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LAARS - Compact Gas-Fired Hydronic Boiler 100 MBTU/h Natural Gas

Item: JVS100NDIS

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About This Product

Product Info


LAARS - The JVS model offers a new attractive and easy-to service jacket. Well-known for its economy, the Mini-Therm has a built-in draft diverter and automatic vent damper to stop your valuable fuel payments from disappearing up the chimney in wasted heat.

Standard Equipment
  • PI Controller
  • Outdoor reset with ratios of 0.4 to 3.6
  • Warm Weather Shutdown (WWSD)
  • Domestic Hot Water Operation (DHW)
  • Indicator lights for power, heat call, DHW call and WWSD
  • Automatic boiler differential
  • Pump pre-purge, post-purge and excercise
  • Codes for sensor errors
  • Venting: built-in draft diverter
  • Design certified/tested by CSA International
  • Natural or propane gas
  • Maximum working pressure: water 30 psi, ASME rated
  • Hydrostatic test pressure at factory: 60 psi
  • 30 psi ASME pressure relief valve
  • Maximum gas supply pressure: Natural 10-1/2" WC; Propane 13" WC
  • Pressure relief valve: capacity in excess of boiler input rating
  • Material specifications per Section IV, ASME Code
  • Headers: cast iron per ASME requirements
  • Tubes: copper with integral formed external fins
  • Main burners: aluminized steel
  • Air supply: natural aspiration
  • Altitudes: 0 - 10,000 ft.
  • Spark to pilot ignition
  • Electrical: 115V-60Hz-1PH less than 12 Amps 24V transformer mounted and wired
  • Pump relay: standard
  • Vent damper and wire harness
  • Blocked vent safety switch (BVSS)
  • Flame rollout safety switch
  • Up to 85% AFUE


Weight134 Pounds (lbs)
Width17 Inches (In)
Height29 Inches (In)
Country of OriginUSA
Length28 Inches (In)
Air FlowNone Provided by Manufacturer
BTU Input100000
BTU Output85000
Connection Size1 1/4" NPT
Connection TypeNPT
CUL ListedYes
Energy Star RatedNo
FinishPowder Coated
Fuel TypeNatural Gas
Gas Connection1/2" [12.7 mm] N.P.T.
Gas TypeNatural Gas
Ignition TypeDirect Spark
Temperature Range150°F to 220°F (65.5°C to 104.4°C)
UL ListedNo
UL RecognizedNo
Voltage115 VAC
Warranty OfferedYes


Equipment Part List