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  1. #14
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    8,687
    Post Likes
    AnyOne, myself included, may expect their car to last nearly 21 years.
    [ Very realistic for anyone driving their car < 8,000 miles / year &
    adhering to good maintenance practices.]

    However, there may be several hours or days it may be out-of-service
    due to normal [ oil change, tires, air filter, spark plugs, low tire pressure, … ]
    or unanticipated maintenance [ circuit boards, relay, dent repair, etc, ] along the way.
    My BACK-UP SOURCE is Either my bicycle Or
    neighbor's assistance because I 'paid-it-forward'
    depending on thee weather.

    Similarly, one should expect
    heat pump or A/C condenser START & RUN capacitors WILL require a replacement in 2 to 6 years.
    I don't know if repairs turn out to be a Scheduled or an unanticipated event.
    Therefore, a ~100 dollar small back-up electric strip will provide 'automatic' interim
    [ 1 hour or 3 days (event happens Friday at 6 pm) ] heating.

    Also, One may expect to address a Furnace Heat Exchanger issue in < 21 years.

    I would opt for a heat pump with an operating cost savings of
    > $30,000 in comparison to a propane furnace
    over the next 2 decades.
    Designer Dan
    It's Not Rocket Science, But It is SCIENCE with "Some Art". ___ ___ K EEP I T S IMPLE & S INCERE

    Define the Building Envelope and Perform a Detailed Load Calc: It's ALL About Windows and Make-up Air Requirements. Know Your Equipment Capabilities

  2. #15
    Join Date
    Jan 2014
    Location
    New England
    Posts
    4,439
    Post Likes
    Quote Originally Posted by Ternkiem View Post
    It’s brand new!
    I don’t expect it to fail.
    If I did then I wouldn’t have it put in!
    We removed the wood stove long ago because of the propane furnace (which has been our sole heat source for 21 years).
    I fully expect the heat pump to last at least that long without failure.

    If you, as a professional, feel this is unrealistic please...tell me now so I can cancel the install and just replace the furnace!!!!
    A Heat Pump has quite a few more parts to fail than a standard 80% furnace. The furnace sits indoors away from the elements unlike a HP. What about defrost, as while your in defrost your in A/C mode for a few minutes. Your supply air temperature can easily drop into the 40's without a strip of electric heat to help temper the discharge air temperature. I seriously doubt you'll never have a lick of problems for 20+ years. Parts alone are made cheaply nowadays. They don't have the longevity as the old days, plus more functioning parts in a HP than a standard no frill furnace.

    You'll potentially have rodents living in the outdoor unit, urinating/feces dropping, eating wires, OD unit exposed to your weather. Potential leaking coils. A furnace only runs to heat, all the other months it sits idle away from the elements, whereas the much more complicated more parts HP runs much more, for wear and tear as it heats and cools. Can't compare the longevity of the two.

    There's a lot of things going on during defrost alone. Instant reversal of refrigerant flow direction, reversing valve energizing/deenergizing. Outdoor fan shut off then come on. Sensors working to monitor frost accumulation, feeding to a mother board.

    If you really want a HP strongly suggest a back up electric heat package sized closely to handle total load of residence when HP failure. Break up the heater package so only a part of it is used during defrost.

  3. #16
    Join Date
    Sep 2018
    Posts
    7
    Post Likes
    Thread Starter
    $125/mo. Give or rake a few bucks.
    Current electric bill avg. $42.

  4. #17
    Join Date
    Sep 2018
    Posts
    7
    Post Likes
    Thread Starter
    Well... have the HP installed now.

    I am impressed with the way it works (of course...it’s new) but I am concerned about the run time. The fan on this thing runs ALL THE TIME!
    My installer has that it is supposed to and is operating normally to keep the temperature constant and it will do this in whatever mode we put it in (auto, heat, dry, or cool...we will most likely only use the heat or auto mode).
    As a back up we decided to keep the fireplace...at least for the next few years anyway.

    Maybe one of you knowledgeable folks can chime in here and tell me if this is true?

  5. #18
    Join Date
    Jan 2014
    Location
    New England
    Posts
    4,439
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    Guessing they did not mention the sequence of operation to you beforehand?

    I'm sure it can be cycled off ( blower ) if you wanted. That's what the labor warranty is for, to twick the system to customer satisfaction.

  6. #19
    Join Date
    Sep 2018
    Posts
    7
    Post Likes
    Thread Starter
    Quote Originally Posted by Bazooka Joey View Post
    Guessing they did not mention the sequence of operation to you beforehand?

    I'm sure it can be cycled off ( blower ) if you wanted. That's what the labor warranty is for, to twick the system to customer satisfaction.

    No...they handed me an owners manual and told me to play with it and get used to it, then they’d be back in a week or so.

  7. #20
    Join Date
    Jan 2014
    Location
    New England
    Posts
    4,439
    Post Likes
    When they installed the system and did the final field refrigerant charge ( typically in cool mode ) if the OD temperature was below what the manufacturer minimum wants then they would need to return on a warmer day to do a final field refrigerant charge. Heat Pumps are critically charged system to get the optimal performance. Of course correct ductwork size, static pressure, etc. plays into the correct set up.

    I would ask them for the commissioning report which should have info like the static pressure across ID coil, amprege draw of compressor, fan motors, subcooling number, refrigerant pressures, checking defrost operation etc. etc. to keep them somewhat honest...

  8. #21
    Join Date
    May 2006
    Location
    Philadelphia, PA
    Posts
    1,939
    Post Likes
    What brand and model was installed?
    Climate Control Solutions for your Home or Office

    Serving Northeast Philadelphia and Surrounding Areas

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