Diesel Demand Water Heater

[Rex Delay]

Have searched with no current results. Is there a stand alone diesel hot water heater anywhere? Already have Espar heat, just want morning shower. Does it exist? Had a Paloma on previous boat and it was wonderful! Need an insureable diesel option.

[Rex Delay]

I assume this means no such product exists?

[Viking Sailor]

I found these guys some time ago: http://www.dieselheat.com.au/hot-water/

[Rex Delay]

Link does not work.

[nwdiver]

I have the demand hot water heater........but it comes with a 4 zone hydronic boat heater......

Marine Heating Systems – Itrheat

[Lepke]

Search for oil water heaters. There are many, tankless, tanked etc.

[Siberian Sea]

Webasto makes a small unit that burns diesel and it’s used to keep warm the engines of semi trucks so they don’t have to run their engines at night in cold weather. A typical semi cooling system holds around 10 gallons of coolant. I think it possible to install one of these units on your boat and use it to heat the water in a 5-10 gallon tank for showers.

[Scout 30]

Originally Posted by Viking Sailor

I found these guys some time ago: Hot Water | Dieselheat

This looks like a well designed high quality unit & at $1,880 it's priced like boat stuff. Some feedback from actual users would be interesting. Another option is a Honda 2000. Top up your batteries in the morning while you're running your electric water heater.

[Bleemus]

Whatever you choose make sure your insurance agent will sign off on it.

[Dockhead]

Originally Posted by Rex Delay

Have searched with no current results. Is there a stand alone diesel hot water heater anywhere? Already have Espar heat, just want morning shower. Does it exist? Had a Paloma on previous boat and it was wonderful! Need an insureable diesel option.

Is it Espar hydronic or air? If it's hydronic, you've already got it. For instant hot water, a plate type heat exchanger will do it. Or use a calorifier.

If it's air, then you will need to add a hydronic unit for hot water. You can add some radiators as a bonus.

[Rex Delay]

Espar is air. Last boat had a Paloma propane demand heater and it was pure luxury. Hot shower anytime. Seeking diesel alternatives has been challenging. In a wet climate, forced air systems are the driest heat, hydronic will make hot water but not dry the boat. Looking for demand hot water for under $1k. Do not wish to replace a functional heating system for big $ just for shower!

[Rex Delay]

Current thinking is to replace my 30 yr old electric/heat exchange water tank with new, hopefully more efficient tank. Last time we used the engine purely for hot water production, it took 45 minutes! Perhaps a new tank will work better?

[Paul L]

Originally Posted by Rex Delay

Current thinking is to replace my 30 yr old electric/heat exchange water tank with new, hopefully more efficient tank. Last time we used the engine purely for hot water production, it took 45 minutes! Perhaps a new tank will work better?

The ITR on-demand diesel heater mentioned above fits in about the space of a hot water tank.

[Bleemus]

No insurance company will approve a Paloma.

[Rex Delay]

Originally Posted by Bleemus

No insurance company will approve a Paloma.

That is why I seek alternate