Building Automation  

This session introduces ASHRAE Guideline 36-2018 scope, information needed from HVAC system designer and TAB contractors, the general sequences for the entire system, for the ventilation zones, and for the thermal zones. Key sequences for single-duct VAV with reheat terminal units and for single zone VAV air handling unit with return fan are discussed in detail. Automated Fault Detection and Diagnostics (AFDD) algorithms for the single zone VAV air handling unit with return fan are explained.

In this session, we cover high performance HVAC control sequences that leverage ASHRAE Guideline 36 (G36). We cover what exactly G36 is, what the benefits are, and how to screen buildings to see if they would be a good candidate for a controls retrofit leveraging G36. Through field demonstration results from multiple research projects, we show that G36 retrofits can save 25-45% whole building energy use and are cost effective, up-ending conventional wisdom that controls retrofits are not cost-effective.