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Attic Ventilation Installation Apache Junction AZ

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Farnsworth Heating & Cooling
(602) 428-0331
460 S Greenfield Road
Mesa, AZ
Promotion
18 point AC tune only $39.95. It comes with a free washable filter and a free pound of freon. A $120 value! Call today to set up an appointment.
Hours
Monday 24 Hours
Tuesday 24 Hours
Wednesday 24 Hours
Thursday 24 Hours
Friday 24 Hours
Saturday 24 Hours
Sunday 24 Hours
Services
AC Unit Installation, Boiler Installation, Central AC Installation, Furnace Installation, Heat Installation, Heat Pump Installation, HVAC Contractors, Water Heater Installation
Service Types and Repair
AC Unit, Boiler, Central AC, Furnace, Heater, Water Heater

Air B Clean
(480) 641-0084
4435 E Elmwood St Mesa
Mesa, AZ
 
Clean Air Clinic
(480) 497-4755
1113 E Artesian Way Gilbert
Gilbert, AZ
 
Cool Runnings Heating & Ac
(480) 226-6012
2179 West 20th Avenue
Apache Junction, AZ

Data Provided By:
Desert Foothills Mechanical
(480) 283-9391
10462 E Portobello Ave
Mesa, AZ

Data Provided By:
Webb Distributors
(480) 832-3438
3643 E Main St Mesa
Mesa, AZ
 
Arizona Paradise Air Conditioning, Inc.
(480) 220-7012
3701 E. Baseline Rd. F-106
Mesa, AZ

Data Provided By:
Superior Auto Air Ltd
(520) 689-2727
467b W Main St Superior
Superior, AZ
 
Valley's Best Air Conditioning
(480) 892-3938
6927 East Parkway Norte #102
Mesa, AZ
 
A/C Doctors http://www.theacdoctors.com
(480) 718-9820
serving your area
Mesa, AZ
 
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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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