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Swimming pool HEATERS...was Wetsuits

Old 08-25-2017, 02:39 PM
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Default Swimming pool HEATERS...was Wetsuits

New thread since the OP has gone the distance and pool heaters seem to be the better choice for elderly people that need/want to use their pool during cooler months.

http://www.thehulltruth.com/dockside...etsuits-3.html

We have a 14K gallon pool with max depth of 5'. Located where water temps might get to 60 in the winter, but normal is 65...but comfort in the water is at 85 degrees.

Who knows what about how to make it happen? Solar is not an option, nor is NG.
Old 08-25-2017, 02:42 PM
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Heat pumps work Al long as air temp doesn't get below 55. Keep pool covered when not in use and it's not that expensive… cheaper than NG.
Old 08-25-2017, 03:02 PM
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Options are electric, propane, or see what you get out of a solar blanket.
Old 08-25-2017, 03:07 PM
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If you don't have NG and don't want to do solar the next best choice is a heat pump and a solar blanket to cut down on heat loss at night.
Old 08-25-2017, 03:08 PM
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Friends have a heat pump and they said it is pretty efficient. I had propane and it was expensive but my pool is nearly 40,000 gallons.
Old 08-25-2017, 03:10 PM
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Originally Posted by ericinmich View Post
Heat pumps work Al long as air temp doesn't get below 55. Keep pool covered when not in use and it's not that expensive… cheaper than NG.
That's reasonable. We don't get a ton of days below 55, so pick the days to do her water walking and its better than having to drive to an indoor pool. Plus, our season would be extended by 6 months, so that's a big plus.

Only option for power would be Electricity. NG not available, solar not available (trees), and propane seems to be both expensive for bottles and we don't think we want a large tank in the yard, but it is possible.

OK, electric or propane would be the choices.
Old 08-25-2017, 04:08 PM
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Originally Posted by bamaboy473 View Post
That's reasonable. We don't get a ton of days below 55, so pick the days to do her water walking and its better than having to drive to an indoor pool. Plus, our season would be extended by 6 months, so that's a big plus.

Only option for power would be Electricity. NG not available, solar not available (trees), and propane seems to be both expensive for bottles and we don't think we want a large tank in the yard, but it is possible.

OK, electric or propane would be the choices.
The only downside vs propane is the time it takes to heat up. On spring start up from water at 55 or 60 to 80 it takes a few days.
Old 08-25-2017, 06:29 PM
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Good to know. I'd think that we want a start-up/heat-up of hours, not days. I guess we look at a heat pump or pool heater first?
Old 08-25-2017, 06:35 PM
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I keep mine at 90 all year in Marco. It has a heat pump and average electric bill in the winter is $400. It is warmer than you may get but we get some cold days as well. I run the heater from 6am - 10pm every day so it never gets too cold.
Old 08-25-2017, 06:36 PM
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propane and get real expensive.
Old 08-25-2017, 06:55 PM
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If you don't keep the pool covered it is real hard to heat it. I have a 15,000 gallon pool and a 330,000 BTU gas heater. I felt like I would be doing as well just burning dollar bills on the deck next to it.
My wife ran a country club community up until this week and she had six 25,000 gallon uncovered pools. On cold (SW Florida cold) days, the 5 ton heat pumps ran 24/7 and could not hold 80 degrees.
OTOH my neighbor with a 10,000 gallon pool and a bubble cover can keep it at 85 or so all winter with nine 4x12solar collectors. That is more than 100% of water surface area tho. It cools off pretty fast when she uncovers it. She usually just rolls the cover back a few feet and sits there in the shallow end.

I decided to man up and learn how to swim in 70 degree water like my kids up north. That is August in Traverse City ;-)
Old 08-25-2017, 07:13 PM
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Originally Posted by bamaboy473 View Post
Good to know. I'd think that we want a start-up/heat-up of hours, not days. I guess we look at a heat pump or pool heater first?
You really need to get it covered, keep it at whatever temp you want all the time. About a third of the heat on a pool is due to cooling from evaporation. We have an auto roll on/off cover, keep the heat up, works great.

If you want fast heat up, need propane, but still takes a half day or more from cold.
Old 08-25-2017, 08:16 PM
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Whatever heat method you choose, remember that it's not about pool depth or gallon capacity. It's all about surface area. That's how you choose heater size.
Old 08-26-2017, 04:48 AM
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Originally Posted by Garett View Post
Could you install a 2" black ABS pipe system off a southern facing roof to warm the water by thermo energy? You'd only need a small electric pump to move the water.
No can do. Too many trees keep the roof shaded, so the most sun that an section might get is several hours a day.
Old 08-26-2017, 06:32 AM
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We have a heat pump, works great once it gets up to temp.
Takes a day or so to go from 60 to 80. Pool is small 5500 gallons
As mentioned keep it covered and it will be cheap to heat
Old 08-26-2017, 06:46 AM
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Cover might have to happen, but a kidney shaped pool with rock wall on one end and plantings on either side makes using a cover a PITA...but better than huge heating bills or a pool that might not heat up because so much heat loss.
Old 08-26-2017, 07:06 AM
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For you fluid mechanic guys. If using 1 1/2" PVC pipe, will 90 degree angles inhibit water flow enough to count? I'm thinking about 10 30' sections parallel, so 20 right angles would be involved,
Old 08-26-2017, 01:24 PM
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Originally Posted by bamaboy473 View Post
For you fluid mechanic guys. If using 1 1/2" PVC pipe, will 90 degree angles inhibit water flow enough to count? I'm thinking about 10 30' sections parallel, so 20 right angles would be involved,
http://www.engineeringtoolbox.com/re...gth-d_192.html

From the table, one 1-1/2" 90 degree bend is equal to 7.4 feet of 1-1/2" pipe, so twenty would be like pushing through 148 feet of pipe, plus the 300 feet of straight pipe.

http://www.freecalc.com/fricfram.htm

According to his on-line calculator, you'll lose about 9 psi at 30 gallons per minute.
Old 08-26-2017, 06:54 PM
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Thanks, Louie. That's half of the operating pressure, so I don't like that plan...and passive heating is a lot cheaper, but doesn't do much when temps are low and its cloudy outside for days at a time.

Looks like I have to wrestle with the heat pump wiring challenge.

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