Attic Ventilation Installation Zion IL

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Command Heating & Cooling
(847) 871-9058
872 S Milwaukee Ave
Libertyville, IL
Monday 24 Hours
Tuesday 24 Hours
Wednesday 24 Hours
Thursday 24 Hours
Friday 24 Hours
Saturday 24 Hours
Sunday 24 Hours
AC Unit Installation, Air Quality Testing, Amana Service, American Standard Service, Aprilaire Service, Armstrong Air Service, Bryant Service, Carrier Service, Central AC Installation, Commercial HVAC Service, Ducane Service, Goodman Service, Heat Installation, Honeywell Service, HVAC Cleaning, HVAC Contractors, Lennox Service, Outdoor Cooling System Installation, Payne Service, Refrigeration System Installation, Residential HVAC Service, Rheem Service, Trane Service, Ventilation System Service,
Service Types and Repair
AC Unit, Central AC, Heater, Outdoor Cooling System, Refrigeration System

Covelli & Assoc
(262) 657-4700
3332 109th St Pleasant Prairie
Pleasant Prairie, WI
Dewitt Global Inc
(847) 395-5038
43419 W Wilmot Rd Antioch
Antioch, IL
Mid-American Heating & Air Conditioning Co.
(800) 283-4500
2402 Spring Ridge Drive, Suite #1
Spring Grove, IL
We specialize in Residental and Light Commerial HVAC.
The Better Buisness Complaint Free Award. The Trane Mid-Way Award. Carrier Factory Authorized Dealer Status. Honeywell Contractor Pro Status.
Membership Organizations
Prices and/or Promotions
$100 Off Any Furnace, $250 Off any Furnace and Air Conditioning Combo, or 10 Years Parts and Labor Warranty.

Data Provided By:
Clean Air Flow
(847) 525-2377
2275 Half Day Rd # 350 Bannockburn
Bannockburn, IL
Beck's Heating & Air Conditioning
(847) 748-1034
111 Washington Ave # B
Highwood, IL
Monday 8:00 AM - 11:00 PM
Tuesday 8:00 AM - 11:00 PM
Wednesday 8:00 AM - 11:00 PM
Thursday 8:00 AM - 11:00 PM
Friday 8:00 AM - 11:00 PM
Saturday 8:00 AM - 11:00 PM
Sunday 8:00 AM - 11:00 PM
HVAC Contractors, Residential HVAC Service
Service Types and Repair
AC Unit, Boiler, Central AC, Furnace, Heat Pump, Heater, Water Heater

Hastings Air Energy Control
(847) 362-9660
28835 N Herky Dr # 115 Lake Bluff
Lake Bluff, IL
J & A Healthy Living
(847) 740-9475
782 N Hainesville Rd Round Lake
Round Lake, IL
Intuch Industries
(847) 487-5599
P.O. BOX 100 Wauconda
Wauconda, IL
Ildc Newark
(262) 633-8899
P.O. BOX 081576 Racine
Racine, WI
Data Provided By:

Attic Ventilation Questions and Answers

Attic Ventilation Requirements

What is the proper ratio of ventilation per square foot of roof?

1.5 in per sq. ft. Just make sure that the ventilation is installed so an airway is formed to remove heat through the highest part from the lowest part. Ridge vents and soffit vents work best for this. Also, it is better to have ventilation the entire roof length rather than the 8x12 square vents occasionally in the soffit.

I can't say if it's cost efficient or not, but my attic fan cools the attic a lot. When it's in the 70s outside and the attic fan has not run at all, the attic is too hot to go in. On hot days (80+) it comes on in the early afternoon and runs until about 6:00pm. When it's running I can go into the attic without any problem and it's much cooler.

Another Answer:

The ventilation ratios go according to attic floor size not roof size. You can go as low as 1/300 of the attic floor area (for attics which have a continuous vapor barrier below) to a high of 1.5 in inches x the floor area in feet. So a 1000 sq. feet of attic floor area would require between 480 sq. inches to 1500 sq. inches. That is a huge difference in allowance. I would go with the higher number.
One other thing.. the best system uses ridge vents and soffit vents skipping gable end vents entirely. The number would be split about 50-50 between soffits and ridge.


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