Day: December 14, 2010

Introduction to Manual-J

Manual-J Heating and Cooling Load Calculations Manual-J is the name for a specific protocol (often called “Heat Load Calculation” or “Cooling Load Calculation“) used to determine

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HVAC & Building Science Training

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

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Attic Insulation Q&A

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.

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How to Determine Friction Rate

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

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