working with all of our partners to help people save money when they need it the most, and build a new foundation for prosperity through a growing green economy.”

The Department of Energy today also announced $454 million under the American Recovery and Reinvestment Act for energy efficiency efforts nationwide.
The Department is now accepting applications for a new $390 million “Retrofit Ramp-Up” program that will deploy innovative approaches to energy efficiency building retrofits. These Recovery Act funds will help create new partnerships to deliver energy bill savings to entire neighborhoods and towns.  Bringing energy retrofits to whole neighborhoods at a time will simplify the process for homeowners and significantly reduce costs. When applied on a national scale, the program could save billions of dollars annually in utility bills for households and businesses and create thousands of jobs across the country. In addition, the Energy Department announced $64 million in energy efficiency funding for cities, counties, and Indian tribes.

“The Retrofit Ramp-Up initiative is designed to slice through the barriers identified in this report – inconvenience, lack of information, and lack of financing – and to make energy efficiency easy and accessible to all,” said Secretary Chu.  “We want to make our communities more energy efficient, block by block, neighborhood by neighborhood — eventually expanding to entire cities and states.  We can literally bring energy efficiency to the doorsteps of the American people.”

Separately, the Department of Energy will accept state proposals to use State Energy Grant or Energy Efficiency Conservation Block Grant funds for Property Assessed Clean Energy (PACE) pilots.  This is an innovative model which allows communities to provide financing to homeowners to install renewable energy systems and retrofit buildings that can be paid off over time on their property tax bills.  Today, the White House is announcing a “Policy Framework for PACE Financing Programs” developed through an interagency process to ensure that effective homeowner and lender safeguards are included in PACE programs.

To read the framework, please go to http://www.whitehouse.gov/assets/documents/PACE_Principles.pdf

To ensure implementation of the Recovery Through Retrofit Report’s recommendations, CEQ will continue to convene an interagency Energy Retrofit Working Group which will be co-chaired by the Department of Energy, the Environmental Protection Agency, the Department of Housing and Urban Development, the Department of Labor, and the Department of Agriculture.

The group will track the progress of the Report’s recommendations, develop additional strategies to support expansion of the retrofit market, including recommendations for rental housing, and operate as the single point of contact for the implementation of this effort.   Within thirty days, the group will submit an implementation plan to the Vice President.  Moreover, the group will report to the Vice President regularly on its progress toward implementing each of the recommendations identified in the Report.

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by Jennifer Eschelbach, EnHouse – GreenovationTV Contributing Writer

When it comes to improving the efficiency of your windows, replacement is helpful but is not always the most cost effective solution.  Replacement windows can cost between $500 per window for cheap (and worthless) vinyl to $1,000 per window for high end (and far more efficient) Pella or Anderson brands.

Several simple remedies can help improve the efficiency and comfort level in your home. Windows were originally designed to look good while letting in the light and the view. But old windows are lousy at keeping your home cozy. Please don’t fret . . . there are easy ways to improve the efficiency of your existing windows.

If you’ve got really old windows with sash weights, watch this video from This Old House to learn how to use a “spring balance” to replace that sash weight and leave room to add insulation in your window cavity.

In the meantime, check out these ridiculously easy and cheap solutions to make your windows a little more friendly this winter.

Solution #1: Window Treatments:  Cost $0 (if you use your existing shades)

Window treatments are one of the cheapest ways to modestly improve efficiency.  Keeping shades open can reduce the need for artificial lighting.  But window dressings can also be used to reduce heat loss in the winter (at night), and heat gain in the summer (during the day).

Common energy-saving window treatments include interior blinds, draperies and shades. Interior blinds, either either horizontal or vertical, are a good choice because the slats can be used to control light and ventilation. However, this option is most effective in the summer months for reducing heat gain.

Draperies are effective during heating and cooling seasons, though their effectiveness is dependent on color and fabric. During the summer months, drapes should remain closed during the day to prevent heat gain. In the winter months, close all of your drapes at night.  During the day, close any drapes that don’t receive any daylight to reduce heat loss. According to the U.S. Department of Energy, closing drapes during cold months can reduce heat loss in a room by up to 10%.

Shades are another valuable tool to combat both heat loss and heat gain. In the summer, lower shades on sunlit windows to reduce heat gain, and in the winter raise shades on the south side of the house during the day and lower them all at night. Dual shades which have one highly reflective side and one absorbing side, are extremely effective, because they can be reversed with the seasons. The reflective side should always face the warmest side, out during the summer and in during the winter. Utilizing window treatments is a good first step toward maximizing the efficiency of your windows.

Solution #2: Caulk: Cost $5

Products such as caulk, rope caulk and window insulation kits may also improve efficiency. Use caulk and rope caulk to seal air leaks in and around windows. Caulk is a lasting solution for sealing cracks and gaps that are about one-quarter-inch wide.

For a more flexible remedy, rope caulk can be applied in the winter and easily removed in the summer. Rope caulk can be used to seal airflow in window tracks, seals and any other drafty spots.

