8 Easy Projects for Instant Home Energy Savings

It’s easier than you might think to reduce energy consumption and reduce your carbon footprint. These eight simple home energy projects are easy enough to do yourself, and pay for themselves quickly in instant energy savings.
By Gary Reysa
February/March 2008

If you have an electric (not gas) dryer, try a filter to vent the dryer indoors and take advantage of the waste heat.
GARY REYSA
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Reducing your home energy use is the best of win-win deals — not only does it reduce your carbon footprint, it also saves you big bucks on your energy bills. That’s especially exciting when you consider that many home energy improvements are fast, easy and inexpensive. Often, the savings from an individual project are small, but when you start putting them together they add up quickly.

My family set a goal of cutting our total energy use, energy costs and greenhouse gas emissions in half, and we were able to meet that goal with the help of these simple home projects. We found these reductions in our energy use easy to accomplish without making any significant lifestyle changes.

Here are the details: We cut our total energy use from 93,000 kilowatt hours (kWh) per year to 38,000 kWh per year. This is saving us $4,500 per year in energy costs, and has reduced our carbon dioxide (CO2) emissions by 17 tons! Our rate of return on the money we invested in this program is more than 50 percent — tax free.

Altogether, we took on 22 different projects, including two solar heating efforts that have already appeared in MOTHER EARTH NEWS. (See Build a Simple Solar Heater, December 2006/January 2007, and Solar Heating Plan for Any Home, December 2007/January 2008.) You can find details about all the projects we’ve done at our home in Montana on my website, Build It Solar. But those I’ll explain in the following pages are the fast, simple ones. These eight easy home improvement projects cost us about $400 and will save us at least $9,000 over the next 10 years!

Prioritizing the Projects

When you start looking at any group of energy saving projects, you’ll likely find a huge difference in the bang for the buck. In our case, it was the simple things — such as controlling the amount of power that our computers use or basic insulating projects — that had especially good paybacks. On the other end of the spectrum, the solar photovoltaic project we intend to do in the future will cost as much as all 22 of our other projects put together, yet will only account for 2.5 percent of the total energy reduction!

Why was the total payback on our projects so good? The keys to our success were:

  • We did quite a bit of homework before we got started. We evaluated each project for what it would cost and what it would save, and threw out the ones that wouldn't pay well.
  • Some projects cost almost nothing, but have big savings — you can see on the chart above that several paid for themselves many times over within the first year. These tend to bring up the average return of the overall effort.
  • We are do-it-yourselfers — this can make a huge difference in the costs involved in some projects.
  • Another bonus is that some of our energy improvements qualified for rebates or tax credits that further increased the money we saved.

Electricity and Greenhouse Gas

There’s another reason to do these projects. Cutting down on electricity use is very effective in reducing greenhouse gas emissions. Unfortunately, in the United States, most of our electricity comes from inefficient coal plants. Coal is a high carbon fuel, and compared to other energy sources, coal-fired plants produce a lot of carbon dioxide relative to the amount of energy they produce.

If we’re concerned about climate change, we should be shutting down coal plants. Instead we are on course to build more of them — many more. To me, this argues for doing an especially aggressive job of trimming your electricity use. If you want to reduce your contribution to greenhouse gases, most people will be able to find many hundreds of kilowatt hours that can be saved easily and cheaply with minimal lifestyle change. We get our electricity from a coal-fired plant, so all the projects we did significantly reduced the amount of greenhouse gas we produce. Notice that the projects that save electricity reduce greenhouse gases by about 2 pounds of carbon dioxide per 1 kWh of energy saved. For example, putting our two home computers on a power diet saved nearly 1,800 kWh per year and 3,500 pounds of greenhouse gas! 

