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#4 in Pool Heaters
Hayward H400FDN Universal H-Series
Hayward
$2,300.00 – $2,900.00
400,000 BTU natural gas heater with cupro-nickel heat exchanger standard, low-NOx emissions, and universal plumbing that eases retrofits. The induced-draft design holds performance in windy exposed installations.
8.7
Excellent
Consensus
Don't buy this if…
- Skip natural-gas models if your home lacks a gas meter upgrade path, as 400k BTU demands serious line capacity.
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