Journal

Field notes from the truck.

What we measure, why it matters, and how it changes the recommendation. Written by the people doing the work.

What static pressure actually tells you about your HVAC

Static pressure is the cheapest, fastest, most-skipped measurement in residential HVAC. Here is what it reveals — and what most companies miss.

Sizing equipment off square footage is a coin flip. Manual J is the difference between a system that performs and one that limps for ten years.