50% Discount for HVAC Trainers
Do you teach HVAC to students for a living? We want to acknowledge you by offering you 50%-off of all of our HVAC related trainings.
Do you teach HVAC to students for a living? We want to acknowledge you by offering you 50%-off of all of our HVAC related trainings.
We’ve just added a new coupon code that will give you 20% off of your Manual-J load calculation, if you order before June 1st. If
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!
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?
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
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
There are three main types of insulation – fiberglass batts, blown in fibers (cellulose or fiberglass), and spray foam. They are all commonly used to insulate attics.

I’ve been consistently delivering design work with Wrightsoft’s Rightsuite for over 15 years at this point. When I first learned to use the software, I
Blowers Carbon Monoxide Friction Rate IAQ Manual-D Manual-J Manual-S Software Static Pressure Water Heater Wrightsoft