Whole House Fan

We are lucky to live here in the shadow of the hills that separate the Tualatin & Yamhill Valleys, so while the days are hot, evenings cool quite a bit and there is always a nice breeze.  Being in the house a year now, we have a good idea of how hot it gets & how it cools at night - and of course keeping in mind we are entering a global cooling trend.  Knowing that a heat pump is not only expensive to install and operate - we sought out alternatives and came to the conclusion that a Whole House Fan should meet our needs 90+ percent of the summer.

Whole house fans have come a long way from the days of a louvered box fan in the ceiling...  Read all about it here:  http://www.airscapefans.com/products/whf17

Part of the benefit of the WHF is venting the air out of the attic - removing the thermal blanket above the living space. As such, we had to install more attic venting to ensure the operational efficiency of the fan.

Gable vents in two sides of the house. Cutting from inside the attic on a hot day sucked.

Vent installed.  Once caulked & the house is painted (stay tuned for updates), they will disappear.

I don't like heights.  Good practice for painting the house I guess...

Due to the 18" of insulation and the positions of the trusses, I had to build "ducting" to raise the fan.  I insulated the outside and ran foam egg crating on the inside to limit the reverberation. 

We cut a hole in the ceiling above the entry way/hallway to the front bedroom, and installed the fan in the ceiling joists. 

Notice another critter in the house???  Stay tuned.  They of course had to be in the middle of all the action.

Fan installed in the attic, sans insulation & clean-up.

We only had the opportunity to run this on Sunday night, so I am not sure of the ultimate outcome.  I do have high hopes, and know that regardless it will be much quieter than neighbor Ben's heat pump!

Oh, and regardless of operation I will say the company was great to work with - from technical advice to getting the WHF the day after I ordered it.  They even included a UPS pre-paid box to return the packing foam so that they can re-use it.  

Additionally, to those tree hugging liberals out there who claim to be environmentally conscious - ditch the A/C and go for a WHF.  One of the "greenest" ways of cooling your house, this thing draws 140 watts - less than turning on the lights in ONE of my bedrooms...