Sterling HVAC releases rooftop makeup-air unit
Sterling HVAC’s Xcelon system is the first rooftop makeup-air unit that combines innovative hydronic condensing boiler technology with advanced air distribution and heat-recovery methods for levels of efficiency up to 98 percent, the company says. Xcelon utilizes a factory-charged, closed-loop, 35 percent glycol mix for freeze protection with no separate water supply required.
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