Hayward H350FDN Universal H-Series low NOx induced draft natural gas pool and spa heater, 350,000 BTUHayward Universal H-Series Low NOx Induced Draft Pool and Spa Heater, 350,000 BTU Natural Gas, H350FDN$2,68399
Hayward H350FDN Universal H-Series low NOx induced draft natural gas pool and spa heater, 350,000 BTU
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Hayward Universal H-Series Low NOx Induced Draft Pool and Spa Heater, 350,000 BTU Natural Gas, H350FDN

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$2,68399
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Quick overview

  • Universal H-Series Hayward workhorse gas heater line for pools and spas.
  • 350,000 BTU Sized for larger pools and for spa heat up times that owners will actually wait for.
  • Natural gas Set up for natural gas service, not propane.
  • Low NOx Built to the low NOx emissions standard.
  • Induced draft Uses an induced draft design rather than natural draft venting.
  • Genuine Hayward Hayward model H350FDN.
Full description and specifications ↓

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Hayward TurboCell T-15 Salt Cell for Inground Pools up to 40,000 Gallons, W3T-CELL-15 Hayward Genuine OEM SP1082 Skimmer Basket, SPX1082CA Hayward Genuine OEM Vari-Flo XL Filter Valve Key Cover Handle Assembly, SPX0714BA Hayward H-Series Bezel & Keypad Assembly, FDXLBKP1930
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Pool cleaners: Hayward TracVac and PoolCleaner suction cleaners lined up on a pool deckPool automation: the Hayward app on a phone held up in front of an infinity poolPool water features: two bubblers in a tiled spa, a woman relaxing on a lounger behind
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Product details

The Hayward H350FDN is the 350,000 BTU natural gas model in the Universal H-Series, Hayward standard gas heater line for pools and spas. It is a low NOx, induced draft heater.

Where this size fits

350,000 BTU sits at the larger end of the H-Series. It suits bigger pools, pool and spa combinations where the spa has to come up to temperature quickly, and installations in cooler climates where heat loss is constant. Sizing depends on pool volume, exposure and how quickly you want to recover, so let your installer confirm the number against your pool.

Installation notes

This is the natural gas version, so it needs a natural gas supply with the right pipe size and pressure. Induced draft heaters have their own venting requirements, and gas heater installation is licensed work in most places. The heater ships by freight.

Specifications
Brand Hayward
Manufacturer part number H350FDN
Type Pool and spa heater
Series Universal H-Series
Heat input 350,000 BTU
Fuel Natural gas
Draft Induced draft
Emissions Low NOx
Shipping weight 214 lb
Ships Freight

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Questions and answers

What people ask about this product, answered by our pool techs.

Is this natural gas or propane?
Natural gas. The H350FDN is the natural gas model, so it needs a natural gas supply.
What size pool is 350,000 BTU for?
It is the larger end of the H-Series range. Correct sizing depends on pool volume, how much surface the wind and air reach, and how fast you want to recover heat, so have your installer size it against your pool.
What does induced draft mean here?
The heater uses a fan to move combustion air and exhaust rather than relying on natural draft. It changes the venting requirements, so follow the Hayward installation instructions for your setup.
Does it ship by freight?
Yes. A full gas heater is too large and heavy for parcel, so it moves by freight.
Ask your own question