{"product_id":"26-55209-k","title":"Balboa 15\" 4.0kW Auxiliary Heater (26-55209-K)","description":"\u003cp\u003eBalboa 15\" 4.0kW Auxiliary Heater (26-55209-K) is designed to provide supplemental heating in compatible spa installations that use a separate auxiliary heater arrangement. Unlike a primary heater built directly into a standard control pack, an auxiliary heater must be matched to the system design, electrical load, plumbing path, and control strategy already present in the spa.\u003c\/p\u003e\u003cp\u003eAuxiliary heaters serve a different role from the primary heater in a spa pack. They are used where the system was designed to add heating capacity through a dedicated secondary assembly, so replacing one requires more than matching kilowatt output alone. The control interface, plumbing sequence, available flow, and electrical requirements all need to correspond with the original installation.\u003c\/p\u003e\u003cp\u003eThe 4.0kW rating is a common full-size spa heating specification, but output alone does not determine interchangeability. Two 4.0kW heaters may use different control families, sensor arrangements, wiring interfaces, mounting details, or plumbing positions. Verifying those details before installation helps prevent an otherwise similar-looking heater from becoming an incorrect replacement.\u003c\/p\u003e\u003cp\u003eProper fitment begins with verification. Compare the existing heater’s part number, length, rated output, sensor or control connections, plumbing orientation, and electrical requirements before ordering. Spa heaters are not universally interchangeable, and taking a few minutes to confirm these details can reduce installation delays, unnecessary returns, and repeat service calls.\u003c\/p\u003e\u003cp\u003eOnce correctly matched and installed, the Balboa 26-55209-K can help restore dependable water heating, steadier temperature maintenance, and the day-to-day comfort expected from a properly operating spa.\u003c\/p\u003e\u003cul\u003e\n  \u003cli\u003eAuxiliary heater design for compatible supplemental-heating applications\u003c\/li\u003e\n  \u003cli\u003e4.0kW rated heating output\u003c\/li\u003e\n  \u003cli\u003e15\" heater configuration for correct physical fitment\u003c\/li\u003e\n  \u003cli\u003eMatch original electrical, plumbing, and control-system requirements\u003c\/li\u003e\n  \u003cli\u003eSupports dependable temperature recovery when correctly matched and installed\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Therm Products","offers":[{"title":"Default Title","offer_id":49079907287195,"sku":"26-55209-K","price":325.69,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1751\/9347\/files\/26-55209-K.jpg?v=1784868195","url":"https:\/\/www.bathandspaparts.com\/en-ca\/products\/26-55209-k","provider":"Bath and Spa Parts Online","version":"1.0","type":"link"}