Click here to Find a Contractor in your area.
In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Need to contact us? Visit https://heatinghelp.com/contact-us/.

Flu gas condensate

tonelow54tonelow54 Posts: 4Member
Recently installed 5 in chimney liner that's venting 60,000 btu furnace and 40,000 hot water tank
Condensation is forming inside of liner and dripping into furnace should I insulate flu liner ?

Comments

  • Paul SPaul S Posts: 1,257Member
    edited May 2016
    Did you perform a combustion analysis? What type of furnace? Is the chimney on an outside wall?
    ASM Mechanical Company
    Located in Staten Island NY
    Servicing all 5 boroughs of NYC.
    347-692-4777
    [email protected]
    ASMHVACNYC.COM
    https://heatinghelp.com/find-a-contractor/detail/asm-mechanical-company
  • Stephen MinnichStephen Minnich Posts: 1,901Member
    This question is not intended to insult you but we've all seen some strange installations to say the least so I have to ask. What is the AFUE rating of the furnace?
    Stephen Minnich
    Minnich Mechanical Design
    708-305-5748
    www.minnichmech.com
  • tonelow54tonelow54 Posts: 4Member
    It's a brand new ducane 80 percent furnace , did not do a combustion analysis due to the age , and chimney is in center of house
  • Paul SPaul S Posts: 1,257Member
    edited May 2016
    Combustion analysis shouldve been done at start up with gas pressure test.....any more info you can give us will help....is there a chimney cap?go back perform a combustion analysis stack temp could be too low....gas press out of adjustment etc
    ASM Mechanical Company
    Located in Staten Island NY
    Servicing all 5 boroughs of NYC.
    347-692-4777
    [email protected]
    ASMHVACNYC.COM
    https://heatinghelp.com/find-a-contractor/detail/asm-mechanical-company
  • tonelow54tonelow54 Posts: 4Member
    thanks for the advice will do combustion analysis , and yes there is a chimney cap will update after performed
  • MikeSpeed6030MikeSpeed6030 Posts: 69Member
    edited May 2016
    Condensation can be caused by replacing an older boiler or forced air furnace with one that is more efficient. Wringing additional heat out of the combustion process reduces the flue temperature. But, if your new unit is 80% efficiency, that doesn't seem to be the likely cause. Can you link us to the manufacturer's specs for your model?

    It's possible that the excess air is off - but a combustion analysis would tell.
Sign In or Register to comment.

Welcome

It looks like you're new here. If you want to get involved, click one of these buttons!