Energy Efficient Solutions - Radiant Barrier, Spray Foam Kits, Solar Attic Fans and more
specials

toll free: (877) 464-5828  

Call Energy Efficient Solutions LLC local: (972) 499-4550  


PRICE MATCH GUARANTEE*

Come for the prices -- Stay for the service

menu menu

PRICE MATCH GUARANTEE*
Come for the prices -- Stay for the service

Call toll free: 877.464.5828







































Same Day Shipping*

UPS Shipping

menu

Attic Fan Size Calculator

Solar attic fan cost review and comparison.

This attic ventilation calculator computes the size and number of solar powered attic fans to achieve the proper ventilation for your attic.  The Home Ventilation Institute (www.hvi.org) recommends that powered attic ventilators provide a minimum of 10 air volume changes per hour.


Step 1. Calculate the required CFM (air flow).

(Click the blue headings below for calculation method A or B.)

Method A:  I know the dimensions of my attic space. (more accurate)

Attic Configuration


Required CFM:

Proceed to Step 2 and use the chart to determine the size and number of fans required to achieve a min. ventilation rate of 10 air changes per hour.


Method B:  I don't know the dimensions of my attic space.

Home Configuration


Required CFM:

Proceed to Step 2 and use the chart to determine the size and number of fans required to achieve a min. ventilation rate of 10 air changes per hour.




Step 2. Use the chart below for your required CFM.


Solar Royal (shop)

Required CFMNum Fans / SizeMin. Soffit Area*
(sq in)
up to 1500(1) / 25 Watt725
1501 to 3000(2) / 25 Watt1450
3001 to 4500(3) / 25 Watt2175
4501 to 6000(4) / 25 Watt2900


ATTIC BREEZE (shop)

Required CFMNum Fans / SizeMin. Soffit Area*
(sq in)
up to 1350(1) / 20 Watt650
1351 to 1550(1) / 25 Watt750
1551 to 2700(2) / 20 Watt1300
2701 to 3100(2) / 25 Watt1500
3101 to 4050(3) / 20 Watt1950
4051 to 4650(3) / 25 Watt2250
4651 to 5400(4) / 20 Watt2600
5401 to 6200(4) / 25 Watt3000

*Note: Adequate intake area is essential to ensure proper
operation of your fan and to avoid attic depressurization.

Energy Efficient Solutions LLC

*Price Match Guarantee applies to verified, advertised prices and verified written quotes.
Some exclusions apply.  Call 877-464-5828 for more details.

Copyright 2002 - 2017 Energy Efficient Solutions LLC
Privacy Policy, Terms and Conditions, Credits, Sitemap