Attic Ventilation Installation Lincolnton NC

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Shrum Machine Works
(704) 736-0046
3268 Summerow Rd Lincolnton
Lincolnton, NC
Quality Comfort Heating & Air Conditioning
(704) 323-5232
P. O. Box 1726
Matthews, NC
Installation, replacement, repair and service of all brands of residential and light commercial heating and cooling systems; indoor air quality products, gas water heaters, on-demand tankless gas water heaters and gas logs; installation of gas lines for all home appliances; Worry Free Service Agreements and 24-hour emergency service.
Homeowner Approved, Better Business Bureau A+ Rating Accredited Business; Award winning Trane Comfort Specialists 2007, 2008, 2009; National Association of the Remodeling Industry Greater Charlotte Chapter; North American Technician Excellence (NATE) Certified Service Technicians.

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Ecoquest International
(704) 865-4000
615 E Franklin Blvd Gastonia
Gastonia, NC
Central AC Distrs
(828) 322-2365
P.O. BOX 9590 Hickory
Hickory, NC
Climatech Heating & Cooling Inc
(704) 483-7343
7087 Campground Rd
Denver , NC
Euro Technical Products Inc
(704) 483-2050
3835 Deer Run Denver
Denver, NC
Yandle Witherspoon Supply Inc
(828) 328-1861
1020 16th St SW Hickory
Hickory, NC
Carrier Corporation
(704) 854-9914
832 N Marietta St Gastonia
Gastonia, NC
Carolina Htg & Clg Inc
(704) 435-4433
1313 W Church St
Cherryville , NC
Economy Heating & Cooling Inc
(828) 464-0705
1116 N Main Ave
Newton , NC
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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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