Other then complying with SWS 6.6201.3a (No room will exceed +/- 3 pascals with reference to the outside with all interior doors closed and ventilation systems running) is anyone measuring room…Continue
"Mark -- you are right I should not have said never. The only walls that I have seen that do not leak to the exterior are houses built with airtight drywall. Since you have not seen leakage from interior walls I wonder why you seal at the top…"
"I have never seen an inside wall that did not leak to the exterior."
I have noticed some top plate leakage at a handful of walls in some homes but certainly not enough to make a blanket statement about "all" walls. I…"
"Next time you final a new house or complete a home energy audit: Tape off the return in one bedroom. Then turn turn AH on - heat or cool. Now place the manual damper (*aka door") to about 4 inches from…"
"Leakage, yes, but to where? The interior? These are only run in interior walls (exteriors have to be ducted) and, generally they work just fine unless they have the installation problems I mentioned above. Plus, the contractors are much getting…"
"Daniel wrote: "Any air not returning to the system from each room will be gained from elsewhere."
Not necessarily. Notwithstanding combustion safety testing (which predates green building programs), zonal pressure testing is an important…"
"The Weatherization Assistance Program Standard Work Specifications vary state to state. I suggest contacting your state office for clarification. I would want to know how they define ventilation systems. Does this include exhaust fans,…"
"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…"
"We test for the Weatherization Assistance Program. But the Standard Work Specifications and the BPI 1200 -s-2017 no longer require or mention testing room pressures except for SWS 6.6201.3a (No room will exceed +/- 3 pascals with reference to…"
"Yes...this test should be done at the highest fan speed (without messing with the installer's speed tap settings) with all bedroom doors closed. With air handlers that have different speed settings for heat vs. cool, you should choose the…"
"Since the specification you are quoting (?) specifies ventilation system and all interior doors closed and with reference to outside, one can would deduce it is there to test for an imbalance in flows from the ventilation system. If it across the…"
Welcome to Home Energy Pros Forum. Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you!