Technical Tips

Is one return enough? Had a conversion will a fella about a topic I hear about far too often. He had someone ask (require) for there to be a return in every room. I knew Manual D® didn’t say that.

Many contractors use combustion analyzers in the field to verify safe operation of gas-fired appliances. This involves drilling a hole in the vent pipe to measure flue gas elements. Once measurements are done, the hole must be sealed to return the venting system to its original condition. Existing codes and standards are silent on this process. Here’s my “deep dive” on the subject.

In the HVACR industry, it’s all too common to hear comments about ductwork being too big or too small based solely on appearance. Similarly, there are far too many comments that a system will never condition a space properly just by looking at it. While everyone is entitled to their opinion, there is a significant difference between opinions based on expectations and those grounded in precise measurements.