Results 1 to 5 of 5

Hybrid View

  1. #1

    question about heat pump electricity consumption

    my gibson 4ton 13seer heat pump outdoor unit label said total current 23.3A, RLA 21.76A, outdoor fan 1.4A, indoor blower 8A, the installer clamped a device on the black #10 wire and told me outdoor unit draws about 16 to 17amp when running.

    in last week or two, outside temperature at night min 18 to 20F, daytime max 32 to 35F here in chester county PA
    i've been recording the electricity meter, actual and average rolling about 50 to 60 k watt per day, with other home electronic, and electric cloth dryer (2 or 3 load per week).
    my homedepot 3m50 thermostat registered about 10 to 12 hours of heat pump runtime per day, keeping indoor 70F
    i can see heat pump runs 15 minutes, then idle another 20 minutes, except when defrost at below 25F at night time, compressor ran longest for 50 minutes with defrost.

    my electric rate is 16 cent per k watt.
    60k watt X 16 cent/k watt = $9.60 per day for below freezing outdoor temperature heating and other electricity consumptions.

    by the way, my last propane refill was $255 for 105 gallons at $2.449/gallon, maybe 2 to 3 weeks of propane furnace usage.
    i disabled the heat pump and switched to propane furnace when in around week of Jan 22nd 2013, the outdoor temperature were in low as single and teen F.

    if i were to keep running the heat pump below theory balance point, and the compressor were to run 24 hours non stop with defrost.
    is it true that heat pump will cost me about 64 cent per hour? or $15.36 max per day, if it can keep up the warmth? and still cheaper than to run propane 80k btu 92% furnace?

  2. #2
    Join Date
    Jan 2005
    Location
    southeast
    Posts
    83
    Your the one to tell us what you get. You seem to have a handle on this.
    You don't beleve what the equipitment ratings are.

    Now Do you understand Power Factor as it applies to what your paying for ??????

  3. #3
    Join Date
    Nov 2004
    Location
    SW FL
    Posts
    6,245

    Smile Heat Pump Advantage over Propane

    Specs are in the attached PDF for a GIBSON 13 SEER Heat Pump
    At 17'F / 40'F, propane cost _ 70% / 93% more _ to operate than the heat pump.
    $0.16 /kW is quite High. ( National Average = ~ $0.117 )

    Propane at $2.44 per gallon, 92,000 BTU per hr , 90% efficiency
    = $ 3.08 / therm


    F __ Ht Pump COP ______ $ / Therm ______ Prop vs Ht Pump 0.16 $/ kW
    40 _ 45,300 3.16 ______ $1.484 ______ 2.075
    30 _ 38,800 2.94 ______ $1.595 ______ 1.931 __ 100000 BTU per hr/ Therm
    20 _ 32,200 2.67 ______ $1.756 ______ 1.754 __ 3412 BTU perhr / kW
    17 _ 30,300 2.59 ______ $1.811 ______ 1.701 __ 29.308 KW/ Therm
    10 _ 25,700 2.35 ______ $1.995 ______ 1.543 __ $4.689 $/ Therm Straight Electric
    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

  4. #4
    ok, thanks for calculation
    here is my last month PECO bill in regard to electricity rate
    Name:  peco bill.png
Views: 383
Size:  51.5 KB

  5. #5
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    67,760
    Wow. You never turn on any lights in your house.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event