Keeping it Cool, Tips to Make Your Home More Confortable - by Seattle's Home Inspection Team

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With the warmer weather, we are looking to ways to keep our homes cool. Here are some tips to keep your home comfortable.

Window Coverings
When the temperatures are expected to be high, consider keeping shades closed throughout the day. It is amazing the difference in heat gain when the sun is kept off the windows. I have blinds, thermal shades and exterior sun screens that we use on the hottest days to keep the solar gain to a minimum.

Fans
I have a digital indoor and outdoor thermometer that I use to determine when the outside temperature has dropped below the inside temperature. When the temperature outside has dropped in the evening, I have a large box fan that is tightly fitted in a back bedroom window that exhausts the hot interior air outside. This causes negative air pressure in the house, and when you open other windows in the home, you will get a nice cool breeze coming in.

Fan Controller
I have built a simple thermostat to control this fan, (See a diagram and instructions here) so when the house temperature drops below 67 or so, the fan turns off automatically. Don't forget to remove the fan, close up the windows and shades in the morning to keep the air as cool as possible during the day.

Wall Air Conditioners
We have also installed ceiling fans to keep the air moving, this helps make it much more comfortable, especially in bedrooms. In my home, I have small room air conditioners that keep an individual room cool. this is especially nice on very hot evenings when you can't cool the house with a fan because the outside air temperature it too high. If you keep the door closed these window units are a great choice.

Home Air Conditioners
If you have a central air conditioner, there are a few items you should consider to keep it running at peak efficiency.

The outside component of your unit is called the compressor. It houses the pump and the blower that cool the compressed gas that is then pumped into the home to cool the air inside. We see these units covered with landscaping debris (grass, weeds, bushes etc.) all the time.

When this happens the airflow is restricted and it has to work harder to cool your home. Always keep these units clear from obstructions, so they can easily cool the coils. Keep lawn clippings from blowing on them when trimming the grass. Sometimes dryer vents are located too close to AC units, plugging them with lint.

Read your manual on the best way to clean the unit. Some may be hosed off, ALWAYS TURN OFF THE POWER when cleaning them. Others require more complex cleaning. A dirty AC will waste a lot of energy. When in doubt have a professional clean it regularly, usually at least once a year.

Attic Fans
These will help keep he attic spaces cool. Ideally the attic is the same temperature as the outside air. In the summer, I routinely enter attics that are as high at 145 degrees! Ventilation and insulation are both critical to keep this heat away from your living space. If your attic has less then 12 inches of insulation consider having more added. This will pay for itself in heating in winter and keep you much more comfortable in summer.

Roofing
When re-roofing a home, consider using light colored coverings. They will reduce the heat from the sun. We always recommend silver coating un-coated torch down roofs. It will extend their life and help cool your home.

Thermostats
Use automatic thermostats with timers to control your cooling system. Be sure your air filters are clean, and your ductwork is tight, well insulated and free from leaks. We see leaking ductwork every day!

Landscaping
We recommend that you plant trees that will drop their leaves in winter on the south and west side of homes. This way you have shade in summer and the sun can naturally heat the home in winter. Remember to keep all plants trimmed away from the building.

"To increase the efficiency of your air-conditioning unit by up to 10 percent, plant trees and shrubs to shade the outside unit; place them at least 18 inches away so they don't block the vents on the compressor. For more tips on ways to use landscaping to increase the energy efficiency of your home, see the DOE's landscaping advice." Consumer Reports

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Home energy savings tips

Saving energy in your home will not only save you money, but will also help the environment by reducing the need for hydro-electric dams and fossil fuels used to produce electricity. These steps will pay for themselves again and again for years to come.

The average home looses up to 20% of its heating due to drafts. Doors, windows, outlets, and switches are all common areas of heat loss. Most heating bills in our area can be $2000 a season or more meaning those drafts can cost you $400 a year! That buys a lot of weather stripping and caulking. Most doors and windows are easy to check with just your hand, if you feel the cold air coming in then you are loosing heat. Outlets and switches also can be drafty, if you feel cool air around them, consider foam gaskets under the cover plates. Old single pane windows can be made more efficient by installing storm windows or inside magnetic panels to reduce drafts. Read more on caulk and weather stripping here.

