ConsultAir provides residential HVAC design services built around ACCA’s Manual J, Manual S, and Manual D standards, the same three connected calculations required by most current building codes to properly size, select, and deliver conditioned air throughout a home.
Each of these standards has its own dedicated guide below, covering not just what each one does, but the level of detail and accuracy that separates a properly performed calculation from a shortcut.
In addition, you’ll find other useful topics related to residential HVAC design and home building.
Residential HVAC Design & Home Building Topics
The foundation of every proper residential HVAC design. Learn what separates an accurate Manual J heat load calculation, one built on real window ratings, true orientation, and precise inputs, from a rushed or shortcut version.
Once heating and cooling loads are known, Manual S determines the correct equipment size needed to meet them. Proper equipment sizing provides lasting comfort and energy efficiency for the life of your home.
Manual D duct design isn’t just sizing ducts to fit the space available. By properly calculating the airflow, friction rate, and total effective length your Manual J and Manual S calculations call for, this process also identifies where adequate space for duct routing doesn’t exist before framing is complete.
Satisfying the local building department with a code-compliant Manual D report and designing a duct system that’s actually installable aren’t always the same thing. Discover the difference between a duct design that satisfies the plan reviewer and one your HVAC contractor can actually install.