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Hanging a residential furnance / condenser Puddles 10-04-2006
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Posted by Puddles on October 4, 2006, 7:02 pm
Hi,
First I am not a contractor or HVAC expert.

A year ago I moved into this 10yr old 2100 sq ft. home in the San Jose,
California area.

The furnace is in the attic, laying on its side, sitting on two steel
"feet" about 2 inches above the drain pan.

There are multiple leaks - the worst (feels like 2x the air that comes
out of a register) is on the bottom of the unit along the seam of the
furnace and condenser box. It is impossible to get this seam with a 2"
clearance.

A furnace contractor wants $2100 to raise the furnance, fix the leaks,
and re-attach the drain pipe, etc. The also said that currently the
drain pipe is out of code because the furnance isn't high enough (I am
guessing due to shallow angle of pipe).

I don't mind paying a $100/hr to fix the leaks, and drainage, but it
seems to me hanging the furnance wouldn't be too difficult.

The question is, how do you typically hang a furnance? I would guess
the furnance is 300lbs, and the roof is supported by engineered
trusses. So attaching a 2x6 across the trusses near the roof line
(about 3 ft off the peak), and hanging the furnance 6~8 inches above
the drain pan should work fine, correct? I could also strap it to the
original platform to prevent any swaying.

I am aware I will have to add/change some duct work to prevent kinking,
etc.

My second question is, do you think this is an issue that the home
builder should cover under their warranty (which expires in 2 months)?
The furnance contractor says it was installed incorrectly. I would
appreciate any suggestions that might convince them to at least pay for
1/2 of it without involving lawyers.

Regards,
Puddles


Posted by on October 4, 2006, 8:41 pm
"Puddles" wrote:

>Hi,
>First I am not a contractor or HVAC expert.
>
>A year ago I moved into this 10yr old 2100 sq ft. home in the San Jose,
>California area.
>
>The furnace is in the attic, laying on its side, sitting on two steel
>"feet" about 2 inches above the drain pan.


post the make and model number of the furnace. your furnace may be
one of the ones that are a fire hazard and that there was a major
recall of.

>
>There are multiple leaks - the worst (feels like 2x the air that comes
>out of a register) is on the bottom of the unit along the seam of the
>furnace and condenser box. It is impossible to get this seam with a 2"
>clearance.

2' is plenty of clearance to get a brush taped to a piece of pipe
etc. brush the seam with duct mastic.

>
>A furnace contractor wants $2100 to raise the furnance, fix the leaks,
>and re-attach the drain pipe, etc. The also said that currently the
>drain pipe is out of code because the furnance isn't high enough (I am
>guessing due to shallow angle of pipe).
>
>I don't mind paying a $100/hr to fix the leaks, and drainage, but it
>seems to me hanging the furnance wouldn't be too difficult.

if all a contactor has to sell is his time, expect to pay the
equivelant that a lawyer might charge. I cant think of any contractor
who is interested in selling only his time.
>
>The question is, how do you typically hang a furnance? I would guess
>the furnance is 300lbs, and the roof is supported by engineered
>trusses. So attaching a 2x6 across the trusses near the roof line
>(about 3 ft off the peak), and hanging the furnance 6~8 inches above
>the drain pan should work fine, correct? I could also strap it to the
>original platform to prevent any swaying.

speaking of building codes, you're clueless when it comes to
installing furnaces. You'd risk burning your house down to save
$2100.00?? If drainage is an issue, let the condensate drain into a
pump and pump it to the drain line.

furnaces should be hung using 3/8 all thread and uni-strut. Dont
forget code required seismic restraint. Try not to kink or damage the
refrigerant connections. all metal to metal duct and plenum
connections must have screws and sealed with an approved duct mastic.

>
>I am aware I will have to add/change some duct work to prevent kinking,
>etc.
>
>My second question is, do you think this is an issue that the home
>builder should cover under their warranty (which expires in 2 months)?
>The furnance contractor says it was installed incorrectly. I would
>appreciate any suggestions that might convince them to at least pay for
>1/2 of it without involving lawyers.

sue the homebuilder while you still have a chance.

>
>Regards,
>Puddles


Posted by Bubba on October 5, 2006, 7:46 am

>Hi,
>First I am not a contractor or HVAC expert.
>
Id have never guessed.

>A year ago I moved into this 10yr old 2100 sq ft. home in the San Jose,
>California area.

And what did your wholehouse inspection reveal at the time of
purchase?
>
>The furnace is in the attic, laying on its side, sitting on two steel
>"feet" about 2 inches above the drain pan.
>
>There are multiple leaks - the worst (feels like 2x the air that comes
>out of a register) is on the bottom of the unit along the seam of the
>furnace and condenser box. It is impossible to get this seam with a 2"
>clearance.

Okay, so cheapest bidder won the job. Nothing new there.
>
>A furnace contractor wants $2100 to raise the furnance, fix the leaks,
>and re-attach the drain pipe, etc. The also said that currently the
>drain pipe is out of code because the furnance isn't high enough (I am
>guessing due to shallow angle of pipe).

So what did the other two licensed and insured professional HVAC
contractors tell you about the scope of the job and the price?
>
>I don't mind paying a $100/hr to fix the leaks, and drainage, but it
>seems to me hanging the furnance wouldn't be too difficult.

Then do it yourself and find out how much "fun" we hvac contractors
have up in hot dark attics.
>
>The question is, how do you typically hang a furnance? I would guess
>the furnance is 300lbs, and the roof is supported by engineered
>trusses. So attaching a 2x6 across the trusses near the roof line
>(about 3 ft off the peak), and hanging the furnance 6~8 inches above
>the drain pan should work fine, correct? I could also strap it to the
>original platform to prevent any swaying.

Well, first guess on how to hang it would be to look at that silly
piece of paper that came with the unit called, "Installation
Instructions". If you dont have it, try another silly little feature
called a "google search".
If all else fails, ask "Todd H." He thinks he knows everything.
>
>I am aware I will have to add/change some duct work to prevent kinking,
>etc.
You're a tinman expert now? Damn, you're good.
>
>My second question is, do you think this is an issue that the home
>builder should cover under their warranty (which expires in 2 months)?
>The furnance contractor says it was installed incorrectly. I would
>appreciate any suggestions that might convince them to at least pay for
>1/2 of it without involving lawyers.

Pictures, a second hvac opinion in writing and mention of a lawsuit
might get you some movement. Then on the other hand, it might just get
you a laugh.
Bubba
>
>Regards,
>Puddles

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