HOFFMAN UNFILTERED
Educational Blog Content for HVAC Professionals

A variable frequency drive (VFD) controls an electric motor by varying its voltage and frequency. Also, a VFD can control the ramp-up and ramp-down...

Many deaths that occur in building fires are not the result of the fire but are, instead, resultant from smoke inhalation or intoxication from carbon...

There are many reasons why electric motors fail, resulting in unplanned and expensive system downtime. Maintenance issues like over-lubrication,...