Part # H350FDN
Warranty 1 Year
Universal H-Series Low NOx Heaters
For In-Ground Pools and Spas - Electronic Ignition Dual Thermostat
Now With Cupro Nickel Heat Exchanger!
NEW Hayward Universal H-Series Low NOx heater combines industry-leading hydraulic performance; environmentally responsible low NOx emissions and a standard cupro nickel heat exchanger with a low profile appearance, lighter weight design, independent left or right side electric, water and gas connections plus 2" x 2 1/2" CPVC union connections to provide the ultimate installation flexibility for new or existing equipment pads.
It also includes a forced 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 Universal H-Series heaters meet the NOx Emission standards set by the California South Coast Quality Air Management Commission for 2001 and the Texas Natural Resource Conservation Commission Code.
I am thinking of upgrading from a Hayward 250btu to the 350kBTU above and want to make sure everything else - the electric and natural gas fittings - will move easily from the old heater to the new one. Can you confirm for me, please?
Hi, Don Z. The electrical and gas line connection to the heater is the same; however, you may need to increase your gas pipe. Please refer to the Gas Supply and Piping chart which is on page 22 of the Hayward H-series LoNox Installation Guide.
Trying to replace a Sta Rite 200 BTU heater (natural gas) with a Hayward Low knox 300 or 350Btu heater (natural gas). Is there any difference in their connection in terms of sizing of pipes or any other special requirement I should be concerned about?
Hi. Yes, The gas connection to the heater will be 3/4", however, the gas pipe size will need to be changed if you're increasing the BTU. Overall you would want to look at clearances and each manufacturer has different installation requirements. Before purchasing go over the Hayward H-series LoNox Installation Guide.
If I install this "Pool Heater Universal H-Series Low Nox 350K BTU NG - H350FDN" in a pool shed/house does it require venting?
I need to replace my heater and would like to control it from my Aqualink RS pad in the house. Does this limit me to a Jandy heater, or will it work with other brands?
No, There are plenty of compatible brands that will work with your system. They would just have to be wired for that.
I want to install the Hayward Lownox heater on my pool but I live in the mountains at 3,000 foot elevation; do I need to buy a special high elevation heater?
Hello George, The Hayward Universal Low Nox are self adjusting up to 10,000 feet of elevation. Any installation above 2,000 feet will require a special restriction plate to be installed. Luckily, that plate comes standard with every heater so no need to purchase it separately.
Where can my heater be installed?
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.
Is it possible to convert this heater from natural gas to propane?
Is a vent required for typical outside installation for the Hayward 150k Ng Lo Nox heater?
For the Hayward Lo Nox heater, you would not need to purchase an additional vent if you are using it outside. If you are installing the heater outside, we recommend you purchasing a heater cover. This will protect your heater from debris, rain, snow, heat- or pretty much anything that could get caught in your heater. The Weather-Out Pool Heater Cover can be viewed on our website.
What is the difference between an Electronic and Millivolt ignition?
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.
Will a gas heater operate at the low speed of a dual speed motor?
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.
How do you know if a pool heater is a propane heater or a natural gas heater?
(5 out of 5 stars) Awesome Heater
Reviewed By: Tiffany4004 from Jackson, NJ ()
Pros: Price, Works Quickly, Effective
This heater is awesome..It works so quickly and it is very easy to use..It was also cheaper on inyopools.com then other websites.. I love it !
(4 out of 5 stars) Hayward Pool/Spa Heater
Reviewed By: Moon Man from Columbia, SC ()
Pros: Great price for a pool heater with a cupro-nickel heat exchanger.
Cons: Heater is a little bulky. Warranty: there seems to be an industry 1 year standard for pool heaters. That sucks for a piece of equipment that cost about $2k or more.
Heats the pool very effectively and easy to operate. Has a cupro-nickel heat exchanger which is great for salt water pool applications.