When installing a pool heater in an enclosed area like an equipment room, care must be taken to ensure that the proper vent adapter kit is installed. Vent kits for pool heaters are either negative pressure or positive pressure. Always check the installation manual to determine which vent kit is needed for the heater you are installing. A quick guide is that when the exhaust pipe will be vented horizontally out of a wall a positive pressure vent kit will be used and when venting vertically a negative pressure vent kit will be used.
Our most recent install was a vent kit for a Hayward Universal H-Series Low NOx 400,000BTU heater, model number H400FDN. The vent kit used was a Hayward UHXPOSHZ14001 Positive Pressure H400fd Indoor Vent Adapter Horizontal Replacement Kit for Hayward Universal H-series Low Nox Gas Heaters. Below is a picture of it.
The vent adapter gets screwed in right on top of the heat exchanger and is a pretty straight forward process. There is also a second blower vacuum switch that needs to be installed and you may have to switch the blower inlet baffle too. Both parts are included in the kit and the instructions that come with it are easy to follow.
After you install the vent adapter you must then run vent pipe outside. We used a single wall 8″ stainless steel pipe from Heatfab, part # (Heatfab Saf-T Vent EZ Seal P/N 980x * ). The type of pipe you will need is listed on page 17 of the SERVICE & INSTALLATION MANUAL for Hayward heaters under Table 9, Vent Pipe & Terminal Specifications for Positive-Pressure Indoor Vent Kits.
Connect all steel vent pipes according to HeatFab instructions and make sure you use Heat-Fab 7001SIL-5 gasket/seal lubricant on all joints. Finish installation with a HeatFab Wall Penetration Assembly that includes a Horizontal Termination.
The installation of a pool heater in an enclosed area is a very serious matter. Careful attention needs to be paid to proper venting to prevent any carbon monoxide leaking from the vent pipes into the enclosed area housing the heater. With proper installation though, this can be achieved by an experienced installer. Take your time and rely on the instruction manuals from Hayward and HeatFab.
Thank You,
Robert Flynn
President
New Jersey Pool Repair, LLC
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