Author Topic: Pool Heater Venting.  (Read 2738 times)

Offline walker

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Pool Heater Venting.
« on: May 26, 2018, 08:21:11 PM »
Can anyone guide me on doing venting for a pool heater inside of a shed.  Specifically looking to do a Hayward H250FDN.

I know I need to get the adaptor.  But do I do a negative pressure or positive pressure installation, through the roof or sidewall?

Offline Admin

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Re: Pool Heater Venting.
« Reply #1 on: May 26, 2018, 09:46:28 PM »
Negative pressure venting can use vertical venting only.  Positive pressure venting can use horizontal or vertical venting.  It looks like your model would use 4" stainless steel B-Vent if you used the positive pressure vent kit.  You will likely need an outdoor and ventilation air supply.

Offline walker

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Re: Pool Heater Venting.
« Reply #2 on: May 26, 2018, 10:42:26 PM »
Negative pressure venting can use vertical venting only.  Positive pressure venting can use horizontal or vertical venting.  It looks like your model would use 4" stainless steel B-Vent if you used the positive pressure vent kit.  You will likely need an outdoor and ventilation air supply.

I've never run B or C vent through a ceiling / wall.  I'm not really sure the process, do they make kits that have the fittings for going through the ceiling / wall?

Offline Porcupinepuffer

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Re: Pool Heater Venting.
« Reply #3 on: May 27, 2018, 08:29:26 AM »
Since it's a shed, you likely don't have a ceiling to pass through. Just a roof. So aside from obvious venting lengths, you'd be looking for a roof flashing. Either one for a steep or normal roof pitch. Steep flashing is for something over 7/12 to 12/12. You also need a vertical cap and a storm collar... tin roofs typically use a different type of flashing that's rubberized for surface mounting.

Going out the wall you'd need some sort of wall thimble, a horizontal cap, and obvious venting pieces... In some situations (if the siding is vinyl) there may also be a vinyl siding standoff that goes behind the horizontal cap to give added heat protection/clearances of the cap to the vinyl siding.

Offline walker

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Re: Pool Heater Venting.
« Reply #4 on: May 27, 2018, 08:50:08 AM »
Are these the type of things a supply house would have?

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Re: Pool Heater Venting.
« Reply #5 on: May 27, 2018, 11:33:53 AM »
See Table 9 below.  They will sell either the Duravent or Heatfab kit.

Offline slo-115

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Re: Pool Heater Venting.
« Reply #6 on: May 27, 2018, 12:47:22 PM »
I would just build a Don Park Bvent chimney. I think that model is limited to 3-6" elbows and you will need to buy the vertical vent adapter UHXNEGVT12501.

BV6BAF Adjustable Type B Roof Flashing, 6 in.
BV6BSC B-Vent Storm Collar, 6 in
BV6BE 90 Degree B-Vent Adjustable Elbow, 6 in.
BV6BBT Bell Top B-Vent Rain Cap, 6 in.
BV6BSA B-Vent Support Plate, 6 in.
BV6B5 Aluminum B-Vent Duct Pipe, 6 in. Dia. x 60 in. L
BV6BDC B-Vent Draft Hood Connector, 6 in.

Then use a little 26ga 6" smoke pipe off the heater to the chimney. I find this the lest expensive way to vent a pool heater, plus less clearance issues. As others have mentioned combustion air openings need to the considered.

Offline walker

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Re: Pool Heater Venting.
« Reply #7 on: May 27, 2018, 01:10:00 PM »
I would just build a Don Park Bvent chimney. I think that model is limited to 3-6" elbows and you will need to buy the vertical vent adapter UHXNEGVT12501.

BV6BAF Adjustable Type B Roof Flashing, 6 in.
BV6BSC B-Vent Storm Collar, 6 in
BV6BE 90 Degree B-Vent Adjustable Elbow, 6 in.
BV6BBT Bell Top B-Vent Rain Cap, 6 in.
BV6BSA B-Vent Support Plate, 6 in.
BV6B5 Aluminum B-Vent Duct Pipe, 6 in. Dia. x 60 in. L
BV6BDC B-Vent Draft Hood Connector, 6 in.

Then use a little 26ga 6" smoke pipe off the heater to the chimney. I find this the lest expensive way to vent a pool heater, plus less clearance issues. As others have mentioned combustion air openings need to the considered.

Great info, thanks a lot.

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Re: Pool Heater Venting.
« Reply #8 on: May 27, 2018, 01:42:52 PM »
Just remember using a positive pressure vent system means the appliance is Category III and requires stainless steel venting.  You can also use 4” instead of 6” according to Table 9.

Quote
Vent pipe diameter must match the vent pipe diameter on the heater (see Table 9). The vent pipe must be single or double-wall stainless steel sealed vent as listed in Table 9.