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Old 10-29-2020, 07:55 PM   #1
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Aqua Hot discharge vent temperature?

I have measured 103 degrees at the discharge vents inside the MH and at the same time, 129 on the pump 1 and 2 hoses inside the aqua hot. There is not much flow from the vents. We are headed to Sedona AZ next week and the night time temps are going to force the use of the Aqua Hot instead of the heat pumps. I have never depended on the Aqua hot for MH heat. We will have 50amp service so I will take an electric space heater for backup.
What is your discharge vent (registers) temperature while keeping the MH interior about 70 degrees?
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Old 10-29-2020, 11:29 PM   #2
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Enjoy Sedona!!

Do you have heated tile floors? We find that with our previous 04 40' Allure, and now our 07 45' Magna, that we can stay comfortable with a single 1500W portable heater, and the heated tile floor cranked up to high. This into the mid 30's. In the AM, we may also turn on the AquaHot heating zones to pump up the temps if needed in the hours of getting up and moving around. Usually less 30-45 mins, then we turn it off again, and the combo of floor heat and portable heater are more then enough. If we need to get going early, and are taking showers. We'll augment the AquaHeat's Electric Element (Not needed as much in the 07 Magna as the 04 Allure, as the 07 Magna has dual electric elements.), by adding 'Diesel' burner heating to the mix. (Which, is the highest BTU available in these applications.).

We do use other heat gain (Sun and Cold) deterrents:
-Cushions in the Fantastic Fan Vents
-Window covers closed at night
-Outside Windshield Cover on
-And in temps say 30F or below, we use curtain rods to add insulation protection in the shower's solar dome.

And of course, emergency supplies of scotch strategically placed around the coach!

----

Sedona is great this time of year. Hope you enjoy it, and have a blast!!
Smitty
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Old 10-30-2020, 12:13 AM   #3
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If you are running electric elements only on your aqua-hot, that temp seems reasonable. Try running diesel, my water temps run 180 at the pumps and 140 out of the heat exchangers on diesel. Electric only is only for very mild temps, when it gets colder, I always use diesel burner.
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Old 10-30-2020, 05:37 AM   #4
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My reported temps were with the burner on. Wow, 180 out of the grills!!! There must be a thermostat inside the aqua hot that turns my burner off before it gets to 200.
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Old 10-30-2020, 10:17 AM   #5
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Quote:
Originally Posted by wsmcycle View Post
My reported temps were with the burner on. Wow, 180 out of the grills!!! There must be a thermostat inside the aqua hot that turns my burner off before it gets to 200.
No, 140 F. out of the heat exchangers, 180 at the pumps. Yes, two thermostats, electric one is set slightly above diesel burner so that electric will carry the load unless temps fall enough to require diesel. Believe about 190 F at the tank gives me 140 F at the heat exchangers. Have you verified that your diesel burner is actually running? You should be able to tell by putting your hand near the diesel exhaust pipe.
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Old 10-30-2020, 10:21 AM   #6
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You will never see 180* temp air being discharged from a heating coil.


Only way to get these systems to perform better and heat the coach on COLD days is increase the cfm.


You need more than just 140* air you need cfm.


Best MOD I've seen:


https://www.irv2.com/forums/f112/aqu...ml#post1769149
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Old 10-30-2020, 11:22 AM   #7
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I have confirmed that the diesel burner is working. I haven't had the electric on for this test. last night it was 38 degrees here and this morning at 6:00 am it was 70 inside and the vent air was 130 degrees. I was pretty pleased with that test.
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Old 10-30-2020, 11:40 AM   #8
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I have confirmed that the diesel burner is working. I haven't had the electric on for this test. last night it was 38 degrees here and this morning at 6:00 am it was 70 inside and the vent air was 130 degrees. I was pretty pleased with that test.
Great news. You can leave your electric element on at the same time to supplement your diesel burner, it will save you a bit of fuel, especially as outside temps warm up.
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Old 10-30-2020, 11:47 AM   #9
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I see 120 deg out of the heat exchangers on diesel.
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