TwinTemp Junior Propane Tankless Water Heater

One heating zone with up to six blowers. Whisper quiet operation and no diesel smell.
  • On-Demand Hot Water & Hydronic Heat
  • Designed specifically for RVs, Buses, Tiny Houses, Barns, and more
  • Whisper-quiet operation and no diesel smell
  • Dimensions 20.5” wide x 16” deep X 14”high
  • Weight 65 pounds
  • No pilot light and 35% higher efficiency
  • Fully certified to ANSI Z21.10.3/CSA 4.3 standard
  • 55,000 BTU burner and one 1,500 watt electric element and one heating zone
  • No sidewall penetration Lighter, compact design that saves space and gas usage

Price - $4,275

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TwinTemp Junior
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   Hydronic Heat — Now Without Diesel

Unlike diesel-only tankless water and hydronic heaters, the TwinTemp runs on propane and can be used in all motorhomes, fifth wheels, horse trailers and towables.

In addition to the versatility of propane, the TwinTemp Junior offers greater heating efficiency, whisper-quiet operation, and safer flue gas temperatures.

  Dual-Source Unlimited Heat

With a 55,000 BTU propane burner—the highest hot water output in the industry—and a 1500-watt electric element, the TwinTemp Junior delivers on-demand, continuous hot water and hydronic space heating.

The heater operates only when the hot water outlet is turned on. The VariFlame control system then keeps the water temperature constant, regardless of the flow rate or incoming water temperature.

  More Hot Water and Heat. Less Propane.

With higher efficiency and 60,000 BTUs, the TwinTemp Junior produces more hot water than traditional water heaters.

With higher efficiencies, many people report that they use up to 50% less propane. Owners love the lower operating costs and fewer fill-ups.

Type:Gas instantaneous, power vent water / space heater.
Full gas modulation temperature control.
Certified to UL 307A & ANSI Z21.10.3
Dimensions:20.5″ Wide x 16″ Deep x 14″ High.
Weight:101 pounds
Hook-ups:Gas, brass 3/8″ flare.
Water and heating lines 1/2″ FTP brass.
DC Electric, 12-2×2′ lead . 110VAC – 14-3 SJO plug
Capacity:Gas 55,000 BTUs input – 44,500 BTUs output @ maximum burn at 8.5 WCI manifold pressure.
15,000 BTUs input – 12,500 BTUs output @ low burn at 1.2 WCI manifold pressure (88° F temperature rise / gallon / minute continuous flow at high burn).
1-1500Watt/5100 BTU-110 Volt element
Gas Train:Burner: 12 element high primary air, atmospheric type with stainless steel construction.
Orifices: Brass # 71 x 12.
Gas Valve. Redundant solenoid with integral regulator.
Water Assembly:Heat exchangers: solid copper, Hook- ups, 1/2″ OD copper tubes.
Water line – brazed hard copper.
PRV: Approved set @ 25 PSI.
Optional: Engine Assist and Hot Tap Dispenser.
Venting:Power vent, proofing, terminating to 2” exhaust through floor of vehicle.
Construction:Powder coat aluminum case.
Modular – 3 assemblies – gas, electronics and water.
Case & flue assembly are 18 gauge welded stainless steel.
Component access is through front access panel.
Fuel:Propane at 11 WCI Power: 12 VDC at 4.5 Amp full operation. (Operating range 10.5 – 15 VDC)
Flue Gas Temperature:Under 300° F
Water Temperature:Potable water is tempered and temperature can be field adjusted for 100-145 degrees F.
HotTap: Minimum 180° F.
Flange mounts that screw to coach floor.
Must be mounted in accordance with local codes or in absence of local codes: Manufactured Home Standard, Title 24 CFR, Part 3280 or Recreational Vehicle Standard ANSI A 119.2/NFPA501C
Safety Features:Pilotless.
Flame rectification.
Gas valve shuts off in .8 second if there is a flame outage.
Redundant gas solenoid.
Electronic high temperature shut-off (two).
ECO high temperature shut off at 212°F with auto reset.
Pressure relief valve @ 25 PSI.
Power vent with proofing.
Due to continuous product improvement, PrecisionTemp reserves the right to change specifications at any time.

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