If you have no attic you have two choices for how to blow the hot air out of your home and pull cool air in the windows –
- Rooftop mounted whole house fan. Here is the highest performance rooftop in the world –
- Wall mounted whole house fan. Here are two choices for you –
AND IF YOU HAVE NO ATTIC, YOU CAN STILL MOVE ALL THE AIR IN YOUR HOME OUT – EITHER THROUGH YOUR ROOF OR THROUGH A WALL TO THE OUTSIDE. NO OTHER SOURCE OFFERS BOTH A WALL AND AN ATTIC WHOLE HOUSE FAN.
COMPARE THE THREE ROOFTOP SUPPLIERS
The rooftop is also useful as a wall unit if you prefer to avoid work on your roof. There is only one other wall mounted whole house fan source in America – Airscape. Here is the DVS- Note it is 5064 CFM at a price of $2,929 for a 10 speed unit. The Invisco 8005 CFM roof or wall system is $3,750 for infinitely variable speeds. Airscape is $0.58 per CFM, Invisco is $0.47 per CFM
https://invisco.fwscart.com/product/rooftop-mounted-whole-house-fan-8005-cfm