Attic Ventilation Installation Acton MA

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Corm-Air Company
(978) 254-1152
PO Box 416
Concord, MA
Monday 8:00 AM - 5:00 PM
Tuesday 8:00 AM - 5:00 PM
Wednesday 8:00 AM - 5:00 PM
Thursday 8:00 AM - 5:00 PM
Friday 8:00 AM - 5:00 PM
Saturday 24 Hours
Sunday 24 Hours
AC Unit Installation, Air Quality Testing, Boiler Installation, Central AC Installation, Commercial HVAC Service, Furnace Installation, Heat Installation, Heat Pump Installation, HVAC Cleaning, HVAC Contractors
Service Types and Repair
Boiler, Central AC, Furnace, Heat Pump, Heater

Ddm Heating And Air Conditioning, Inc.
(978) 537-9335
356 Central Street
Leominster, MA

Data Provided By:
Acton Refrigeration Inc
(978) 486-4656
241 Taylor St
Littleton , MA
Nashoba Air Inc
(978) 251-2515
109 Tyngsboro Rd
Chelmsford , MA
Complete Comfort Systems Inc
(781) 460-2215
24 Normac Rd
Woburn , MA
Patriot Mechanical Services
(774) 328-7645
1 Lakeshore Road
Natick, MA
Monday 7:00 AM - 5:00 PM
Tuesday 7:00 AM - 5:00 PM
Wednesday 7:00 AM - 5:00 PM
Thursday 7:00 AM - 5:00 PM
Friday 7:00 AM - 5:00 PM
Saturday Closed
Sunday Closed
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, HVAC Maintenance, Lennox Service, Outdoor Cooling System Installation, Payne Service, Residential HVAC Service, Rheem Service, Trane Service, Ventilation System Service, Xenon Service
Service Types and Repair
Central AC, Heater, Outdoor Cooling System

Muirfield Mechanical Svcs LLC
(978) 263-7130
80 Littlefield Rd
Boxborough , MA
Ayer Oil Co Inc
(978) 772-2031
25 Westford Rd
Ayer , MA
Central Air Systems Inc
(781) 899-7110
38 Yetten Ter
Waltham , MA
Coan Inc
(508) 653-5050
196 W Central St
Natick , 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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