Manual-S is being required by many building programs and local codes these days. The problem is, it’s really hard to tell whether the installing contractor
Before jumping into the ASHRAE 62.2 options for existing homes, make sure you’ve read and understand how to calculate the airflow requirements for new construction,
Building Science + HVAC Training & Certification We’ve been working in the energy efficiency field since 2002. We’re not just teaching from a textbook, we’re
Not only do homeowners want an efficient house, but they also assume that they will be comfortable in every room of the house. Unfortunately, this simple desire cannot be addressed solely by a great envelope system. To achieve comfort in every room, focused attention must be paid to proper design and installation of the HVAC system.
120,000 homes were “officially” evaluated by HERS raters in 2010 – a 7% increase from 2009. Believe it or not, this number represents 41% of all new homes built in 2010!
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
If you’re installing an HVAC system based on Manual-J sizing calculations, how do you know what size the ducts need to be for each room?
Friction Rate The friction rate tells us how much friction our ductwork should produce, per 100’, so that we consume the rest of our available
