The calculator includes fields for 4, 15, and 30 percent compression in flexible ducts.

Since Halloween is right around the corner, I thought it would be a perfect time to take a look at some of the ghosts in duct systems that are often tracked down by progressive HVAC companies. Some of these issues are directly caused by the duct system itself while others are an indirect result of its influence.

The Q Duct Outdoor Preinsulated Duct System is engineered for exterior and rooftop applications. 

One of the primary measurements customers use to gauge comfort is the room temperature shown on the thermostat. If the number falls within an acceptable temperature range, the individual should be comfortable, right? Not quite. Could there be other factors at play here that are influencing their comfort that you might be missing? 

If you’re reading this article in a building that has a forced-air HVAC system in it, you’re sitting inside the duct system right now.

When coupled with a single-zone heat pump or air conditioning unit, the 9,000, 12,000, and 18,000 Btu cassette or slim duct air handlers fit a wide range of installations. The systems operate optimally with ambient temperatures as low as -5°F.

Fujitsu General America’s 9,000, 12,000, and 18,000 Btu cassette or slim duct air handlers, coupled with a single-zone heat pump or air conditioning unit, fit a wide range of installations.