For Sale: ShowerMate M-550 – Marine Tankless Water Heater

[s/v Holiday]

This unit is new. Purchased a while back and never installed. This is a Propane Instant hot water heater. Below are the specs off of the manufacturer's website. Pm me if your interested, I'll take 800 for it, plus shipping. It goes for 1500 new.





Type: Gas instantaneous, power vented. Full gas modulation temperature control.
Dimensions: 11.5″ Wide x 13.5″ Deep x 19″ High, including power vent.
Weight: 30.5 pounds full.
Hook-ups: Electric: 18-2 x 2′ lead.Gas: Brass 3/8″ flare inside case, rear accessible.
Water: 1/2″ OD copper tubing.

Brass compression to 1/2″ NPT elbow can be installed or as specified.

Capacity: 55,000 Btu input – 44,000 Btu output at maximum burn at 8.5 WCI manifold pressure.15,000 Btu input – 10,600 Btu output at low burn at 1.2 WCI manifold pressure.
(88°F temperature rise per gallon per minute continuous flow at high burn).

Fuel Consumption: 2.55 lbs per hour at maximum input.(At 2 GPM of water, 20 lbs of propane will produce over 940 gallons of hot water).
Mounting: Side-mounted keyed bracket. Left or right side mounted.
Clearances: Zero clearance top (blower), bottom and sides. 2″ in back for hook-ups. Enough space in front to remove cover for service.
Venting: 2” power vent with proofing switch. (2” stainless flex duct recommended to the outside and can
run up to 15&prime.
Construction: Modular: Three assemblies; gas, electronics and water.Burner: High primary air, 12 element, atmospheric type.
Aluminized steel body with stainless flame strips.

Heat exchanger: Copper fin tube type with wrap for cooling.

Electronics: Plug in, potted, works-in-a-drawer.

Case and flue assembly are stainless steel.

Fuel: Propane at 11 WCI
Power: Burner: 12 element high primary air, atmospheric type with stainless steel flame strips.Aluminum manifold with brass pressure tap.
Orifices: Brass # 71 x 12.Gas Valve: Redundant solenoid with integral regulator

Water Temperature: Factory set at 115° F. Can be field adjusted 90° to 135°F.
Mounting:
Mounting flanges included. Must be mounted in accordance with any applicable Coast Guard and ABYC recommendations.
Safety Features: The Shower-Mate is pilotless. There is no flame unless water flow is sensed.Flame rectification: Gas valve shuts off in .8 of a second if there is a flame outage.
Redundant gas solenoid.

Electronic high temperature shut-off (2).

ECO high temperature shut off @ 165°F with manual reset.Pressure relief valve at 100 PSI.

Power vent must proof fluing before gas valve opens.
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[s/v Holiday]

Make ma an offer.

Here are some photos of the unit.
Cheers

[Boatguy30]

I clicked on this as I have a $120 ebay rv unit. About 1/8 the size of this but vents out an open hatch above not a flue.

Anyway, thought maybe I could up to a comparable marine unit or just see what it looked like. Pretty shocked

[Guddi]

I think this proposal is interesting. I have been looking for such a water heater for a long time. What are some tips for maintaining a tankless water heater? How often should it be cleaned? I found an article about flushing of the water heater. How do you think this is the right advice?

[s/v Holiday]

item sold