You can easily add some insulation to old windows that have sash weights.  Check out this video from This Old House to find out how.

Solution #3: Insulation Kits: Cost $11.99

Finally, you can add a second layer of glazing to the inside of your windows with a plastic window insulation kit. By adding a buffer against drafts and extra sill air space you can cut down on heat loss and boost your home’s ability to hold heat. If installed and removed carefully, window insulation kits can be reused for several years.

Windows add to the character and appeal of a space. Replacing them can be costly and unnecessary. Before deciding to invest in replacement windows, try these tips to improve efficiency. Consider what the payback might be for replacing windows, and make an informed decision.

WHERE TO BUY:

Insulating shades:

Rope Caulk:

Window Insulation Kits:

Jennifer Eschelbach is a GreenovationTV Contributing Writer and in charge of outreach for the The Environmental House Energy & Green Building Resource Center (EnHouse) in Ann Arbor, Michigan.  The EnHouse is a comprehensive resource and touring facility dedicated to furthering the causes of green building, energy efficiency and renewable energy. Jennifer is currently working on her second bachelors degree from Eastern Michigan University in Urban and Regional Planning.  She loves the smell of energy efficiency in the morning.

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CAMBRIDGE, MA – October 15, 2009

The declines in owner spending on home improvements will moderate through the end of 2009 and first half of 2010 according to the Leading Indicator of Remodeling Activity (LIRA), released today by the Remodeling Futures Program at the Joint Center for Housing Studies of Harvard University. The indicator suggests the remodeling industry is turning a corner. Annual spending levels should start to rise in the beginning of next year causing year over year declines to shrink to 8.9 percent by the second quarter of 2010.

“Remodeling spending by homeowners shows early signs of stabilization,” says Nicolas P. Retsinas, director of the Joint Center for Housing Studies. “While the housing recovery has been erratic, a strengthening economy could produce spending increases on home improvement projects by the second quarter of next year.”

Some positive signs for the industry are emerging. “Favorable financing costs – for those households with access to credit – and a pickup in homes sales are producing more opportunities for home improvement projects,” says Kermit Baker, director of the Remodeling Futures Program at the Joint Center for Housing Studies. Several factors, however, still impede remodeling growth. “A generally weak housing market with unstable prices, near record levels of foreclosures, and other distressed sales are discouraging households from undertaking nonessential remodeling projects.”

The Leading Indicator of Remodeling Activity (LIRA) is designed to estimate national homeowner spending on improvements for the current quarter and subsequent three quarters. The indicator, measured as an annual rate-of-change of its components, provides a short-term outlook of homeowner remodeling activity and is intended to help identify future turning points in the business cycle of the home improvement industry. The development of the LIRA is detailed in “Developing a Leading Indicator for the Remodeling Industry” (JCHS Research Note N07-1). In July 2008, the LIRA was re-benchmarked due to changes in the underlying reference series. These changes are explained in “Addendum to Research Note N07-1: Re-Benchmarking the Leading Indicator of Remodeling Activity” (JCHS Research Note N08-1). The LIRA is released by the Remodeling Futures Program at the Joint Center for Housing Studies of Harvard University in the third week after each quarter’s closing. The next LIRA release date is January 21, 2010.

The Remodeling Futures Program, initiated by the Joint Center for Housing Studies in 1995, is a comprehensive study of the factors influencing the growth and changing characteristics of housing renovation and repair activity in the United States. The Program seeks to produce a better understanding of the home improvement industry and its relationship to the broader residential construction industry.

The Joint Center for Housing Studies is Harvard University’s center for information and research on housing in the United States. Established in 1959, it is a collaborative unit affiliated with the Graduate School of Design and the Harvard Kennedy School. The Joint Center analyzes the dynamic relationships between housing markets and economic, demographic, and social trends, providing leaders in government, business, and the non-profit sector with the knowledge needed to develop effective policies and strategies. For more information, please visit www.jchs.harvard.edu.

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Listen to our Greenovation segment on the Environment Report on NPR

Even as the ice cream melts on your countertop and the fire hydrants are whistling for the dogs, there is a way to keep your house cool without using your air conditioner.  Stick a big ass fan in your attic.  A whole-house fan can save you some serious money and still keep you comfortable.

So you’re turning in for the night and the thermostat reads 80 degrees.  But the outside temperature has dropped to 68.  You’re just throwing money away if you turn on the a/c just to cool your house to 72.

Why use a whole house fan?

A whole house fan is a simple and inexpensive method of cooling your house. The fan draws cool outdoor air inside through open windows and exhausts hot indoor air through the attic to the outside.  Running a whole house fan whenever outdoor temperatures are lower than indoor temperatures will cool your house.

In summer, the air inside a home is heated during the hot part of the day. During the morning, late evening, and night, the outside air is often cooler and can be used to replace the inside air.  As daytime temperatures rise, the whole house fan can be turned off.

What are the benefits?

