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Old 07-01-2017, 10:29 AM   #1
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Flat Plate effeciency

This is for the guys with flat plate heat exchangers....

What kind of heat to you get from your hot water when the coolant is at max-temp and the engine is running? Do these transfer enough heat to use as a continuous hot water heater?

I'm trying to figure out a way to get the hot tub hot fast when boondocking. The electric hot tub pump only heat the rub ~2 degrees/hour
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Old 07-01-2017, 02:00 PM   #2
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Enough heat that I had to add a tempering valve. I've never measure the temp with the espar off and the engine running. I don't know why it wouldn't keep the temps up but I also have a circulation pump in the loop to increase coolant flows when the Espar is off.
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Old 07-01-2017, 03:11 PM   #3
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When I bring mine, I use a Ecotemp L5 flash heater with a separate Shure Flow pump. Takes me about 4 hours to be at full operational temp 104°. Wouldn't want to idle for that long.
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Old 07-08-2017, 11:20 AM   #4
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Thanks guys. I didn't even think about a gas fired heater. I'm still not sure which way to go. My pump will do 15 GPM so I suspect the flat plate will cope better with the higher flow. Also the smaller space needs are nice.
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Old 07-08-2017, 02:52 PM   #5
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Keep in mind the flow rate, if I have my valve open on my eccotemp it's half heat compared to not being able to touch the water on low pressure.
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