Field notes
Short notes from the desk, written for site.
What we check before we select, in the order we check it.
Gulf ambient and T3 · 3 min read
Sizing for Gulf ambient
Why a unit chosen on its nameplate falls short in August, and what to select on instead.
VRF or chilled water · 3 min read
VRF or chilled water?
Two ways to cool a commercial building, and the inputs that decide between them.
Air handling unit selection · 2 min read
What an AHU selection needs
The list the engineering desk works from, so a selection arrives complete.
External static pressure · 2 min read
External static pressure, plainly
The number behind most ducted-unit complaints, and how to get it right.
Replacement planning · 3 min read
Replacing HVAC while the building stays open
How to plan a replacement around the people still using the building.
