Looking for a watermaker

[Pblais]

Does it have a pilot light or ignition on demand?

It uses no electric power. It uses a manual pezio electric interlock pilot light. You slide to start position, hold pilot open and press ignition., hold pilot lit for a few more seconds and release, The slide to operational position and pilot remains lit as long as you want. The burner lights on demand. You can dial the flow rate of the hot water to deliver higher volumes at a low temperature or lower volumes at a higher temperature. The ODP sensor does keep you from killing yourself. Ours is in the shower itself. I use a solar powered exhaust fan and usually open the port as well.The vented heat from the unit dries the shower stall. It does vent a fair amount of heat so it has a heat shield directly above and behind the unit. This isn't something you bury in a locker. It's not hard to take apart at all and has only a few things to service. Rigging a vent would require a cap for the flue under most sailing conditions so the ventless unit is a better choice. They only make one unit with the OPD sensor last I checked. We plumb hot water to the head, cockpit, and galley fixtures too but it's not like you can operate all of them at once and have really hot water. The propane has a separate shutoff at the unit so you can just close it off.

[philip van praag]

i relise the subject is drifting of topic and most of you chaps are in hot climate.
we have a desil heating, insted of the hot air we opted for the water system and use small matrix radiators with fans same as in a car heating. this also alows us to have a hot towel radiator in the heads.
we then disconected the engin water heating and plumbed it into the heating. so we get warm boat and water. or tern of the fans behind cabin radiators and we get hot water and hot towels.
low desil consumption and heats tank in 20-30mins and no main engin start.
this type of system could also take a small solar pannel and only need a isolation valve to tern it on/of.

[Amgine]

The original Freedom 40s had a long, shallow passive solar water heating tank in the coach roof, allowing gravity-feed to the shower.

Turned out the actual market for the Freedom 40 was primarily wealthy comfort-loving cruisers who installed pressure water systems and water heaters, so the simple solar systems were discontinued.

[charlotte alane]

Originally Posted by Pblais

It uses no electric power. It uses a manual pezio electric interlock pilot light. You slide to start position, hold pilot open and press ignition., hold pilot lit for a few more seconds and release, The slide to operational position and pilot remains lit as long as you want. The burner lights on demand. You can dial the flow rate of the hot water to deliver higher volumes at a low temperature or lower volumes at a higher temperature. The ODP sensor does keep you from killing yourself. Ours is in the shower itself. I use a solar powered exhaust fan and usually open the port as well.The vented heat from the unit dries the shower stall. It does vent a fair amount of heat so it has a heat shield directly above and behind the unit. This isn't something you bury in a locker. It's not hard to take apart at all and has only a few things to service. Rigging a vent would require a cap for the flue under most sailing conditions so the ventless unit is a better choice. They only make one unit with the OPD sensor last I checked. We plumb hot water to the head, cockpit, and galley fixtures too but it's not like you can operate all of them at once and have really hot water. The propane has a separate shutoff at the unit so you can just close it off.

Spent some time onthe internet today trying to find what you describe, but no luck.
Can you offer a model # or other helpful info?

[Pblais]

Spent some time onthe internet today trying to find what you describe, but no luck. Can you offer a model # or other helpful info?

Bosch 38B.

[GordMay]

Originally Posted by Pblais

... Rigging a vent would require a cap for the flue under most sailing conditions so the ventless unit is a better choice ...

Bosch “AquaStar” tankless (on demand) gas water heaters:
Gas Products - Whole House Tankless Water Heaters by Bosch

The Ventless Bosch 2400EO are designed for outside installation only.

The 38B requires a B-Vent.

Tech Info for AquaStar 38B Water Heaters :
Bosch Aquastar Tankless Gas Water Heaters - Model 38B Instant Water Heater

http://tanklesswaterheater.net/Porta...lish_12_yr.pdf

Caution: In addition to the above, the Aquastar gas water heater must be properly vented to ensure safe and efficient operation.