When I started building systems commissioning 25 years ago, it did not take long to figure out that more was needed to confirm that the commissioned systems were complete and ready for testing than just the general contractor’s word for it.
Modular heat pumps, geothermal, energy recovery, demand control ventilation, an integrated digital control system, and more stretched out the sustainability and maintained a lean energy profile to serve local residents
The forward march of progress in terms of basic equipment and controls sophistication has made the combination of condensing and non-condensing boilers more attractive than ever. Still, you can’t just grab one of each and expect miracles.
Leaning on experience and data from various K-12 cities and projects, the author pursues some less conventional design approaches. They may revolve around radiant heating and/or cooling, but depending on school size and other factors, the smart use of heat recovery, DOAS, and improved central plants could also put a project on the HVAC honor roll.