Glenn:
When working on sizing furnaces, you want to know both the input and output
BTU ratings. The later number is always less and is normally found listed
on a data plate on the unit. You can then calculate efficiency. However,
the output number is what you want to know.
In addition, compare the output BTU numbers. Normally, with time they have
increased. So if the original 30K Btu rated furnace had 20K Btu output,
perhaps today's 24K unit will now suffice.
Paul Bartz
From: Gplymate [mailto:Gplymate]
Sent: Wednesday, October 13, 1999 12:30 PM
Rick,
Many thanks for the energy analyses on the Suburban Furnace options. You
made a real good case for not going for the 34,000 BTU model, so that option
has been scrubbed. We're making progress on the decision.
Now, it's
just down to deciding between the 30K and 24K units.
I'm still inclined to go with the 30,000 BTU model since that's the size GM
used when they built the coach. Wish I knew all their reasons. Don't know
if I want to experiment with a 24,000 BTU model. Even if we never go to
Fairbanks in the winter, it still gets chilly here in the northwest.
The old Duo-Therm's nameplate says it uses 8.5 amps, so a new Suburban will
be quite a step up in energy savings with the same BTU rating, plus I
suspect
it will be a tad bit more efficient for BTU output. Don't know, it's just a
feeling, but it seems it outta be a little more efficient than a 20+ year
old
design. For sure, it's better in the electrical department.
Thanks again, Rick, for the calculations. They are much appreciated and
helpful.
Winter's coming, so gotta get that furnace in. Got two more days before the
sale ends to make up my mind... and shell out some bucks.
Anyone else for comments? Particularly, from anyone that has replaced
their
furnace? It'd be especially nice to hear from someone that's been there,
done that.
Glenn
78 Kingsley
Independence, OR
When working on sizing furnaces, you want to know both the input and output
BTU ratings. The later number is always less and is normally found listed
on a data plate on the unit. You can then calculate efficiency. However,
the output number is what you want to know.
In addition, compare the output BTU numbers. Normally, with time they have
increased. So if the original 30K Btu rated furnace had 20K Btu output,
perhaps today's 24K unit will now suffice.
Paul Bartz
From: Gplymate [mailto:Gplymate]
Sent: Wednesday, October 13, 1999 12:30 PM
Rick,
Many thanks for the energy analyses on the Suburban Furnace options. You
made a real good case for not going for the 34,000 BTU model, so that option
has been scrubbed. We're making progress on the decision.
Now, it's just down to deciding between the 30K and 24K units.
I'm still inclined to go with the 30,000 BTU model since that's the size GM
used when they built the coach. Wish I knew all their reasons. Don't know
if I want to experiment with a 24,000 BTU model. Even if we never go to
Fairbanks in the winter, it still gets chilly here in the northwest.
The old Duo-Therm's nameplate says it uses 8.5 amps, so a new Suburban will
be quite a step up in energy savings with the same BTU rating, plus I
suspect
it will be a tad bit more efficient for BTU output. Don't know, it's just a
feeling, but it seems it outta be a little more efficient than a 20+ year
old
design. For sure, it's better in the electrical department.
Thanks again, Rick, for the calculations. They are much appreciated and
helpful.
Winter's coming, so gotta get that furnace in. Got two more days before the
sale ends to make up my mind... and shell out some bucks.
Anyone else for comments? Particularly, from anyone that has replaced
their
furnace? It'd be especially nice to hear from someone that's been there,
done that.
Glenn
78 Kingsley
Independence, OR
