The company has released two condensing gas boilers, Models 550 and 750. Features include 93.9% thermal efficiency, 94% combustion efficiency, low NOx certification, PVC venting for direct vent and direct exhaust, and 20% to 100% modulation.
Why was one floor’s laboratory ventilation failing to keep up, when it was even the closest floor to the rooftop fans? Some system sleuthing led two engineers to a fitting conclusion. Read more stories in May Issue 2017.