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Thread: Heater Efficiency

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    setsailsoon's Avatar
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    Oct 2015
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    Heater Efficiency

    Folks,

    I'm very new to "modern pools" and I'm looking to add a natural gas heater. Gas line was installed to the pad with a regulator at the pad. I'd like to consider Jandy JXi or LXi but I can't find anything about the LXi efficiency. Is there a site that lists this info?

    Any help for this newbie would be most appreciated.
    -Chris-
    2013 In-ground plaster/pebble, screen enclosed, 12000 gal w/ Jandy 2 speed 1 HP pump, Jandy CS 200 cartridge filter, 800 gal spa w/ 1.5 HP booster pump, Solar heater, 2 LED lights in pool 1 light in spa, TF-100 test kit, The PoolCleaner Next Generation, Jandy RS-12 Automation system with iAqualink 2.0 control, Separate Hayward/Goldline Solar control

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    Join Date
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    San Rafael, CA USA
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    Re: Heater Efficiency

    Welcome to TFP!

    According to this government website:

    New gas swimming pool heaters have a standard test they go through to determine their energy efficiency based on their Btu (British thermal unit) output.

    Heater efficiency is the ratio of usable output to energy input. For example, an 80%-efficient heater uses $80 worth of useful heat for every $100 worth of fuel. Therefore, it wastes 20% of the fuel.

    Most gas pool heaters feature their efficiency percentage on their nameplates. A pool heater's manufacturer can also provide its efficiency percentage.
    However, when I look at the specifications and documents for the Jandy LXi heaters, I see nothing about efficiency measurements. Heater Review Sites seem to only mention specific efficiencies when they are listed explicitly by the manufacturer on their website or documentation.

    So unfortunately you may need to directly contact the manufacturer and ask them for the efficiency ratings for their gas heater models. What a PITA.

    The Jandy Pool Heater Cost Calculator does show for each model the "BTU Output of Heater Selected" which for the LXi models they are the following:

    Model . Presumed Input . Output . Efficiency
    LXi 250 ...... 250,000 ....... 200,000 ..... 80%
    LXi 300 ...... 300,000 ....... 240,000 ..... 80%
    LXi 400 ...... 400,000 ....... 340,000 ..... 85%

    The LRz line similarly has 80% efficiency across the board (even for the LRz 400). It is the Hi-E2 line that has 95% efficiency.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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    ps0303's Avatar
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    Re: Heater Efficiency

    I would consider a Raypak unit over the Jandy. They Jandy has several extra parts like a blower motor and when it goes out in 4-5 years, you might not be happy with the motor replacement cost.

    I look at efficiency on appliances that get used on a daily basis. Like a refrigerator, A/C unit, etc. At least for me, that is how I look at things.
    Paul
    http://www.gastekservices.com A word of caution: When working with gas and electrical you might want to consider a licensed contractor. Consider the value of your life and others around you. If you would like to provide a review of the help I provided, please use the following link to leave a review. gastek - Google Search,

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    setsailsoon's Avatar
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    Re: Heater Efficiency

    Chem Geek and PS0303,

    Thanks for the quick replies and info. This site really seems to be full of great people and great information! I've spent hours wandering around and didn't find the heater so thanks chem geek! the JXi would be a lot easier from an installation and is about the same (83%) so I'll go that way. PS0303 I did a little Googling on Raypac and there are certainly a LOT of people that give them accolades. Also, thanks for the gas/electrical warning. It's nice to see a focus on safety.

    Best regards,

    Chris
    -Chris-
    2013 In-ground plaster/pebble, screen enclosed, 12000 gal w/ Jandy 2 speed 1 HP pump, Jandy CS 200 cartridge filter, 800 gal spa w/ 1.5 HP booster pump, Solar heater, 2 LED lights in pool 1 light in spa, TF-100 test kit, The PoolCleaner Next Generation, Jandy RS-12 Automation system with iAqualink 2.0 control, Separate Hayward/Goldline Solar control

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