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  1. #1
    Join Date
    Oct 2005
    Location
    Hockessin,DE
    Posts
    88
    hello all:

    my current consensus configuration:
    80% AFUE standard 90000 btu gas furnace and a 10 SEER 3ton outdoor unit - pending a full load calc.

    I've decided that the 90% unit is out because for the cost to upgrade to a 90% (about $600 more) I could get a heat-pump (about $450 more) and save more on the total energy bill.

    Any thoughts on what the cost savings would be with a heat-pump in a moderately cold area like Delaware?

    also - does the fact that I'm using a heat pump for the 40F to 60F mean that the unit will run longer and it'll be more compfortable than the same job being done instead by the gas furnace?

    thanks in advance....

  2. #2
    Join Date
    Jan 2003
    Posts
    243
    I would think that the furance will be more comfortable because it will be two stage. On the lower stage (normal operation) it will be lower BTU. Overall the heatpump may save on the heating cost but it is hard to know if and how much. It depends on outdoor temps, gas rates, and electric rates.

  3. #3
    Join Date
    Mar 2004
    Posts
    1,042
    A heat pump can be of great benefit in just about any climate where heating is required. In milder climates, it can run straight through the winter. In really cold climates, it handles the spring and fall heating and another system handles the real winter.

    It's hard to know how much you might save without knowing your electric rates, though. Got any info to share in that regard?

  4. #4
    Join Date
    Mar 2003
    Location
    PA/DE area
    Posts
    1,535
    DELMARVA gives you a break on the power with a heat pump,you could get a lower AFUE heater because it would be back up only. I would say a variable speed furnace 2 stage would make home more comfortable than 90 1 stage.
    It's NOT the BRAND,it's the company that installs it!!!!!

  5. #5
    Join Date
    May 2000
    Location
    Indianapolis, IN, USA
    Posts
    34,109
    Dual fuel is 2 stage. Low BTU heat pump runs in mild weather, gas runs full blast in cold weather. And in most cases will cost quite a bit less to heat with than a 2 stage gas furnace.

  6. #6
    Join Date
    Oct 2005
    Location
    Hockessin,DE
    Posts
    88

    Utility rates in DE

    Electric
    Distribution : $0.029040 per kWh
    Supply: $0.055870 per kWh
    Transmission: $0.007884

    Gas:
    Distribution: $0.358170 per ccf
    Supply: $0.859170
    Env. Surcharge: $0.000830

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