Attic Ventilation Installation Plymouth MA

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Paiva Heating & Air Conditioning
(508) 586-5202
28 Cranberry Dr
Halifax , MA
(800) 479-4822
300 Manley St
West Bridgewater , MA
SB Plumbing and Heating
31 Vernon Street
Plymouth, MA

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Key Heating & Air Conditioning
898 Long Pond Road
Plymouth, MA

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(774) 296-5516
10 Wareham Street
Carver, MA
Duct Work & Central Air Condtioning
M-F 7-5 and Saturday by Appointment
Membership Organizations
HVAC Industry Proffesionals
Prices and/or Promotions
Early Seaon Discount on Air Condtioning Installations

D R T Heating
(508) 759-2674
1248 Route 28A
Cataumet , MA
Heating & Air Conditioning Services
(508) 588-9025
300 Manley St
West Bridgewater , MA
Beantown Ac & Heating
(508) 830-1230
4 Stephens Street
Plymouth, MA

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Natural gas home energy services
(781) 831-3723
33 Hayden ridge
Plymouth, MA
Plumbing, heating, cooling and 24/7 service. Mass plumbing #32352

Quality Mechanical Systems, LLC
(508) 291-6170
143 Great Neck Rd
Wareham, MA

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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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