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Old 02-05-2023, 02:16 PM   #1
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2011 newmar dutchstar with oasis ITR modular hydronic heating system

Good afternoon, weíre fairly new to the RV world so donít laugh at our question please. We want to know if we shut off the burner switch will we still have hot water for shower and dishes etc
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Old 02-05-2023, 02:21 PM   #2
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Probably have a switch for the electric element(s) along with the diesel switch.

Ours is newer but the only time we have needed the diesel switch on is when we turned in the furnace. Other than that the electric elements have kept up with showers and laundry just fine.

I have read that when you first get to a location to use the burner initially before turning on the electric to get things up to temp.
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Old 02-05-2023, 04:35 PM   #3
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You should have a selector sw for the elec hot water.
Normally, you can choose between Off, I or II for elec.
We are usually fine with 2 showers using elec.
It does depend on incoming water temp, and if very cold, you might need the diesel burner boost.
Don & Marge
'13 Newmar Ventana 3433 - '14 CR-V TOAD
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Old 02-05-2023, 05:32 PM   #4
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Originally Posted by daviessz90 View Post
Good afternoon, we’re fairly new to the RV world so don’t laugh at our question please. We want to know if we shut off the burner switch will we still have hot water for shower and dishes etc

You will need either the burner or AC I/II switches on to have hot water. On the off chance yours is plumbed to engine coolant, you may have hot water and furnace while the engine is running with both switches off.

Some people have good luck getting hot water on AC II, but AC I is just there for keeping your plumbing unfrozen at night. AC I has 2500btu heat, AC II has 5000btu heat. Burner has 55,000btu heat. If you like long, hot showers or using more than one faucet at a time, AC II will not keep up.
2021 Newmar Super Star 4051, Glacier Interior + Exterior
2021 Bravo Silver Star 24'
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Old 02-05-2023, 06:15 PM   #5
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Here's some reading for you.....I wrote it when we first got a coach with hydronic heating.
Don & Mary
2019 Newmar Dutch Star 4018 (Freightliner)
2019 Ford Raptor
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Old 02-05-2023, 09:39 PM   #6
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I rarely run the burner. If we need to use the Oasis to heat the coach or to exercise it if it's been a while, is about it.

When we pull in to a campsite the water is hot since we have the engine heat feature. I just turn on the electric. We have no issues with having enough hot water taking showers one immediately after the other, laundry, etc.
"Second star to the right and straight on 'til morning"
On the Mississippi in SE Minnesota
2013 Newmar Mountain Aire 4336
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dutchstar, heat, heating, newmar, oasis

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