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Posted by IlBeBauck@gmail.com on July 3, 2009, 1:49 pm
On Jul 3, 7:12=A0am, letter...@invalid.com wrote:
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> I'm replacing an old oil furnace due to a basement flood. =A0I'm putting
> in a gas furnace instead and looking for a used one because I can not
> afford a new one. =A0I was offerred a used high efficiency furnace that
> was removed from a building being demolished. =A0It's complete with the
> sheet metal. =A0
> I have installed several of the older standard gas furnaces, but have
> never even touched a high efficiency one. =A0Aside from running the pvc
> inlet and exhaust pipes outside rather than using a chimney, is there
> any differences or special concerns about installing a high eff. type?
> Thanks
In addition to the other tips....once the system is up and running,
set the blower speed to be within the temperature rise range listed on
the furnace sticker . When you install the exhaust and intake PVC
Piping pitch it at least a 1/2" per 10' length toward the furnace so
the condensate will run back to the furnace mounted condensate trap,
make sure the condensate from the furnace and Piping is trapped with
water before starting up, and when youre running the PVC
pipes....rough-up all pipe ends and fittings and use PVC Cleaner
before applying the PVC Cement ; this is important so you get the
strongest leakfree joint possible since youre dealing with CO . At
the termination point outside (for the Pipes), dont allow the exhaust
gas to go into the intake pipe --- seperate them by at least 15"
pointing in opposite directions. Also be at least 15" above the
ground if you live in a snowy area and be 4' away from any windows and
doors with your Pipe terminations. Seal around the pipes that come
thru the outside wall.
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> in a gas furnace instead and looking for a used one because I can not
> afford a new one. =A0I was offerred a used high efficiency furnace that
> was removed from a building being demolished. =A0It's complete with the
> sheet metal. =A0
> I have installed several of the older standard gas furnaces, but have
> never even touched a high efficiency one. =A0Aside from running the pvc
> inlet and exhaust pipes outside rather than using a chimney, is there
> any differences or special concerns about installing a high eff. type?
> Thanks