By Hayward Pool Products



Model # H250IDPL

Product Description

Induced Draft Heaters for In-Ground Pools and Spas

High performance. Low Nox. The new Hayward H-Series Low Nox Induced Draft Heaters feature a patent pending Finn Plate™ heat exchanger for constant heat disperse-ment, state-of-the-art pre-mix burners for environmentally friendly Low Nox outputs, hot surface ignition for instant and reliable fire up, and an advanced L.E.D. digital control panel for simple programming of pool temperatures.

It also includes an induced draft system that constantly moves air through the combustion chamber at a precise flow rate. As a result, all outside weather variables that can affect the heating performance, such as wind conditions, are eliminated — without having to install a high-wind stack.

NOTE: The Hayward IDL Series of heaters meet the Nox Emission standards set by the California South Coast Quality Air Management Commission for 2001.


  • Induced draft system constantly moves air through the combustion chamber at a precise flow rate,
  • Highly engineered, our patent pending heat exchanger design is the first of its kind in the pool business. The single header design combined with our unique baffle allows for long life, fast heating and virtually no condensation.
  • Easy-to-read L.E.D. Control Panel provides digital temperature readout and diagnostics for quick identification of components that might need service.
  • Rust-resistant water path, with injection-molded polymer header and union lock-nut assembly, provides for extended life and simple installation. Exclusive CPVC plumbing kit allows for universal heater replacement and maximum plumbing versatility.

H-Series Thermal Efficiency Rating = 84%

Warranty (In U.S.A. only):

1 yr. Parts

1 yr. Labor

10 yr. Headers

Tech Specs:

Electronic Ignition, Dual Thermostat

Model Number BTU Input Gas Type Heater Width Ctn. Qty. Ctn. Width
H250IDL 250,000 Natural 27" 1 207 lbs.
H250IDPL 250,000 Propane 27" 1 207 lbs.
H400IDL 400,000 Natural 35 1/4" 1 265 lbs.
H400IDPL 400,000 Propane 35 1/4" 1 265 lbs.




?     Asked on 11/22/2006by Guest

I currently have my pool heater hooked up in series with my pump motor, so that it turns off when the pump turns off. This heater has a digital control which I'm guessing needs power applied to it at all times. Does this mean I would need to hook the heater up to a separate circuit to maintain it's settings?

A  Answered on 11/22/2006 by InyoPools Product Specialist Patrick P.

We spoke with Hayward and they stated that ideally it would be best to wire this heater to a seperate circuit but since this heater only draws .3 amps that you could wire this in series with your pump.

?     Asked on 12/29/2011by Guest

How do you know if a pool heater is a propane heater or a natural gas heater?

A  Answered on 12/29/2011 by InyoPools Product Specialist Patrick P.

Typically in the product name we use the abbreviation of "LP" for propane or "NG" for natural gas. Click here for a full listing of our >Pool Heaters.

?     Asked on 1/16/2012by Guest

Will a gas heater operate at the low speed of a dual speed motor?

A  Answered on 1/16/2012 by InyoPools Product Specialist Patrick P.

Probably not - Most gas heater will shut off at low GPM levels (20-40) to keep the heater cores from overheating - 20 for 200 BTUs, 40 for 400 BTUs. Depending on your pool system you might get these GPM levels at the low speed but generally these heaters must be run at the motor's high speed.

?     Asked on 10/10/2012by Guest

What is the difference between an Electronic and Millivolt ignition?

A  Answered on 10/10/2012 by InyoPools Product Specialist Patrick P.

The basic answer is that Millivolt is the old style of ignition, using a standing pilot light. While the electronic ignition uses a spark start system like a gas grill. Electronic ignitions are more efficient in gas usage and also are better suited for high wind areas where a pilot light might get extinguished.

?     Asked on 10/18/2012by Guest

What is the elevation rating for the Hayward H-Series Low Nox Heaters

A  Answered on 10/18/2012 by InyoPools Product Specialist Patrick P.

Per Hayward, the Hayward H-Series Low Nox Heaters have an elevation rating up to 7,700'