"Kristoff Irwin had an episode on his Positive Energy podcast about this. He interviewed a guy with the epa (i believe) who is also doing his own research actively on larger systems.
Basically yes it does help but sometimes the cleaning can be…"
"If you are going for just a good system I would stick w the 3pascal limit and would aim for less. Any air not returning to the system from each room will be gained from elsewhere. Most likely outside air, adding load as well. Personally I would test…"
"South Wall. It will have the highest load needed for cooling/heating. the shade from the tree could help the outdoor unit operate more efficiently in the summer.
Look into a mini split with a sensor for hot/cool spots. It will direct airflow to…"
And I would have a system check on the 1st floor 1.5 ton unit to make sure it is performing up to spec. Then look to see if the system was sized right. If its a day care you might have a higher temp load on the system during the…"
"Running a ceiling fan actually heats up air. Allison Bailes has some great articles on it. I would set fans to slowest speed if you are having issues with the mini splits distributing air throughout the room. Otherwise you might be making them…"
"Where are the supply runs located? Look to make sure supply runs are sealed. I would second having a contractor make a filter rack and use cheap fiberglass filters. Ones that look like plastic strands dribbled over each other. It will be less…"
"Oversized A/C systems wont pull out enough moisture from the conditioned air. I would check to make sure the systems are set to the right fan speed. Make sure the filters are clean and appropriate for the filter rack. No merv 12 in a 1inch filter…"
"Sounds like u opened the hornets nest! I would say a 2600 sq ft home shouldn't need more than 2tons a/c depending where u are at. More tonnage can cause issues. Especially makes it difficult for the system to pull moisture out of the air of it…"
"Looks fun. How did you connect all the fans together or did you adjust the flows manually? The reverse set up is neat. Are you pressurizing or depressurizing? Did you take your reference or input pa from inside? so many questions!"
"I would look to stop air from penetrating the ceiling. I would guess hot air is able to rise through penetrations in the ceiling or the ceiling itself, washing batt insulation. If you are going to remove the roof and use closed cell foam it will fix…"
"Spray closed cell foam and get rid of soffit venting.
Problem fixed! Adding soffit vents just allowed hot moist air to hit, I assume, an underinsulated and non air sealed space. Doubt they actually vented the space with baffels all the way up the…"
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