The National Air Duct Cleaners Association (NADCA); also known as the HVAC Inspection, Cleaning, and Restoration Association; today announces the publication of a white paper on methods of inspecting ...

Duct routing looks simple on drawings, but once construction starts, it becomes one of the most challenging coordination tasks in a building project. Engineers design ducts for performance, ...

The Spra-Kleen humidifiers have a 1-1/2 gallon per hour capacity, which is controlled by a humidistat. According to the manufacturer, the humidifiers have a unique method of humidifying and cleaning ...

Class 2 and Class 3 plenum cables listed as suitable for use in ducts, plenums, and other spaces used for environmental air shall be Type _____. The correct answer is: a) CL2P and CL3P Article 725 ...

While exposed ceilings in office interiors lend a spacious, open feel, this trendy architectural feature has created a new challenge: finding a viable return air path. Plenum ceilings use the area ...

In last week's blog post on transite heat, I explained that most sub-slab ductwork is not transite. It's not transite heat, it's not transite ductwork, and it should not be labeled as such unless the ...

Power limited fire alarm circuits are critical to the safety and well being of building occupants who find themselves in a burning building. During such an event it's critical that fire safety ...