High-Efficiency Commercial HVAC Systems are the largest single energy end use in most commercial buildings. The Whole Building Design Guide estimates HVAC accounts for 39% of the energy used in U.S. commercial buildings, and most systems run at 50% or less of their capacity.

This is Energy Decision #52 in the complete C&I energy management series by Daniel Burke. It's part of his mission to create the world's largest, free, high-trust energy resource library for commercial and industrial consumers.

In this episode, Daniel Burke covers:

- HVAC part-load performance and why rated peak efficiency only applies at full load

- Oversized HVAC equipment and ASHRAE 90.1 safety factors as an upper limit

- Sizing replacements against measured BAS trend data and utility interval data

- Condensing boiler efficiency, return water temperature, and how it compares with firetube, watertube and cast iron boilers

- ENERGY STAR commercial boiler thermal efficiency and turndown ratio

- Chiller full-load kW per ton and IPLV/NPLV part-load ratings

- CAV with reheat compared with VAV systems

- DDC controls, variable speed drive chillers, water temperature reset and integrated chiller plant control

- HVAC commissioning and whole-building integration

- What payback estimates for whole-building design do and don't tell you about a single equipment replacement

Who this is for: facility managers, plant managers and operations and finance executives at office buildings, schools, hospitals, manufacturing facilities and municipal buildings who are paying to heat and cool with equipment sized for conditions that rarely occur.

If you're deciding which high-efficiency HVAC solutions to invest in, or asking whether your chiller is oversized, this episode is built for you.

Read the full breakdown on High-Efficiency Commercial HVAC Systems at tac-nrg.com

If you're an Indiana C&I operator actively evaluating this decision, get your free Energy Decision Blueprint at tac-nrg.com/blueprint.

Visit tac-nrg.com to access the entire Energy Answers resource library and the Energy Decision Blueprint for qualified Indiana C&I operators.