A whole house fan can be used as the sole means of cooling or to reduce the need for air conditioning. If both methods of cooling are present, seasonal use of the whole house fan (during spring and fall) may yield the optimum combination of comfort and cost.

Costs less to buy

• Purchase cost for a whole house fan = $150 – $650
• Purchase cost for a window unit a/c = $250 – $800
• Purchase cost of central a/c = $2,500 – $7,000

Costs less to operate

You lose money every time you turn on the a/c when you can bring in cooler outside temperatures for practically free.

• Central a/c = $0.15 – $0.43 per hour
• Window a/c = $0.18 – $0.52 per hour
• Whole house fan = a penny to a nickel per hour

Drawbacks

A whole house fan does a great job of bringing in cool outside air.  But, it can also bring in humidity, dust and pollen (and of course the smell of your friendly neighborhood skunk – but that’s how you know your fan is working) .  If you suffer from allergies, you can install allergy screens in your windows and still benefit from a whole house fan.

Selecting a whole house fan

• FAN SPEED. A two-speed fan permits the entire house to be ventilated quickly on high speed (such as when the occupants first arrive at home) and then provides gentle air circulation at the lower, quieter speed. A variable speed unit offers more flexibility in selecting the desired air movement.

• CONTROL OPTIONS. Control may be a simple on/off pull or wall switch, a multi-speed rotary wall switch, or a timer that automatically shuts off the fan at pre-selected time intervals.

• LOUVERS. Dampers or louvers typically operate automatically whenever the fan is on. Motorized dampers are available but are not necessary if the louvers are correctly installed and maintained.

• MOTOR MOUNTS AND NOISE. A direct drive unit has its fan blades attached directly to the motor shaft. This type of unit is usually less expensive to buy and operates at a higher speed than its belt-driven counterpart. A belt-driven unit typically features a motor driving a slowermoving, larger-diameter fan with four or more blades. It may be quieter, but will require maintenance of the pulley and belt.

Sizing a whole house fan

Determining the amount of airflow in cubic feet per minute (cfm) that the whole house fan should provide involves a simple calculation. Multiply the total gross square footage of the house (include upstairs area) by the ceiling height (typically 8 feet). Select a fan that delivers between one-half to one time that amount of cfm at 0.1″ static pressure. For example, a 25′ x 40′ one-story home is 1,000 square feet and would need an 8 x 1,000 x 1/2 = 4,000 cfm fan or better. A two-speed unit that delivers 4,500 cfm at the high setting (240 watts) and 3,200 cfm at low (120 watts) should be adequate.

Whole House Fan Installation – Do It Yourself

USE “H” BRACKETS TO PROVIDE PROPER SUPPORT. When installing a whole house fan, be sure to provide proper support and seal the unit into the rough opening in the ceiling. Never cut a truss chord; wooden “H” brackets installed between the trusses create a framed box to raise the fan above the truss system. The louvers must be able to open and close freely and care must be taken to prevent binding or misalignment. A fan with a 34″ base (30″ blade) will work with the dimensions shown in the diagram at left.

BUILD AN ATTIC-SIDE BOX COVER. A typical whole house fan has a 30″ diameter blade with a sheet metal cowling of 31″ to allow for blade clearance. An attic-side box cover may be constructed from a 4′ x 4′ piece of 1″ rigid fiberglass duct board. The box will be 33″ square with 1″ thick walls (inside dimension of 31″ x 31″). It will be 61/2″ deep. Adjust dimensions to actual fan size.

Note:  For a bit more money, you can find models with motorized automatic insulated doors to provide an air tight seal between the attic and living area when the unit is not in operation.

TIPS AND CONCERNS

Seal penetrations and vent attic.  Caulk all penetrations between the attic and living space, such as electrical boxes for ceiling light fixtures, loose attic hatches, large cutouts for plumbing vents, exposed beams, and recessed lights. A whole house fan creates a positive pressure in the attic; it is important that air from the attic is not forced back into the living space through cracks and gaps.

A guideline for sufficient attic vent area is one square foot of net-free vent area per 750 cfm of fan airflow. Continuous ridge and soffit vents are usually more than adequate. Vents with insect screens may have a net-free area equivalent to one-half of the total open area, depending upon the size of the holes in the screen area. Insulation should be installed directly against the fan box frame. Blown-in insulation may require the sides of the fan box to be raised (with baffles) to prevent interference.

AVOID BACKDRAFTS. Care should be taken to avoid backdrafting combustion appliances that are installed in the conditioned space. It is strongly recommended that combustion appliances NOT be installed in such a manner that they use room air for combustion. A whole house fan is capable of pulling large quantities of air from the home and, particularly if not enough windows are open, may easily backdraft a water heater located inside a louvered closet door.

Whole House Fan (PDF: 236k)

Click here to find where to buy a whole house fan

Article adapted from the Oak Ridge National Laboratory, U.S. Department of Energy, Building Technologies Program. and Southface Energy Institute

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