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Attic Ventilation Installation Mount Clemens MI

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Clean Air Master
(586) 468-8681
39512 Venetian Dr Harrison Township
Harrison Township, MI
 
Superior Air Heating & Cooling
(586) 943-1093
26400 Blumfield
Roseville, MI

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Serene Comfort Heating,Cooling & Refrigeration
(248) 765-1714
4037 Morningdale
Troy, MI

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Advance Dust Collection Inc
(248) 656-9001
1790 S Livernois Rd # 105 Rochester
Rochester, MI
 
Allstate Mechanical Llc
(586) 491-8131
37591 S Groerbeck
Clinton Township , MI
 
Tekram Corp
(586) 466-4480
44884 Heydenreich Rd Clinton Twp
Clinton Twp, MI
 
Liebert Corporation
(248) 616-9200
1409 Allen Dr Ste G Troy
Troy, MI
 
United Air Specialists Inc
(248) 589-3310
1271 Rankin Dr Troy
Troy, MI
 
Michigan Pure Air
(248) 650-2158
1533 Walton Blvd Rochester Hills
Rochester Hills, MI
 
Perfect Temp Heating & Cooling
(586) 465-5562
23567 Lakepointe Dr
Clinton Township , MI
 
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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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