How to eliminate drafts in your house
Tightening up your house is a great retrofit project that will produce tangible results.
Tightening up your house is a great retrofit project that will produce tangible results.
Starting today, any residential building code official can obtain access to our Duct and Envelope Tightness Verifier training for FREE. This training covers the building

Interested in our Duct and Envelope Tightness (DET) Verification training? Check out the two sample how-to videos below on running the blower door tests using


This week’s HERS Rater training course was in Manteo, NC, just across the water from the Outer Banks. We had a great group of folks

The authors of ASHRAE 62.2 believe that people need to breathe. And people perform best when the air they breathe is clean, high in oxygen and low in carbon
The Building Performance Institute (BPI) announced a new course this summer for individuals who perform building infiltration and duct leakage testing. The BPI Infiltration and Duct Leakage
A few weeks ago, we were in Greensboro, NC providing a dual-certification training (BPI Analyst + BPI Heat Pump Professional) to a group of HVAC
Blowers Carbon Monoxide Friction Rate IAQ Manual-D Manual-J Manual-S Software Static Pressure Water Heater Wrightsoft