Electricity bills have been steadily rising with no respite in the foreseeable future. Increasingly, home owners are turning to efficient building envelopes to create homes that utilize less energy. Investing in making your home more efficient and more comfortable will save you money in the long term and will reduce your impact on the environment.
But energy-efficient retrofits don't come cheap and you want to know where you are going to get the most energy saving bang for your buck. One way to determine where your energy saving investment will go the furthest is by getting a home energy audit. This will show where your conditioned indoor air is escaping so you can plug the gaps in your building envelope.
While a professional home energy audit will be more accurate, you can do your own and get a general idea of which issues to tackle first. Keep a checklist of issues which you can prioritize according to your budget.
Mind the Gap
Each home has gaps, cracks and holes through which indoor air escapes. You can save as much as five per cent to 30 per cent per year by plugging gaps in your building envelope. Sealing these gaps with caulk is one of the cheapest and easiest ways to reduce your energy consumption.
Do a visual inspection both inside and out, taking special note of wall junctions, plumbing openings, lighting openings, electrical outlets and switch plates, around door and window frames, wall-mounted air conditioning units and around vents and fans.
Check the seals around doors and windows for cracks or deterioration. Check along baseboards and where floors and ceilings meet the walls.
Another way to check for gaps is through a blower door test. You can do a building pressurization test without the blower door equipment.
- Conduct your test on a windy, cool day
- Turn off all combustion appliances such as gas-burning water heaters and furnaces
- Close all openings like windows, doors and flues if you have fireplaces
- Suck the air out of your home by turning on all exhaust fans, dryer vents, bathroom fans, stove fans etc.
- Light a stick of incense and walk slowly from room to room, paying particular attention to places where leaks are common like around windows and electrical outlets
- Smoke that is blown in or sucked out will show you where the leaks are
Once leaks have been detected, caulk the openings or replace weather stripping to seal your home.
Inspect your Insulation
These kinds of retrofits cost more, but they do make a huge difference to your monthly energy bill.
Ensure that your attic hatch is insulated, that it seals tightly and that the weather stripping around the attic opening is in good condition.
Check for gaps and holes, especially around vents, electrical boxes, ductwork and chimneys.
Inspect the attic vents to ensure that they are not blocked by insulation. Attic vents enable any moisture that builds up in the attic to escape.
Check that your insulation isn't flattened or settled as this will reduce its efficacy. Measure the amount of insulation you have in your attic to ensure that it meets current building standards. If you have an older home, improving your insulation can really help to seal the deal.
You can check the thickness of insulation in your wall by switching off the circuit breaker to an exterior wall outlet. Be absolutely sure that the power is off. Remove the cover plate and gently press a crochet hook into the wall. This will tell you how much insulation is in the wall and some insulation will come out when you remove the hook so you can see what kind of insulation it is.
Unfortunately, this test doesn't tell you if your wall insulation has settled, only a thermographic inspection can show where insulation is in a wall.
Is your basement or crawlspace conditioned? If not, it should have a minimum of R-25 insulation. This is especially important if you have heating or cooling appliances, ducting or plumbing running through this space.
Check that your water heater, hot water pipes, and ducts are all insulated.
All Systems Go
Inspection of your heating and cooling systems should take place on an annual basis. If your heating or cooling systems have filters, these should be cleaned and checked regularly according to your manufacturer's instructions. Some filters need to be cleaned every month. Doing so will vastly improve the efficiency of those systems.
Have a professional service your furnace annually or do it yourself. Get a guide here.
If your furnace or air conditioner is more than 15 years old, consider replacing it with an Energy Star appliance. Check you ducting for gaps, holes or other corrosion and fix these with mastic.
'Vampire' loads account for 10-15 per cent of your home's energy consumption. Get a power bar with a timer so your appliances aren't on when you are at work or sleeping. If your appliances are old, consider investing in Energy Star appliances which will reduce your monthly energy bill.
This post was originally published on Greenmoxie.com.
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"Heat rises so you want to make sure heat is not escaping the living space,” says HomeZada founder John Bodrozic. "An access door into the attic is a spot most people miss. Putting insulation on the back side of this door can help minimize heat loss."
"Another technique that people can use to keep their home warm this winter without costing an arm and a leg is to let in the sunlight during the day, and keep the heat in with thick heavy drapes/curtains at night and then repeat the process,” says Alexander Ruggie, PR director for 911 Restoration.
Are there rooms in your house you almost never go in? If you can avoid heating those by closing ducts and doors or shutting off the in-room thermostat, you can spend less money keeping the rest of your home warm. "You are essentially not spending money heating a room that is rarely used,” Bodrozic says.
"If your air filters are clogged up, you furnace needs to run longer and harder to maintain your temperature setting,” Bodrozic says. Dirty filters could be heating your home inefficiently and costing you money in the long run.
If you have a wood-burning fireplace in your home, you probably also have a flue. "Flues can be a huge loss of heater air because it is essentially designed as a pathway to expel heated air as efficiently as possible,” Ruggie says. "Closing off the flue is a great way to keep the heat in and save money on the bill because less warm air is escaping [your home]." And if you’re lucky enough to have that wood-burning fireplace to begin with it, use it! “Using wood sounds primitive,” Ruggie says, "but it’s still a great way to get heat in the home for a relatively low cost and they’re fun for the whole family to sit around as well."
"Doors that lead to the outside should have a seal on the bottom that prevents heat loss,” Bodrozic says. If you don’t have stripping, put it in — and if you do, check to make sure it’s working and you aren’t feeling drafts near doors or windows.
"Large furniture absorbs heat fairly easily and this can keep heat from properly circulating into your home,” Ruggie says. If you have furniture over central air ducts or in front of radiators, try to move it or at least pull it out from the heat source as much as possible during winter.
Getting a programmable or smart thermostat can automate the process of optimizing your heat settings. "When you are sleeping, you can stay warm with blankets and covers,” Bodrozic says. "Then time your heating to pick back up to a higher setting when you are awake and in the house."
“Window films can cut up to 30 per cent of a home’s energy costs and reject 99 per cent of harmful UV rays that can damage furnishings and carpet, without changing the exterior look of a home,” says a 3M Window Film spokesperson.
Are there spots along your windows and doors that feel cooler than they ought to? If upgrading your windows isn’t an option, you can use temporary solutions like sealing the windows with plastic over the winter. Even taping over cracks and drafty spots with painter's tape can make a difference.
It sounds obvious, but are you sure all your ducts are actually connected to vents, and not just blowing hot air to nowhere? "Check every vent in the home to make sure it is still connected as over time, the ductwork can sag and disconnect from the vent,” Bodrozic says. "This means you would be blowing hot air into either your attic or crawl space, which is wasting money." And while you’re checking the connections on those ducts, look for insulation too. "Hot air moves from the furnace through each duct,” Bodrozic says. "If the insulation has fallen off a duct, more heat can be lost as the air is traveling through the duct."
It’s a lot cheaper to conserve heat than it is to make it, Ruggie says. "So for many, simply getting a smart thermostat, or putting the home on a timer can be an extremely cost effective way to stay warm without losing your shirt in the process."
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