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Thread: Lennox Replacement
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10-22-2005, 12:37 PM #1
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No before photos, but this was an upgrade from a 25 y/o draft Lennox to a new 94% Lennox furnace.
Kept existing AC in plenum, added two returns.
The only exterior wall that would work was 20 feet away.
The top block (in the background) was slightly below grade.
The intake is rotated to maintain 3 foot clearance from the gas meter.
The orphaned water heater, and capped off flue from the old furnace.
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10-22-2005, 04:14 PM #2
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Looks good, that venting looks really clean.
What are those copper lines that go to the black pipe?... looks a little confusing
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10-23-2005, 12:17 AM #3
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Is Lennox trying to be a "Trane-wanna-be"? Color sure the same as the Trane, and also the higer SEER unit looks like a Trane at a glance!
I am not sure about the venting outside.. Couldn't you do a 90degree down?.. and the black armaflex?
Otherwise, looks good.
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10-23-2005, 04:27 AM #4
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Looks good, but shouldn't the PVC intake point down?
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10-23-2005, 09:54 AM #5
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The new Lennox equipment looks like it was painted by Earl Scheib.
[Edited by HeyBob on 10-23-2005 at 09:57 AM]
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10-23-2005, 10:29 AM #6
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What is the purpose of the armaflex on the vent pipe? Is that 1/2" gas line sized to feed 4 appliances? Why are there two reguators on the gas supply line? Is the label rolling off of the furnace panel or is that an optical illusion?
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10-23-2005, 03:26 PM #7
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is that some kind of high pressure gas service?
name tag is optical delusion. not a label, its a pretty heavy duty badge that snaps on door panel.
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10-23-2005, 04:41 PM #8
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Looks clean! Couple of complaints. I re-iterate what the guys said about the vent pipe, needs a 90 down on the intake. Also,, is adding a couple returns gonna do anything with only one side of the unit being used? And, I hate copper for gas, could never get away with that here in the west. I know, it was probably existing, but I can still complain about it. And 1 more thing, looks like where you capped off that existing flue it is too close to the new pvc pipe. Those new lennoxes are copying Trane, but they would never admit it.
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10-23-2005, 05:50 PM #9
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lennox factory sidewall termination goes straight out. we have never put any kind of turn down, no problems yet in over 20yrs of doing it.
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10-23-2005, 05:51 PM #10
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exhaust pipe should really be insulated entire length outside.
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10-24-2005, 06:33 AM #11
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Why is Lennox the only manufacturer that requires the vent to be insulated outside? What purpose does this isulation serve?
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10-25-2005, 09:43 AM #12
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not only outside but entire length thru unconditioned space. suppose its to help against freezing
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10-28-2005, 12:13 AM #13
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nice job
If you don't mind me asking, how many man hours did it take for this install? Are you premaking the metal in the shop ore on site?
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