During the day, let the sunlight in to reduce lighting costs, but at sunset, closing curtains will also help reduce heat loss. Consider cellular blinds as they are more energy efficient then blinds and shutters.

Turning down your thermostat by one degree can save over 5 percent on your heating bill. Consider electronic thermostats with built in timers to reduce energy use when you are at work or sleeping. You can still awaken to a warm house and not use energy when you don't need to. Avoid heating rooms you don't use by closing heat vents or turning down individual room thermostats.

Have your heating system checked regularly to assure that it is running at top efficiency, and always keep air filters clean. A tiny change in a furnace or boiler systems combustion can dramatically lower your heating bills and will often pay for the service call in energy savings.

Water heaters use a lot of energy and should have the thermostats set to 120 degrees. Not only will this save energy, but dramatically reduces the risk of scalding injuries. If it is set higher, you will be using a lot of cold water to bring the temperature down. Gas how water heaters have their thermostat on the exterior and are easy to set, electric heaters are under cover and should be set by a professional. Read more about energy efficient water heating here.

Take showers instead of filling a bath and save about 50% of the energy. Low flow shower heads save both water and energy. If you have a hot tub, make sure the cavity under the tub is insulated and you use a insulated cover. Turn down the heat when you are not going to use it for an extended time.

Lighting is one of the easiest ways to save energy and money. Compact florescent lights (CFLs) are direct replacements for standard incandescent light bulbs. The 100 watt equivalent lights can last 13 times longer and use less then 1/4th the energy. When you buy and install a 6 pack of CFLs, it is like putting $550 in your pocket! They have styles now for replacing bathroom globes and outdoor flood lights. But remember they can't be used with dimmers, and must be disposed of properly. Most hardware stores will take the old lights back.

Computers use significant energy, especially those that are left on all the time. Remember a screensaver saves no energy, but hibernation does, or better yet power them off and save more. Modern LCD displays use 1/3 the energy then a old CRT. Same with most laptops, they are more energy efficient then a standard desktop.

TV's use power all the time, even when they are turned 'off'. Most entertainment devices with remotes (DVD players, VCRs, stereo equipment also use power in standby mode. Unplugging them when you are not using them will save energy.

Keep freezers free from excessive ice buildup. A defrosted freezer is more efficient. Open the doors a minimum amount of time to keep the cold inside. Every time a refrigerator door is opened, the compressor had to re-chill the contents.

Laundry is another big power user, so wash full loads. Use the coolest water temperature that will do the job, and always rinse with cold water. The washing machine itself doesn't use nearly the energy as the water heater does to wash in warm or hot water. The clothes dryer is one of the highest energy use appliance in most homes. Use a clothes line and you will save significant energy.

Look for the "Energy Star" label on all household appliances, and buy the ones with the lowest energy use.

Home without adequate insulation should upgraded. The first place is in the attic, it is cheap and easy to add. The payback in energy savings is very fast since 1/3rd of heat lost is through the roof. If you walls are un-insulated we recommend adding it there too. It will pay you back for as long as you own the home and increase the re-sale value.

Examples of Where to Insulate

1. In unfinished attic spaces, insulate between and over the floor joists to seal off living spaces below.
1A attic access door
2. In finished attic rooms with or without dormer,
insulate …
2A between the studs of "knee" walls;
2B between the studs and rafters of exterior walls and roof;
2C ceilings with cold spaces above;
2D extend insulation into joist space to reduce air flows.
3. All exterior walls, including …
3A walls between living spaces and unheated garages, shed roofs, or storage areas;
3B foundation walls above ground level;
3C foundation walls in heated basements, full wall either interior or exterior.
4. Floors above cold spaces, such as vented craw spaces and unheated garages. Also insulate …
4A any portion of the floor in a room that is cantilevered beyond the exterior wall below;
4B slab floors built directly on the ground;
4C as an alternative to floor insulation, foundation walls of un-vented crawl spaces;
4D extend insulation into joist space to reduce air flows.
5. Band joists.
6. Replacement or storm windows and caulk and seal around all windows and doors.

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