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Thread: Replacing an 22 year old NG heater. Go Heat Pump vs NG?

  1. Back To Top    #1

    Join Date
    Jun 2012
    Boston, MA

    Replacing an 22 year old NG heater. Go Heat Pump vs NG?

    Hi, I just discovered this website and I am wondering if you wonderful people can give me some guidance. I have read all of the posts so far on making the decision about whether to go heat pump vs. gas for a heating solution, but couldn't find a situation which quite fit mine. I have a natural gas heater that has given up the ghost after 22 years, so I already have an existing line. I am told that the heat pumps are more efficient and that the new gas heaters are more efficient as well. The existing heater is housed within a pool house, so changing to a heat pump would mean changing to an outside location. I have electrical service to the house, but of course would have to pay a few hundred to have dedicated service for a heat pump.

    I use my pool daily for just myself, 1 hour a day and like to keep it around 85-88 degrees. I put the bubble wrap solar cover on whenever I am not in it. We have an attached spa, but heat it to 103 degrees no more than 3-5 times in a season for a few hours. Currently, I have run the pump and heater at night for about 5 hours. This season, nothing has happened since I can't make up my mind on which option to purchase. On sunny days, I can get a layer of 1.5 ft of 90-95 degree water under the solar blanket. I will continue to use it whichever way I go. I generally use the pool from late May/Early June through mid October.

    I visited a US goverment website that states that heat pumps are more efficient, but when I did the math, using the solar cover, I didn't see a huge savings. I visited Heat Syphon's website and spoke with someone who was going to give me a cost analysis, but never got back to me. has been pretty responsive and states I will have 70% savings, but then that is what they sell. I am attracted to the fact that the heat pumps have longer warranties than the gas heaters do and that they can be environmentally safer, but I am seeing so many conflicting opinions. We are located in the Northeast outside of Boston and get only a few stifling hot days a season and even on those days the heater has run a little at night when it cools down.

    I believe I have been spending about $350/month in gas during the pool heating months.

    I am anxious to make the right decision and get this done so I can start using my pool. So any advice you guys can offer I would really apppreciate!
    40,000 gal Inground, gunite built 1990, Natural Gas Anthony Heater 350.000btu (original equipment, not working), AquaRite Salt Chlorine Generator; Hayward 1.5 hp pump; 1100 sq ft surface area; 3 hours direct sunlight/day; otherwise filtered; "bubblewrap" solar cover in use 23 out of 24 hours per day; Maintain temp at 87-88 degrees; Pool season late May through mid October.

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    JasonLion's Avatar
    Join Date
    May 2007
    Silver Spring, MD

    Re: Replacing an 22 year old NG heater. Go Heat Pump vs NG?

    In your area, if you really maintain the temperature all the time, a heat pump will be more efficient. Heat pumps get marginal that far north in the early spring and late fall, but are ideal for maintaining temperature mid-season.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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