Ductwork design for new construction: why Manual D pays for itself
Ductwork is the least glamorous line item in a mechanical budget and the most common reason a high-efficiency system underperforms. A premium…
Technical Guides
HVAC Guides for Builders
Technical articles on HVAC sizing, ductwork, heat pumps, and code compliance, written for builders, general contractors, and property managers.
Cold-climate heat pumps in New England: performance, sizing, and incentives
Ten years ago, specifying heat pumps as the sole heat source in a New England project was a leap of faith. Today…
Right-sizing HVAC for multi-family projects: a developer’s guide
Multi-family HVAC is where good projects quietly lose money. Oversized equipment inflates first cost and short-cycles for the life of the building.…
Massachusetts Stretch Energy Code: what builders need to know before permitting
If you build in Massachusetts, the energy code is no longer a checkbox at the end of the job — it shapes…
Ductwork basics: why static pressure matters
Even a right-sized unit disappoints if the duct system cannot move the designed airflow. Static pressure is the tell.
How right-sizing with Manual J prevents callbacks
A room-by-room load calculation is the difference between guessing and engineering. Here is how it matches equipment to the building, so systems…