You can see every supplier in the world on this web site unlike other review sites. Whole house fans are an incredibly cost effective and efficient way to cool your home. If you have a one story home and not all rooms get real hot, you might want to cool only one or two rooms, not the whole house. Air conditioning is terrible for that, because it is designed to cool every room so you pay to cool rooms that can be left hot for the night.
If you have a 2 story home, most of the time only the upstairs is too hot. In this case you can save money by buying a whole house fan sized just for your upper floor square feet.
According to energy.gov:
“The whole house fan pulls air in from open windows and exhausts it through the attic and roof. It provides good attic ventilation in addition to whole house cooling. Whole house fans should provide houses with 30 to 60 air changes per hour (varies with climate, floor plan, etc.—check with a professional to determine what is appropriate for your home). The air-change rate you will choose depends on your climate and how much you will depend on the whole house fan for cooling.”
So when you begin your research into the best system for your home or office you can get help from the Whole House Fan Guy at http://www.WholeHouseFanGuy.com
Installing the old fashioned ceiling mounted whole house fan is tricky and should be done by a professional. But the newer rafter mounted fans are super easy to install. As an example, the QuietCool systems come preassembled in a box so you just pull the system out, cut a hole in your ceiling and bolt the unit to your rafters. Invisco has easy to install systems using their new SmartSupport – you don’t need to lift the whole system to attach it to the rafters – instead you install the rafter to rafter cross brace and then just lift the heavy fan up and hang it on the brace.
There are 3 variations on whole house fans today -
1. The 120 year old ceiling mounted fans that have shutters and are often noisy.
2. The newer (last 15 years) rafter mounted systems.
3. Rooftop mounted systems for those of you with little or no attics.
A lot of web sites have the old fashioned ceiling mounted systems and you can find them at home shows all over the US. So this site will not spend any more time on them.
Only a few companies offer the more modern rafter mounted systems.
Airscape has some of the most advanced systems with an amazing 7 speed fan with smart phone remote control so you can turn it on while on vacation in France.
Centric Air in Orange County has 4 models with German motors good for 40,000 hours of operation. (by the way, if you run a whole house fan for 6 hours a night for 1/2 the year it will run about 10,000 hours in 15 years)
Invisco has the most cost effective whole house fan when you look at the total cost of electric power to cool your home. The SmartSpeed(tm) control lets you turn it on (manually or remotely) and forget it. Invisco whole house fans are the only ones with infinitely variable speeds. You get a dial like a light dimmer to select any speed you want, or you can set it to automatic and it starts at high speed for maximum air flow then at below 85 degrees it slows down until it stops at 75 degrees (or whatever you want). Invisco has 3 models – 2700, 3600 and 4700 CFM. You can select either a PSC motor – variable speed but not low power – or a modern EC motor – variable speed AND power so the lower the speed the lower the power.
QuietCool has the largest selection of whole house fans with 4 lines – ES or energy saver and CL or classic line, Trident and Stealth. Most have 1 or 2 speeds and some 4 speeds.
Tamarack has the only smaller ceiling mounted fans with insulated doors.
Invisco has 3 roof top systems with a unique rain proof cover that gives you maximum air flow. CFM performance selections are 2700, 3600 and 4700.
QuietCool has 2 systems with rain proof hats that are known to restrict air flow. Theirs are rated at 1100 and 2200 CFM.
For more information on any of these write Reviews@WholeHouseFanGuy.com