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By Hayward Pool Products

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Model # H3501

Product Description

The Hayward H-Series heater represents the very latest in heating technology for swimming pools and spas. Advanced features include digital touchpad display on all electronic direct spark and induced draft hot surface heaters, rust-resistant water path with polymer header assembly, and a rapid-heat combustion chamber. H-Series heaters are easy to install and maintain, thanks to its low profile, light weight and CPVC plumbing capabilities.

Rust resistant water path, with injection-molded polymer header, offers improved by-pass control and extended life by providing additional protection from the damaging effects of erosion from high flow conditions.

Easy-to-read L.E.D. Control Panel provides digital temperature readout and diagnostics for quick identification of components that might need service.

Heat exchanger reliability is improved due to the reduction of condensation hat can form on tubes. Exclusive CPVC plumbing kit allows for universal heater replacement and maximum plumbing versatility.

Our patented single header "V" baffle design heat exchangers allow for long life, fast heating and virtually no condensation. All Hayward heat exchangers are now protected with highly resilient Cupro Nickel for greater durability and longevity.

Constructed of tough, durable stainless steel, H-Series burners can be removed individually or as a complete unit for easy maintenance and cleaning.

H-Series Thermal Efficiency Rating = 83%

1 year parts and labor limited warranty for single family residential users

For the H-Series installation manual,click here.
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Ask A Question

?     Asked on 12/29/2011by Guest

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

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.
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?     Asked on 1/16/2012by Guest

Will a gas heater operate at the low speed of a dual speed motor?
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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.
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?     Asked on 10/10/2012by Guest

What is the difference between an Electronic and Millivolt ignition?
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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.
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?     Asked on 10/18/2012by Guest

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

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'
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?     Asked on 10/8/2013by Guest

Where can my heater be installed?
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A  Answered on 10/8/2013 by InyoPools Product Specialist Patrick P.

There are specific venting requirements and clearance distances that must be met to ensure proper operation. Consult the owner’s manual for exact specifications for your model of heater.NOTE: Gas fired heaters should be diagnosed and repaired by trained personnel.
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