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Old 10-31-2011, 03:05 PM   #16
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Slantfin Galaxy Boiler Pressure Mystery


I was quoted $300 parts/labor to replace the gauge on my boiler and they recommended a 4 inch fresh air intake be installed at the cost of $650 due to the fact that over the weekend the backdraft sensor on the flue or whatever it's called tripped probably because of some negative pressure issues. Does that seem absurd?


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Old 10-31-2011, 04:59 PM   #17
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Slantfin Galaxy Boiler Pressure Mystery


If they can replace the gauge without draining the boiler, it might be a bit high.

The price to run a fresh air intake sounds reasonable.

Its possible that you always should have had a intake, and the problem is now only starting to show.
You can run the intake yourself.
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Old 11-15-2011, 03:36 PM   #18
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Slantfin Galaxy Boiler Pressure Mystery


I finally keeled over and they are coming tomorrow to do a host of things to my boiler room.

Getting the intake (I guess this house is more air tight than I would have thought for a 1930s double-brick home, but it does have new windows, insulation, doors etc...). I am a bit concerned that the intake is going to spill tons of freezing cold air into my finished basement where I have my office etc. but I will make sure to ask the installer about that. The boiler room is open to the drop ceiling, has vents open on the wall and there is even a floor register almost directly above the boiler room that is just open to below for what I am guessing is to supply air to the enclosed boiler room in some kind of cockeyed attempt at avoiding using a fresh air intake... this whole situation makes me uneasy - why go through these lengths to avoid installing the intake?

Turns out my expansion tank is ruptured which probably contributes to the messed up pressure readings, so that is getting replaced. Of course, the original installer didn't put an isolation valve or drain on the tank so the whole system needs to be drained to replace it. Since the whole system is getting drained anyway I am getting a new gauge installed just in case - I don't want to have to start all over again after if I find out that it really is shot too.

The hopefully last heating related problem I have to have dealt with is the fact that I have now discovered one of the chimney liners (3 inch one, the 4 inch one is still attached) is not attached to the gas insert fireplace firebox and it is too short to even reach it (must have been yanked at some point and unraveled and never fixed). Of course, home depot doesn't have any material that would be suitable to extend the liner a foot they only have thin gauge aluminum dryer duct type stuff which would probably melt. I'm hoping I can tell the hvac guys coming tomorrow to take a look and they'll just have something in the truck they can cement together for me so I can start using the fireplace again without fear.
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Old 11-15-2011, 05:37 PM   #19
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Slantfin Galaxy Boiler Pressure Mystery


The intake can be an to a bucket, and ran down to within 6" of the bottom. Or it can be ran in and then make a J upward. This will tend to reduce the amount of air that comes in when the boiler isn't running.

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