Author Archives: andreakbass

It’s Safe to Go Back Underground

Let me just go right ahead and say it; I think ductwork looks neat.   I do.  I like brightly painted spiral duct with elbows and offsets.  I like rectangular duct with flanges and cross-breaking.  And, of course I like the … Continue reading

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A Revolution Is Underway in HVAC Technology

We’re all familiar with small direct drive fans and “speed controllers”.  These speed controllers are rheostats which consume, or waste, energy before it gets to the PSC fan motor, slowing the motor to a desired speed.  They have been in … Continue reading

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The Encyclopedia HVAC-ia

Time and again, the technologies that comprise our HVAC industry have changed. New installation techniques, not to mention whole new concepts for ventilation, make their impact felt on a yearly basis. It can be difficult at times to keep pace … Continue reading

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A New Development in the North American HVAC Industry: Displacement Ventilation

Although the concept and application have been around since 1978 (first commonly used in Scandinavia), it’s only been fairly recently that displacement ventilation has come to North American shores. It’s somewhat surprising that it’s taken this long, given that displacement … Continue reading

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