Best Of
Re: New Return Pipe Noise During Renovation
The way that main vent is spewing the pressure seems excessively high, but until you get a gauge on the boiler we'll never know. Excessive pressure can damage some vents.
Seems like with the pipe congestion behind the wall a false water line piping is your best option, explaining it to who gets to do it may be interesting, unless they know steam systems. One example;
https://www.comfort-calc.com/Steam_False_Water_Line.cfm
109A_5
Re: Air to Water Heat Pumps
I think you are missing the point of being in the Heat Geek club:)
If it can be done, it can be over-done
hot_rod
Re: I Want to ADD a 4-wire GVD Vent Damper to Thermopile-powered DHW Hot Water Heater
Hi, How about adding a fan to your dampered air inlet? That would give you much more combustion air. I have a combo unit for my kitchen exhaust that has both fan and motorized damper. Then the thing to be figured out is the control logic, and knowing when to activate it. 🤔
Yours, Larry
Re: Savings ???? Repipe
Paul, it sounds like you are confusing condensate and wet (saturated) steam. If you see water flowing in a steam pipe, it's not wet steam. It's condensate. The water in wet steam is atomized, it's usually seen as a mist in escaping steam. Dry steam is invisible, until it begins to condense.
Reiterating what Ed and I have said, the BTUs that wet steam is incapable of holding and transferring out of the boiler are heating the boiler's iron directly and the basement, along with any other BTUs that exceed the steam's capacity to carry them.
Imagine a dry-firing boiler. The BTU's are making the boiler glow red, but there's not enough steam to transfer them out of the boiler to the radiators. The BTU's aren't lost but they aren't being transferred out of the boiler in any efficient manner. The building's not heating, the BTUs are escaping from the fuel but they aren't travelling in the steam. They're feeding a cherry red piece of iron and the air around it.
Re: Mitsubishi heat pump not keeping up
This has nothing to do with Man J or heat loss. The unit is simply not running properly.
Mitsubishi publishes a correction factor for defrost. It is actually not that much once you get bellow freezing:
@ksm If you can't get hot air out of all heads when cranked, the unit is down on juice. 99% of the time a multi split operating strange is a charge issue.
Kaos
Re: Mitsubishi heat pump not keeping up
Ed, this unit is NAHZ4 not NA3 as you show on the product data sheet. Different unit specs. Here is correct one. Not quite full capacity but much closer than other spec. Again max capacity does have some limitation but can reach it.
Original poster, what’s the od temp at times you’re having problems. Also of course would be necessary to have load calcs of your house. You probably don’t have that.
Re: Savings ???? Repipe
Actually, I prefer to use "more betterer." Even though my fambly calls me "Grammar Man" & "OSHA man" I enjoy using misnomers, malaprops, mixed metaphors to annoy the uptight people...ha ha...Happy Friday....Mad Dog
Re: New Century House with Two Pipe Steam - Questions
that kinda comes from pros where the traps are cheaper than their time to sort out which are good and which are bad
mattmia2
Re: Savings ???? Repipe
Again, the reason we fix boiler piping and skim boilers is to prevent the wet steam that those two problems cause.
If wet steam isn't a problem, why do we insist on fixing these issues?
