1985 Lennox G803-105-1

[demo-man]

I'm looking for any technical information on an older Lennox forcedair gas furnace, model G803-105-1. Any technical information, schematics, installation info, etc. would be greatly appreciated.

[2hot2coolme]

Looks like a 105K btu furnace.

[pl23]

G80Q-3-105--3Ton drive,105K

[BaldLoonie]

G8 furnace model
Q3 is the 3 ton drive
never seen a 105, usually 100
-1 series #

[tinman101]

105 is the right btu

[amd]

55% to 60% AFUE when new, slightly higher if it has electronic ignition. Up to 70% if a damper was installed.

[operator]

shouldnt that have a split HX on it by now?

[t527ed]

Originally posted by amd
55% to 60% AFUE when new, slightly higher if it has electronic ignition. Up to 70% if a damper was installed.


damper and ignition not even available on G10, doubt they were available on this old beast.

[amd]

Some of the G8s aren't that old; they built them in Canada until '91/92 when the 78% minimum went into effect. The newer ones have electronic ignition - not sure about the damper though.

[t527ed]

damn Amd your right! did not have parts program at home when i said they did not have spark ign. davenet did not show it but parts program does. forgot you guys up there had stuff longer. don't think i have ever seen one made after very early 70s.

[operator]

I see alot from 88/89 and condemn most of them