Note: This article is based on the 2002 NEC. Even if you work with stamped drawings, you'll eventually need to do commercial load calculations in the field or on a licensing exam. The National ...

This is part 1 in an ongoing series on HVAC load calculations. The folks at SNIPS have asked me to do a basic how-to article about HVAC Manual J load calculation as that is allegedly a big part of my ...

Note: This article is based on the 2008 NEC. A dwelling unit is a single structure that provides complete and independent living facilities, according to the NEC definition found in Art. 100 (Fig. 1).

SOLAR: Solar heat gain through glass facades is among the inputs that ASHRAE Standard 183 requires engineers to model in three dimensions. June 3, 2026 Here is something I have noticed presenting at ...