1. Personal Computer Power Management

Computers and all their related equipment, such as printers and wireless routers, consume a lot of power. Together, our two computers and related equipment used 270 watts whenever they were switched on, but we found there was an easy way to reduce this amount. We put all the computer junk on a power strip, so that at night we could turn off everything with one flip of the power strip switch. We also started using the energy saving settings on our computers. During the day, we have the computers set to hibernate if they are inactive for 15 minutes so that the computer stops consuming power. This saves a total of 1,780 kWh per year, 3,560 pounds of greenhouse gas, and $178 per year! Recently, we also started using a new gadget called the Mini Power Minder that automatically powers down all our peripherals when the computer goes into hibernate. At only $15, it’s a bargain.

Energy savings/year: 1,779 kWh
Initial cost: $20
DIY labor: 1 hour
CO2 reduction: 3,557 pounds
Money saved/year: $178
Energy source: Electricity
1st year return: 890 percent
10 year savings: $2,834

2. Install Compact Fluorescent Light Bulbs Throughout the House

We decided to replace all of our existing incandescent lights with compact fluorescent light bulbs (CFLs). There is a much larger variety of CFLs out there now than there were just a few years ago. You can find them for most situations, including for lights with dimmer switches and decorative bulbs. We spent about $50 on new light bulbs, after you factor in some rebates from our utility. Many utilities offer rebates on CFLs, so check to see whether yours does.

Energy savings/year: 1,168 kWh
Initial cost: $50
DIY labor: 2 hours
CO2 reduction: 2,336 pounds
Money saved/year: $117
Energy source: Electricity
1st year return: 234 percent
10 year savings: $1,861

3. Seal and Insulate Heating Ducts

We sealed the exposed heating duct joints with duct mastic and insulated all the ducts that were not already insulated in the attic and the crawl space. That wasn’t many in my case, but it’s still worth doing.

The cost for sealing ducts is minimal — a can of duct mastic costs about $5. The cost for insulating ducts is also low — about 25 cents per linear foot of typical ducting. I figured it cost about $20 total, because most of my ducts were already insulated.

Unless you pay to have the ducts tested professionally before and after you insulate them, estimating the savings is a guess at best. Good sources say that duct losses are typically high — 15 percent to 30 percent on average of your heated air from the furnace is lost through cracks and openings at the duct joints. But in general, you can’t get at a lot of the ducting that runs through walls on an existing house. I focused my efforts on the ones I could get to in the attic, crawl space and basement.

I estimated the fuel savings for my house at a conservative 3 percent. However, a man I know who has sealed many duct systems and then measured them says he can get measured leakages down to 5 percent. In other words, this project made sense for my home, but it might save you much more than the figures listed below, depending on how well sealed your home already is. Just put it on your list of “must do” things. It may or may not bring you huge savings, but it’s easy and cheap to do.

Energy savings/year: 940 kWh
Initial cost: $20
DIY labor: 4 hours
CO2 reduction: 479 pounds
Money saved/year: $75
Energy source: Propane
1st year return: 375 percent
10 year savings: $1,195

4. Reduce Infiltration Losses (Seal Your Home’s Air Leaks)

Most homes have many places where air leaks in and out, including around doors and windows, but especially around plumbing, wiring and light fixtures that penetrate into the attic or crawl space. We decided to caulk around all the windows, and seal wiring and plumbing penetrations from the living space to the attic. For this project, I bought a few tubes of caulking and some polyurethane foam in cans, which cost a total of about $50.

You can find the obvious air leaks yourself because you’ll feel the drafts, but you might be surprised at some of the places your home is losing heat. The best way to find these spots is through a professional inspection, including a blower door test. If your utility offers this service, you should definitely take advantage of it. Then take every opportunity during the test to identify infiltration locations, so you can fix them later.

Again, the savings for this project are hard to estimate unless you’re willing to pay for a professional test. I guessed that infiltration was cut down by 0.1 ACH (Air Change per Hour). This would amount to about 10 percent air leak reduction on a typical house having a 1.0 ACH, or 20 percent on a well built and tight new house.

I estimate this reduction would be equal to 6,100,000 Btu/year, which is equivalent to 73 gallons of propane burned in a 90 percent efficient furnace, or 1,980 kWh. Again, the cost is so low and the potential savings are so high that this project is a must-do.

