The NEBB Professional 2024 - Quarter 3

We proceeded to conduct additional testing on the residence to resolve the negative pressurization is sue. After repairing the intake duct to the dedicated outdoor air system, adding glycol, and making the pre-heat system functional, we logged into the unit controller to enter the necessary set points to obtain the 70°F (21°C) air at 50% relative humidity that the unit was designed to supply. Once these settings were changed and everything was confirmed to be func tioning as needed, we were able to pressurize the resi dence enough to operate two of the nine gas fireplaces and the wood-burning fireplace in the Great Room. After determining how much additional fresh air would be needed to sufficiently pressurize the space to allow the rest of the fireplaces to operate simultaneously, the owner decided that all the fireplaces would not need to be burning at the same time. We also recommend ed that all the gas fireplaces be changed to ventless systems, where the flues could be regulated down to help minimize the negative pressure created by the fires and help heat the rooms instead of allowing all the heat to escape through the flues. As you know, the hotter the flue, the greater the draft. In conclusion, we see everything in the field of TAB. When you think of a residential installation, you often assume it is simple and that there is not much to it. However, I can tell you that we experienced a lot with this residence and learned that some residential en gineers really go the extra mile to make things work properly.

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Despite the expertise of these engineers and the expe rience of our TAB professionals, we often find that we must lean on the service group of our firm to get the re frigeration circuits and controls components set to the proper values. Once these are achieved through the review by the RCx team, you would be amazed at how quickly and smoothly things come together. Currently, the owner of the residence is extremely happy with the service we provided and now has a service agreement with our com pany to maintain the equipment and keep everything operating as it should. Sometimes, even on a residential project, you may find that you need to apply TAB, Retro-Cx, and HVAC service principles to suc

cessfully resolve an issue!

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