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Attic Ventilation Installation Merrimack NH

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Custom Climates HVAC, LLC
(603) 836-4418
725 Daniel Webster Hwy
Merrimack, NH
Hours
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 Closed
Sunday Closed
Services
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, Outdoor Cooling System Installation, Refrigeration System Installation, Residential HVAC Service, Ventilation System Service, Water Heater Installation
Service Types and Repair
AC Unit, Boiler, Central AC, Furnace, Heat Pump, Heater, Outdoor Cooling System, Refrigeration System, Water Heater

Wilkins Mechanical Services, Inc
(603) 647-7741
7 Bellemore Dr#1
Bedford, NH

Data Provided By:
Joyce Cooling & Heating Inc
(603) 882-4244
51 Lake St
Nashua , NH
 
Nashoba Air Inc
(978) 251-2515
109 Tyngsboro Rd
Chelmsford , MA
 
Matz-Rightway A Division of Merrima
(978) 689-0224
15 Aegean Dr, Ste 11
Methuen , MA
 
Christenson Plumbing & Heating
(603) 413-0325
33 S Commercial St
Manchester, NH
Hours
Monday 24 Hours
Tuesday 24 Hours
Wednesday 24 Hours
Thursday 24 Hours
Friday 24 Hours
Saturday 24 Hours
Sunday 24 Hours
Services
Air Quality Testing, Boiler Installation, Central AC Installation, Commercial HVAC Service, Furnace Installation, Heat Installation, Heat Pump Installation, HVAC Contractors, HVAC Maintenance, Outdoor Cooling System Installation, Residential HVAC Service, Water Heater Installation
Service Types and Repair
Boiler, Central AC, Furnace, Heat Pump, Heater, Outdoor Cooling System, Water Heater

J. Lawrence Hall Company
(603) 882-2021
10 Cotton Rd
Nashua, NH

Data Provided By:
Summit Air Systems, LLC
(978) 361-6580
3 Zames Rd
Derry , NH
 
Merrimack Valley Corp
(800) 272-2334
15 Aegeam Drive #3
Methuen , MA
 
Correct Temp Inc
(978) 688-8700
268 Hamstead St Unit 5
Methuen , MA
 
Data Provided By:

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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