Energy savings/year: 1,980 kWh
Initial cost: $50
DIY labor: 8 hours
CO2 reduction: 1,009 pounds
Money saved/year: $156
Energy source: Propane
1st year return: 312 percent
10 year savings: $2,485

 5. Vent Dryer Inside During Winter

We have started to route the clothes dryer heat vent to the inside of the house in the winter. We live in a very dry climate, so the added moisture is a benefit, not a problem. There are two major advantages of venting inside. First, you recover the heat that was added to dry the clothes (about 2.2 kWh per load). Second, you avoid bringing in cold outside air to make up for the air that the dryer is pushing outside. To vent to the inside, you need to have a dry climate, an electric (not gas) dryer, and a way to catch the lint in the dryer exit stream. The cost of this project was $20 for some tubing and a lint filter.

Caution: Gas dryers should never be vented inside, since toxic combustion products are in the vented air. Electric dryers should only be vented inside if your climate is dry — be alert for any moisture problems.

Energy savings/year: 630 kWh
Initial cost: $5 to $20
DIY labor: 2 hours
CO2 reduction: 286 pounds
Money saved/year: $63
Energy source: Propane
1st year return: 315 percent
10 year savings: $1,002

6. Insulate Windows with Bubble Wrap

This is a neat idea that comes from the greenhouse crowd. You can insulate windows using bubble wrap packing material by spraying a water mist on the window, and then applying bubble wrap. The bubble wrap will usually stay in place for the full season with one spray. The bubble wrap distorts the view, but does allow good daylight to come through. It’s a good option for windows that you don’t need a view out of.

This is very cost effective — payback is usually less than one heating season. At the end of winter, you can just pull the bubble wrap off, roll it up and save it for next year. If you are going to use a lot of bubble wrap, it’s worth finding a dealer in packing materials to buy it from (or a greenhouse supply place). You can get bubble wrap from shipping companies such as UPS, but their prices are much higher.

My cost was 27 cents per square foot for 141 square feet, for a total of $38. This is something you can do in a couple hours, and use until you decide on a longer term solution — if ever.

Energy savings/year: 955 kWh
Initial cost: $38
DIY labor: 1 hour
CO2 reduction: 487 pounds
Money saved/year: $75
Energy source: Propane
1st year return: 197 percent
10 year savings: $1,195

7. Eliminate Phantom Electrical Loads

I suggest we lobby our representatives in Congress to have all electrical devices labeled with the amount of power they use when they are switched “off.” These phantom loads are relatively small, but they add up to considerable wasted electricity. For now, the easiest way to find out how much power your appliances and gadgets consume even when they’re “off” is with an inexpensive meter, such as the Kill-A-Watt. You plug the Kill-A-Watt into the wall, and then plug the device into the Kill-A-Watt. The meter measures power use and keeps totals for the time it’s plugged in. Other brands work similarly — WattsUp is another.

In my home, all the phantom loads added up to a total of about 80 watts of power. That’s 700 kWh per year! With power strips, you can completely turn off everything plugged into them by turning off the power strip. I used power strips to eliminate 20 of the 80 watts, and that is what I show below. The remaining 60 watts is my fancy Dish HDTV receiver that always uses 60 watts. Turning it off has no effect on its power consumption whatsoever! The only cost of this project was a couple of power strips — about $20. I spent another $50 upgrading my satellite receiver. It still consumes power when it’s off, but only about 15 watts instead of 60.

Energy savings/year: 569 kWh
Initial cost: $70
DIY labor: 4 hours
CO2 reduction: 1,137 pounds
Money saved/year: $57
Energy source: Electricity
1st year return: 81 percent
10 year savings: $907

8. Use Electric Mattress Pads

Unlike electric blankets, the power consumption for mattress pad heaters is very low (about 0.15 kWh per night). By using these electric mattress pads to heat the bed, we’re able to keep the temperature of the rest of the house much lower and still be comfortable. We have two furnaces in the house, but since putting in the electric mattress pad heaters, we have been able to turn off the furnace that heats the bedrooms. The savings in propane is considerable, and the comfort is outstanding.

