Attic Ventilation Installation Gig Harbor WA

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Hunt's Plumbing And Mechanical
(253) 235-9724
6225 4th St NE
Tacoma, WA
Monday 24 Hours
Tuesday 24 Hours
Wednesday 24 Hours
Thursday 24 Hours
Friday 24 Hours
Saturday 24 Hours
Sunday 24 Hours
AC Unit Installation, Central AC Installation, Furnace Installation, Heat Installation, Heat Pump Installation, HVAC Cleaning, HVAC Contractors, HVAC Maintenance, Residential HVAC Service, Water Heater Installation
Service Types and Repair
AC Unit, Boiler, Central AC, Furnace, Heat Pump, Heater, Water Heater

S&G General Heating And Cooling
(2060 351-4504
2525 S. 284Th St.
Federal Way, WA

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Airefco Inc
(425) 656-7876
7915 S 184th St Kent
Kent, WA
Speidel Drying Systems Intl
(253) 872-7646
19219 62nd Ave S Kent
Kent, WA
Healthy Environments
(206) 860-8749
4742 42nd Ave SW # 631 Seattle
Seattle, WA
Clean Air Technologies
(425) 228-4293
913 S 150th Pl # 203 Burien
Burien, WA
M N Auto Sales
(253) 531-1665
9442 Pacific Ave Tacoma
Tacoma, WA
Apex A & L Inc
(206) 575-8848
572 Industry Dr Tukwila
Tukwila, WA
Sound Filtration Technology
(206) 575-9338
701 Industry Dr Seattle
Seattle, WA
Advanced Heating & Cooling Inc
(360) 415-9335
1211 Ivy Rd Suite #103
Bremerton , WA
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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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