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Hayward Universal H-Series Pool Heater H400FDN
Hayward Universal H-Series Pool Heater H400FDN
Regular price
$1,499.00
Regular price
$1,499.00
Sale price
$2,999.00
Unit price
per
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Hayward Universal H-Series Pool Heater H400FDN
Regular price
$1,499.00
Regular price
$1,499.00
Sale price
$2,999.00
Unit price
per
Get it between - and -.
🔥 Core Specs
\n- \n
- Model: H400FDN (also W3H400FDN newer number) \n
- Heating Capacity: 400,000 BTU/hr \n
- Fuel Type: Natural Gas \n
- Ignition: Electronic (IID – no pilot light) \n
- Emissions: Low NOx (environmentally compliant) \n
\n
🏊 What size pool it’s for
\n- \n
- Ideal for:\n
- \n
- 20,000 to 40,000+ gallon pools \n
- Large spas + pool combo setups \n
\n - Very fast recovery heater:\n
- \n
- Can raise temp roughly 1–2°F per hour depending on conditions \n
\n
\n
⚙️ Key Features
\n🔩 Heat exchanger (big advantage)
\n- \n
- Cupro-nickel heat exchanger \n
- Excellent for:\n
- \n
- Saltwater pools \n
- Hard water conditions \n
- Long-term corrosion resistance \n
\n
🌊 Hydraulic efficiency design
\n- \n
- “Totally Managed Flow” system \n
- Reduces pump runtime (up to ~18% savings claimed) \n
- Improves heating efficiency by balancing water flow through tubes \n
⚡ Controls & electronics
\n- \n
- Digital LED control panel \n
- Self-diagnostics (error codes like IF, LO, HS) \n
- Compatible with pool automation systems \n
🌬️ Combustion system
\n- \n
- Forced-draft design (blower-assisted) \n
- Stable heating even in windy conditions \n
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