Others have reported being able to do the same thing with good down comforters and the like, but we’ve tried that and it doesn’t work nearly as well for me. The mattress pad heaters vary in price, but ours was $125. The dollar savings were $186 per year.

Energy savings/year: 2,320 kWh
Initial cost: $125
DIY labor: 0 hours
CO2 reduction: 1,150 pounds
Money saved/year: $186
Energy source: Propane
1st year return: 148 percent
10 year savings: $2,963

(All calculations on 10-year savings are based on an estimated 10 percent increase per year in the cost of energy.)


Plan Your Own Projects

When we started our series of energy improvement projects, our goal was to cut our power usage and greenhouse gas emissions in half. We’re amazed at how easy it was and how much money we saved. But houses and living situations differ, so if you’d like to tackle your own half plan, you may need to choose a different list of projects. Here are some tips for getting started.

1. Make a full list of projects to reduce your energy use.

Build a big list of candidates to choose from. You can find the list of all the projects we did at Build It Solar. These are some other helpful resources:

Energy Savers Guide
Home Energy Saver 
Energy Star 
Rocky Mountain Institute 

2. Don’t do projects that aren’t feasible for your residence or situation.

Some projects will be impossible for your home or situation — throw these out. You might want to put some projects that look like a big stretch on a separate list to be looked at later.

3. Evaluate each project — estimate the cost, energy savings and greenhouse gas reduction.

For each project on your list, see if you can come up with at least a rough idea of what it would cost and what kind of energy savings it would achieve. In the project descriptions for everything we did, I’ve included how we estimated the cost, energy savings and greenhouse gas reduction — Build It Solar may be helpful for similar projects.

4. Make a master list of projects that you intend to do over time.

Using the results of your evaluations from Step 3, weed out the projects that don’t seem worth it. This should leave you with a good list of projects that make sense for your situation, economics and the planet.

5. Sequence the projects. Put them in the order you want to do them.

All things being equal, you might as well do the projects that save the most first. But there are other factors to consider, such as the fact that some projects may interfere with others if done too early. For example, it’s hard to seal up the electrical and plumbing penetrations from the living space into the attic if you have to wade through the 18 inches of loose fill insulation that you just added. Also, your budget may require putting off some of the pricey projects until later, or you might just be more interested in some projects than others.

6. Do them! Have fun and keep track of your progress. Be proud of the results.

Keep your utility bills so you can see what progress you are making. The bills will also be helpful if you sell the house to show its improved energy efficiency.

Here are a few other resources to keep in mind. If you are doing the insulating and weatherizing projects yourself, then Insulate and Weatherize by Bruce Harley is well worth the price. There are also some helpful how-to guides and plans for home energy conservation and renewable energy projects.


Gary Reysa is an accomplished do-it-yourselfer who has tackled dozens of home energy projects, large and small. This article is adapted from material on his website, Build It Solar, where you can find many more projects.


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Post a comment below.

 

Gary Reysa
9/3/2012 2:56:52 PM
Hi Vincent -- There are lots of them out there. If you go to Amazon and search for "heated mattress pad" several are listed. We use a Westpoint Stevens and its still going strong after several years. We have added them to all the bedrooms. Gary

Gary Reysa
9/3/2012 2:53:26 PM
Hi Bruce -- The ten year savings include a 10% per year fuel cost increase -- you can ramp that down if you think its too high. The saving on the two computers AND all peripherals was done very carefully (took half a day) with a KillAWatt -- your results may vary and computers are getting better, but the savings is well worth while. Certainly agree that using a clothes line instead of a dryer is a big saving -- about 900 KWH a year for a family according to a CA study. The main idea of the article was to point out how a few well chosen (for your situation) ideas can save a lot of energy and offer a very high return. The main thing is to have a plan to select the ideas that will work best for you: http://www.builditsolar.com/References/Half/Half.htm Thanks Gary

Vincent West
9/1/2012 8:31:00 PM
The information I would have liked to see in this article is where to get heated mattress pads for AC systems. I've seen many for DC systems, but I live in a standard apartment and I'm pretty sure my landlord doesn't want me to rewire the place. I could set up a transformer, but that's pretty lossy. Probably still better than turning up the heat, but I'd rather just be able to plug it in and turn all that electricity into heat for my bed, rather than using some of it to heat the unused space under my bed.

