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  1. Replies
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    I agree with the last posts regarding the...

    I agree with the last posts regarding the returns not being sealed. Another possibility is building leakage around things like can lights, electrical boxes, exhaust fan enclosures...etc. If there...
  2. There is no need for the return in there unless...

    There is no need for the return in there unless someone put it there because your ductwork is undersized and it needed the extra air. There are better ways to address that.

    You did not mention...
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    Block off the exhaust - not the intake pipe. ...

    Block off the exhaust - not the intake pipe.

    Good call on closing registers to increase SP

    A combustion analyzer (if you are using it to see if there is an O2 change when the blower comes on)...
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    My 2000 sq ft house has a cooling load of 1.5...

    My 2000 sq ft house has a cooling load of 1.5 tons - you are not going to get a return call if you ROT a 3.5 to 4 ton price at me. Just sayin.....

    I get the whole "quote over the phone" thing for...
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    If it is truly power vented, then the termination...

    If it is truly power vented, then the termination should not make a difference but then it would also not make much sense that the problem started after re-roofing. Type B vent is also not the...
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    2,229

    Strictly speaking from the combustion heating...

    Strictly speaking from the combustion heating side - I remember quite a while back there was some testing done and conclusions made. I was told years ago that you could save 1%/degree/8hrs. Set...
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    It is not uncommon to have pressures in the...

    It is not uncommon to have pressures in the building that are negative with reference to the outside when an air handler is operating. Could be due to duct leaks or door closure issues. So it is...
  8. Loonie and Heybob are correct. THe unit has to...

    Loonie and Heybob are correct. THe unit has to be rated for mobile home use. The Carrier unit needs to be modified to handle the high static duct system. Modular and manufactured housing are...
  9. Thread: lawyer joke?

    by 7X
    Replies
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    1,184

    Why can't lawyers use Viagra? Makes 'em too...

    Why can't lawyers use Viagra?

    Makes 'em too tall.
  10. Replies
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    5,174

    swnoel - I agree and wish you well.

    swnoel - I agree and wish you well.
  11. Replies
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    5,174

    Wptski posted: "A bit off topic but my sister...

    Wptski posted:

    "A bit off topic but my sister was getting headaches and finally figured out that they only came after doing her laundry! The furnace, water heater and dryer are all gas in that...
  12. Replies
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    No, the codes didn't change. I have an AGA...

    No, the codes didn't change. I have an AGA publication from (I believe) 1990 that details the changes in the furnaces and addresses changes in venting, including tables. Venting instructions were...
  13. I think much of what has been said is valid. I...

    I think much of what has been said is valid. I am just going to summarize some of it. Condensation on the windows is a function of the temp of the windows and the amount of moisture in the house. ...
  14. Replies
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    2,188

    High vent temp and low air temp rise? Is the...

    High vent temp and low air temp rise? Is the inside of the heat exchanger sooted up?
  15. Replies
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    666

    A couple things to look at might be duct leakage...

    A couple things to look at might be duct leakage and proper air flow. Kind of hard to tell if the insulation is proper with a blower door. IR camera would be better.
  16. Thread: dye test kit

    by 7X
    Replies
    4
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    1,021

    Be aware that this test has some limitations -...

    Be aware that this test has some limitations - seeing past the first bend on a tubular heat exanger...etc. Also need to consider heat exchanger construction. Some heat exchangers are built with an...
  17. Thread: dye test kit

    by 7X
    Replies
    4
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    1,021

    http://www.visibledefects.com Out of Missouri...

    http://www.visibledefects.com

    Out of Missouri I think.
  18. I'm with Loonie on duct issues and air flow. ...

    I'm with Loonie on duct issues and air flow. Make sure there are no leaks - particularly from the garage. The air flow thing is huge - if the furnace is cycling on the limit switch, that could...
  19. Thread: furnace question??

    by 7X
    Replies
    164
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    8,960

    Tchntch mentioned durability - that's something...

    Tchntch mentioned durability - that's something that I don't think is being talked about enough in this discussion. While the properly sized furnace should run all the time at design temp, it does...
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    Yes, it's possible you could have had an...

    Yes, it's possible you could have had an intermittent problem with the mixing valve. If it happens again, I would have it serviced.
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    Good thought on the dip tube. The reason I asked...

    Good thought on the dip tube. The reason I asked about the instantaneous heater is because I was wondering why you have a mixing valve in the first place. Is it really necessary with your system?
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    Is this an instantaneous heater? If you are...

    Is this an instantaneous heater? If you are somewhat mechanical, maybe you can feel the pipe going to the mixing valve from the tank. If it is always nice and hot and the water coming out of the...
  23. Thread: furnace question??

    by 7X
    Replies
    164
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    8,960

    This has been a pretty entertaining thread. ...

    This has been a pretty entertaining thread.

    Trane, thanks for summarizing what appears to be the latest point of contention. It is always a good idea to point out where we agree versus disagree. ...
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    My vote is for electric backup also. I am not a...

    My vote is for electric backup also. I am not a big fan of propane appliances installed below grade. The thought I had was to find out if your electric utility will give a rebate for going all...
  25. Thread: furnace question??

    by 7X
    Replies
    164
    Views
    8,960

    Maybe Deejoe is approaching this from a job...

    Maybe Deejoe is approaching this from a job security perspective. Two six minute cycles at ten degrees outside? (Doesn't seem like a very real world example - must not run at all when its fifty...
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