Heat Pumps and Furnace Installations - http://www.hvacmechanic.com/ Forums
Original message
| rmclmiller
 |  "Heat Pumps and Furnace Installations"
, posted Sat 28 Jun 14:34  
We are checking on Lennox heat pumps and furnaces. The
contractor says that a heat pump will work to approximately
32 degrees and then be shut down and our furnace will
kick on.
My questions are:
1. Does anyone have comments about Lennox brands in general?
2. Is a 13 seer heat pump considered appropriate for a
basic residential home?
3. If we purchase a 95% effecient furnace with the
two speed blower, will the heat pump require the lower
or higher setting for the fan on the furnace? If the
higher speed is required to be used for the heat pump
will we realize any cost savings by putting in the
higher effeciency furnace (when using heat pump only).
Hope these questions make sense. Thanks everyone for
any light you can shed on these questions as heat pumps
are an entirely new thing for me.
rm
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Replies:
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| yuri
| "Re(1):Heat Pumps and Furnace Installations" , posted Sat 28 Jun 15:50
1) I have serviced/sold Lennox and other brands for 30 yrs and they are one of the top brands
2) The SEER rating is a rating for how efficient it is/how much energy it uses. The higher the SEER the more efficient/less power $$ it uses. In the long run a 16 SEER or higher would be better.
3)The speed of the fan motor is not important, the type of motor is. I would buy a furnace that has an ECM variable speed motor like the Lennox G61V or G71MPP. That motor when run continuously for air circulation only uses 80 watts of power instead of 300 or more that a regular motor uses. It adds 1 SEER to your unit.
Yuri
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| | rmclmiller
| "Re(2):Heat Pumps and Furnace Installations" , posted Sun 29 Jun 21:53
Yuri:
Thanks a bunch for the info. Another question......
The contractor we are speaking with also has
mentioned a plenum heater MANY times in
conjunction with the heat pump and new furnace.
He feels that we would realize the biggest
cost savings because the plenum heater would
allow the heat pump to run at lower outside temps.
However, this adds another $1396 to the bill.
We are already choking on the total price
for the new furnace and heat pump. Plus
our power to our home must be upgraded (not
cheap)......
Any thoughts on the best way to go? One thing
I failed to mention in my original email was
that we use propane as we are out in the
middle of nowhere.
Thanks again!
rm
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