Ventilation and Air Conditioning (HVAC):
HVAC system is designed and built to save energy. It also provides
a comfortable living environment (without hot and cold
spots in some rooms).
Up to 33% of heat can be lost through duct leakage alone in an average
home. Our ducts,
pipes and vents are carefully sealed to meet ENERGY STARŪ requirements.
(Most electric companies offer a discount on your utility
bill for an ENERGY STARŪ home).
The goal of our home is to keep the loss at 5% or less. Our Duct Blaster
and Blower Door Tests measure this performance (shown on next page).
All the duct system is housed in the attic with blown-in cellulose
insulation covering it for maximum energy efficiency. It is therefore
important to ensure the system is built soundly to avoid future maintenance.
the ducts, pipes and vents are first wrapped in R6 insulation, then
tightly sealed with Shurtape DC-181 from Hickory, NC. Shurtape is
a lot more effective than duct tape, because duct tape doesn't hold
up very well long term.
collars and connecting joints are sealed with mastic sealant to
eliminate any air leakage. Mastic Airseal 33 by Polymer Adhesive,
contains fiber and elasticity for expansion and contraction.
Building Science Service, Inc. -
2011 Harvell Street, Asheboro, NC 27205
Jon Guy Tel: 336 736-1771 and, Mike Guy Tel: 336 953-3500