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Attic Ventilation Installation Arnold MO

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Environmental Heating, Cooling and Major Appliance Repair
(314) 699-4144
NULL
Saint Louis, MO
Promotion
Environmental Heating & Cooling -
Winter Special

Check and Clean Safety inspection of your Furnace for only $65 (additional units $50 each)

Free service calls on your heating system during the 2012 heating seas
Hours
Monday 6:00 AM - 6:00 PM
Tuesday 6:00 AM - 6:00 PM
Wednesday 6:00 AM - 6:00 PM
Thursday 6:00 AM - 6:00 PM
Friday 6:00 AM - 6:00 PM
Saturday 8:00 AM - 1:00 PM
Sunday Closed
Services
AC Unit Installation, Boiler Installation, Central AC Installation, Commercial HVAC Service, Furnace Installation, Heat Installation, Heat Pump Installation, HVAC Cleaning, HVAC Contractors, HVAC Maintenance, Residential HVAC Service
Service Types and Repair
AC Unit, Boiler, Central AC, Furnace, Heat Pump, Heater

Martin Frank Heating & AC
(314) 487-4118
4132 Pasco Dr Saint Louis
Saint Louis, MO
 
Power Supply of Illinois
(636) 343-5252
201 Sun Valley Cir Fenton
Fenton, MO
 
Tridim Filter Corporation
(636) 343-5525
915 Horan Dr Fenton
Fenton, MO
 
Commair
(314) 963-0057
315 N Laclede Station Rd Saint Louis
Saint Louis, MO
 
Air Solutions Inc
(314) 846-7220
7509 Summerfield Oaks CT Saint Louis
Saint Louis, MO
 
Heatrans Corp
(636) 343-4161
1549 Fencorp Dr Fenton
Fenton, MO
 
Trane Parts Distribution Ctr
(636) 343-5577
2275 Cassens Dr Ste 107 Fenton
Fenton, MO
 
Munters Moisture Control
(314) 781-5550
11040 Lin Valle Dr Ste N Saint Louis
Saint Louis, MO
 
Mass & Thermal Systems Co
(636) 225-4662
1605 Country Hill Ln Ballwin
Ballwin, MO
 

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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