"There is not a "Reply" button on the last post. So I came back up to this post since it contains the statements about theory vs data not matching means keep the data and get a new theory.
Attached are two pictures showing mold growth in…"
"I hate beating a dead horse but -
Quoting "...very near it the humidity is going to be close to 100%, but as the air moves away from the coil the humidity is going to drop considerably and will very quickly be above the dew point."
"I'm not even sure how to address that comment.
First - If we are talking about the "condenser" (sic) then we are talking the outdoor unit of an air conditioner or a heat pump in heating mode. Neither of which will condense water from…"
"I agree the air is saturated because the temperature is at the dew point. The "amount of moisture" is irrelevant - the air is saturated. At a 55 degree dew point there is plenty of moisture to wet the inside of the ducts. Any condensation…"
"There is some good info in that article but there are also errors. I give the author credit - I think he is reporting accurately on his experience. However, in most humid climates the air leaving the cooling coil is saturated and may keep the…"
"Depends on the insulation. Batt insulation I would not expect much to be drawn in. Cellulose insulation would likely restrict the leakage to where my theory does not work. Blown in fiberglass could draw in some insulation but it might be a very…"
"I am guessing based on what you posted. I suspect the fan collar to exhaust duct is leaking. If my guess is correct, the fan is acting like an "ejector pump". as the airflow passes the leaking collar it pulls in more air thru the leak.…"
"First the problems - increased CO due to poor combustion, flue condensation delayed ignition, etc. Many potential safety issues.
The plumbing and mechanical code books show a method to size gas lines.The method assumes ALL combustion appliance are…"
"Nate - I agree with you. If you want to "sell", talk about comfort. People will buy comfort. People are suspicious of energy savings or payback claims. But if you tell the client they are looking at a 50 to 250 year payback, most of them…"
"Hmm. I asked a direct question and got a question in return.
To answer your questions -
Closing ratio is almost 100%. We don't "sell" our services. Our customers come to us when they know they have a problem and need a…"
"David's comment is spot on. I would always prefer thermostat staging control over furnace staging control. (I am assuming the thermostat is making and breaking the control call for heating - not communicating the temperature back to the furnace…"
"Thanks everyone for all the info! This has been VERY helpful.
I have been reading how multi-point tests are LESS accurate than single point tests in high winds. I would not have expected that. Then it occurred to me that the single point test has no…"
"I found this post thru a Google search. I was already a member and have posted a few times.
I am a mechanical engineer who has been doing blower door tests for decades. I only do 10 to 15 BD test per year (I am not doing energy audits or such).I am…"
"Rather than recommend an ERV, how about some thru wall exhaust fan(s) in the bath room(s)? Put them on timers so they don't run all the time.
That kitchen fan REALLY needs to exhaust outside. I would make that a higher priority than the…"
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