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Attic Ventilation: A Year-Round Concern for Massachusetts Area Homeowners

Because attic air circulation is usually insufficient for any season, proper attic ventilation should be an all-year concern for homeowners. Most attics are an enclosed, unconditioned zone of acute temperature and moisture conditions that vary with the climate. What happens up there directly affects comfort levels and energy efficiency in the home. By the same token, household activities also influence attic conditions. Adequate attic ventilation helps smooth out the spikes of temperature and moisture in the attic year-round.  

attic ventilation

Summer

Solar energy radiating through the roof superheats attic air. During the hottest months, attic temperatures may reach 150 degrees. This heat energy radiates through the ceiling, boosting temperatures in rooms below by as much as 10 degrees. To offset this influence, your air conditioner compressor runs longer “On” cycles, and cooling costs climb. In addition, the oven-like conditions inside the attic can degrade wooden structural components and buckle roof sheathing, causing water leaks through displaced shingles.

Winter

The American Institute of Architects (AIA) reports that 90 percent of homes have unacceptably high levels of indoor moisture, mostly resulting from normal activities like cooking, bathing and simply breathing. In winter, warm moist room air naturally rises and migrates into attic spaces. When attic temperatures plunge at night, this moist air condenses. Condensation soaks attic insulation, destroying its capacity to resist heat transfer. Wet wooden structural components in the attic and roof warp and rot. Mold growth is also spawned.

A 1:300 attic ventilation ratio is recommended to meet today’s standards. That means one square foot of attic vent space opening to the outdoors for every 300 square feet of ceiling space. Most attics utilize passive ventilation that draws cool air in through vents below the eaves as hot air rises out of vents near the roof peak. Where existing vents cannot be enlarged or additional vents installed, attic ventilation fans are an option to increase the volume of air circulation and reduce both heat in summer and moisture accumulation in winter.

For more information about year-round attic ventilation, please contact us at Rodenhiser Plumbing, Heating & Air Conditioning. We serve the Route 495/128 area of Massachusetts.

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Rodenhiser Plumbing, Heating, Air Conditioning & Electric, 325 Hopping Brook Rd Holliston MA 01746. Call 1-800-462-9710 Master Plumber: #10961 | Master Electrician #21982A | Sheet Metal Master-Unrestricted: #5867
*Conditions apply, not applicable with any other offer, nor off any trip or diagnostic fee, or previous service. No cash value. Call For details. *For WEB-AC-CHECK Offer also: Promotional price limited to 1 system per home, additional units will be billed at full price. Refrigerant not included. Includes standard 1in air filter, other sizes subject to additional charges. Residential systems only. Must reside within our service area. *For WEB-A-50 Offer also: Not valid on preventative maintenance nor prior purchases. *For WEB-A-75 Offer also: Call or see specials page for more information. *For WEB-H-3250 Offer also: Subject to rebate eligibility and qualifying system choice. The $189 A/C System check examines and assesses the mechanical parts of the air conditioning system. Refrigerant not included. Promotional price applicable to 1 unit per household, additional units will charged at standard rate. Limited to residential homes within our service area.
*Heating system check terms and conditions: Residential Only. Must reside within our service area. Offer only available to 1 unit per household additional units are at full price. Can not be combined with other offers
*Late Season Special Extra Conditions: No Discounts on oil systems. Promotional price limited to one system per home, additional systems will be charged at full price. Residential Systems only. Must reside within our service area
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