Bruce
5/2/2012 9:16:12 PM
Hmmm - the math doesn't seem to work re: yearly savings and 10 year savings? Some of these savings seem very large as well - 2 computers for example. Now that it's been a couple of years, can you please confirm the savings. Some aditional savings could include turning down the temp on the water heater, using a clothes line all year (hang in garage on wet days), motion sensors on light switches to turn lights off after the kids leave the room, low flow shower heads (less hot water = water heater savings)... got these ideas and a few more from www.greenterrafirma.com

Dave F._2
12/24/2010 12:55:03 PM
One thing that the author missed that is easy and also has huge energy savings is outdoor lighting. Most outdoor lights waste anywhere from 25 to 40% of their light by allowing it spill UP into the night sky. This is incredibly wasteful. Fully shielded lights that direct light downward to where it needs to light are FAR better at lighting, while using less light to do it. The additional benefits of this are increased security (due to the light being placed where it needs to be) and better seeing at night (due to less glare). I recently went to a home improvement store and of the hundred or so lights was appalled to find only TWO that fully shielded the light and directed it downwards. But there are sites out there which sell these lights, and they are comparable in cost to other new lights. So when putting these in, you can use a lower wattage bulb (saving money over time) for a similar up-front cost for the fixture. One last additional benefit: You'll see more stars at night, because you won't be contributing to light pollution. And if you have nearby neighbors, you won't be committing light trespass by having your light spill onto their property (perhaps forcing them to put up shades/blinds to block it). Easy project; big rewards.

Marc Cyr
9/27/2010 5:33:50 PM
I mocified a five gallon kerosene water heater that was no lomger in use. Now it is warming 55 degree F. water from the city water works. The recycled heater now gets 135 degree air blown through by a woodstove made in Virgina. Now uses wood fuel instead of kerosene to send warm water through the cold water supply pipe of my electric water heater. The stove is EPA certified and as long as there is city water pressure you can have a hot shower during a power outage using the wood heater. The gap between the top of the firebox and the water tank can be adjusted to maintain a safe water temperature without boiling so no circulator pumps are needed. I burn wood for at least six months per year. There is still enough room on top of the woodstove for a coffee pot during power outages.

gardener_3
8/22/2010 12:17:18 AM
Great except for electric mattress pad heater. I bought one and very soon started to feel fatigued every morning. Turns out it had magnetized the steel bed springs. Moving a hikers compass from head of bed to foot caused the needle to gyrate. I took the electric pad off and used a plug in bulk demagnetizer from Radio shack to demagnetize the springs by running it from head to foot of bed. Had to do it 10 times to cover the full surface of the bed. Re-checking with compass now showed no gyration and I no longer felt fatigued. Plan to get a futon(no metal springs) so I can put the mattress pad back on.

Jim Z._2
8/20/2010 11:38:20 AM
Over the years we have (Colorado): 1. replaced older furnace, 2. installed double-pane windows/glass doors, 3. replaced all bulbs with cfl, 4. blown insulation into roof, 5. replaced refrigerator, 6. bought front-loader clothes washer, 7. we drip-dry all clothes, 8. installed insulated glass door drapes, 9. installed openig clerestory windows (thus no AC needed in summer), 10. installed programmable thermostat, and 11. replaced roof w/ lighter-color shingles. Our monthly public service bill is slightly less than it was 23 years ago, yet we added a 1,000 s.f. pop-up to the house 14 yrs. ago (the addition was built w/ 2x6 studs for more insul.).

