Small HVAC System Design Guide

Guideline / January 26, 2010 / Building Innovation, New Construction

This document provides design guidance on how to improve the installed performance of small packaged rooftop HVAC systems in commercial buildings. It is targeted at architects, engineers, and design/build contractors involved in the design of small packaged rooftop systems for commercial building applications. Included here is information and advice on overall building design practices to minimize HVAC loads, unit selection and sizing, distribution and control system design, commissioning, and operations and maintenance. Small HVAC systems are installed in about 40 million ft² of new California construction annually. By applying the integrated design principles in this document, the energy consumption and costs of buildings with small HVAC systems can be reduced by 25% to 35%.