by MC2 » Mon 18 Jun 2007, 16:28:14
$this->bbcode_second_pass_quote('Niagara', 'O')ne of the best energy saving devices I've come across is the attic exhaust fan. In the summertime the attic can get extremely hot, especially in homes with black shingles. Temps can exceed 140F no problem. Heat then radiates down into the house, putting a huge load on the AC.
I've found that with the fan running the AC won't kick in nearly as often.
The small amount of power the fan uses is greatly offset by the AC savings.
Great tip! I put one in myself about 15 years ago, and it's the best 100 bucks (and a few hours work) I've ever invested. Other things that will help is putting in additional attic insulation, including a good seal on the access door (from living space.)
Here, in no particular order, are some other things that really can make a difference:
Better weatherstripping around doors and windows (these can be huge themal leaks, especially if older or worn.)
Passive solar design for south-facing windows (my house has large windows on the south and some thermal mass to absorb and re-radiate solar energy captured. In winter, I don't even need heat during the coldest, sunny days.)
Programmable thermostat(s) - don't cool/heat when you don't need it - also shut off rooms not in use.
Wrap your water heater in one of those insulation blankets. Also insulate the hot water pipe runs. Turn the temp down a bit.
Invest in a newer, modern AC or Heat Pump unit. A 14 or 15 SEER really makes a huge difference over the older 7-10 rating. I replaced both of my heat pumps over the past several years, and the difference is large.
Replace lights with the new compact flourescent designs. Less current consumption, plus less heat generated. Longer life too. A no-brainer.
There are a zillion little things you can do that help, including the stuff in the subject article. But take care of the big things first.