Mary_4
4/3/2010 6:48:21 AM
We bought a front loader washer/dryer set a couple months ago and have already noticed a savings of about $10.00 a month on our electric bill. We are also looking at installing a new hybrid electric water heater that uses a heat pump system. The manufacturer claims a regular electric water heater costs about $550 per year to operate while the hybrid is about $234 plus it recovers faster and has a 10 year warranty. We will be tearing an old shed down this summer (offering the old wood on freecycle.org so it doesn't go to the landfill) and building a new one incorporating some recycled windows. We are using opaque fiberglass panels for the roof and are going to take a crack at installing a solar panel to operate a small pump in our cistern next to the shed that irrigates our garden.

Mary_4
4/3/2010 6:45:48 AM
We bought front loader washer/dryer set a couple months ago and have already noticed a savings of about $10.00 a month on our electric bill plus the washer uses about 1/2 the water. We are also looking at installing a new hybrid electric water heater that uses a heat pump system. The manufacturer claims a regular electric water heater costs about $550 per year to operate while the hybrid is about $234 plus it recovers faster and has a 10 year warranty. We will be tearing an old shed down this summer (offering the old wood on freecycle.org so it doesn't go to the landfill) and building a new one incorporating some recycled church windows. We are using opaque fiberglass panels for the roof and are going to take a crack at installing a solar panel to operate a small pump in our cistern which is right next to the shed that irrigates our garden.

Shane_1
1/8/2009 6:14:26 PM
The average household in America uses 10,656 kWh per year. If we are to make a significant difference to help prevent global warming we must cut that in half, 5,000 kWh per year. Cutting your very extravagant energy consumption down to 40,000 kWh per year is just not enough. Yes, to prevent global warming we will have to change our lifestyle. Short of that you are just wasting your time.

Gary Reysa
1/8/2009 10:09:25 AM
Hi Shane, The 10,700 KWH you mention is just the average electricity use per household. When you add energy for space heating, water heating, and transportation, the total average energy use is much, much more. Our going in usage was: Electricity 11,300 KWH (a bit less than your average) Heating: 35,000 KWH Water Heating: 8,400 KWH Automobile: 38, 700 KWH As far as I have been able to determine, these are pretty typical for households in cold climates. I agree that they are too high, but I don't think they are out of the ordinary at all. We have cut all of these by more than half, and we continue to make progress in the downward direction. The material I've read on climate change indicates that we will eventually need to cut GHG emissions by about 80%. Our family is still short of 80% target. But, if everyone would do the kind of 50% to 60% reduction we did, we would be a long ways toward the target, and would be in a much better position to figure out how to get the rest of the way. The point is that for most people the first 50% of the saving is easy to do, can be done right now (no new tech needed), can be done by us (rather than depending on others), and is very very cost effective. Its the best of win-win situations. All the figures on our usage, savings, and projects are tabulated here: http://www.builditsolar.com/References/Half/Half.htm Best -- Gary

Shane_1
1/8/2009 1:24:04 AM
The average household in America uses 10,656 kWh per year. If we are to make a significant difference to help prevent global warming we must cut that in half, 5,000 kWh per year. Cutting your very extravagant energy consumption down to 40,000 kWh per year is just not enough. Yes, to prevent global warming we will have to change our lifestyle. Short of that you are just wasting your time.

Dan_26
12/26/2008 2:24:37 PM
Gary's suggestions are really good. There are also additional energy conservation ideas just as or even simpler and less costly. We've compiled from our own practices, as well as the contributions of many, a list of 240 energy savings ideas, of which 180 cost nothing or next to nothing to do. Most are common sense, but then again, where would we be if everyone used common sense every day? :) You can see the list we've compiled here on the Energy Conservation page of our home web site: http://dailyhomerenotips.com/energy-conservation/ Energy conservation is typically must less costly and much simpler for the average home owner than the home owner's own generation of energy. The more we reduce the demand side of the supply - demand equation, the less of a supply we will need, IMO. Dan








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