Replacement Heat Exchanger and Header Assembly for Jandy Heaters

Replacement Heat Exchanger and Header Assembly for Jandy Heaters

Marsoni

M251S

$959.00

Get it in 3 business days with 1 day shipping. Friday, May 29

Replacement Heat Exchanger and Header Assembly for Jandy HeatersJandy JXi 400K Heat Exchanger and Header Assembly R0805805 Genuine Replacement The Jandy R0805805 Heat Exchanger and Header Assembly is the factory replacement heat transfer core for 400,000 BTU Jandy JXi gas heaters. Built to restore peak heating performance and combustion efficiency, this complete assembly pairs a new heat exchanger with a matched header, making it the go to repair when corrosion, scale, or impact damage compromises your original

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We offer a 30-day return/exchange service after receiving.
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i love this, im a very hot sleeper but this has been a game changer for me at night, its so soft and breathable i can sleep at night without waking up so hot. it doesnt hold odor and for the price of this its so worth it, i wish they had different colors cause light colors stain easier but i love the one i got.

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Reviewed in the United States on May 17, 2026

Verified Purchase

Kendra embrey

New York, US

★★★★★ 5

Cool and looks good

Color: Haze Blue, Size: King(106"*90")

Looks really nice and cooling. We love it!

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Reviewed in the United States on May 26, 2026

Verified Purchase

Danielle

Bozeman, US

★★★★★ 5

Love it! Both sides, soft, cool and cozy

I am a very HOT sleeper and I love this blanket! I have a couple other cooling blankets including the Rest brand which is now extremely expensive. This blanket is just as good as Rest's, if not better because it has two different sides. The cooling side does stay very cold to the touch and the microfiber side is very cozy and snuggy without overheating me. I like the weight of the blanket it's not too heavy but it's not too light or thin. Even my cat loves this blanket! She has a lot of blankets/ places to sleep but often I find her on my bed curled up on this blanket in particular. Just be sure to always wash in cold water and dry without any heat. I wash mine in cold and either use the no heat cycle of my dryer or more often air dry it, hanging it over my bedroom door with a fan pointed on it. Because of the material it dries quickly.

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Reviewed in the United States on October 4, 2025