Your HVAC Has Been Preparing for a Worst Case That Never Comes

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Prove me wrong!

I am not someone who likes uncertainty. I am an energy researcher. When a result does not match the prediction, you find the error, fix it, and move on. For years, I could not find the error. My device kept outperforming what the standard calculations said it should be able to do. Consistently. Repeatedly. By around 26 percent. So I did the one thing that made me genuinely nervous — I handed everything to an independent expert and asked him to prove me wrong.

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DX Cooling Opportunity

HVAC systems that mix fresh air and building return air to varying quantities for cooling purposes often have control logic comparing the total heat content of the outdoor to the total heat content of the return air.

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Questions?
Conventional multizone units continuously maintain a cold deck temperature capable of satisfying the maximum cooling demand of the warmest zone and a hot deck temperature capable of satisfying the maximum heating demand of the coolest zone. This approach ignores the actual, continually changing heating and cooling requirements of the building, resulting in unnecessary energy consumption. This video presents an improved control strategy that automatically adjusts to the building’s real-time requirements. In documented applications, this logic has reduced HVAC energy consumption by more than 50% while maintaining occupant comfort.