Laars MCH 75 Induced Draft Hydronic Boiler & Indirect Water Heater

• Input (MBTU/h): 75
• Input (kW): 21.9
• Heating Capacity (MBTU/h): 62.3
• Heating Capacity (kW): 18.2
• Net IBR (MBTU/h): 54.2
• AFUE: 83.2%
• 1st Hour Rate (GPH): 129
• Clearances:
  • Left: 2"
  • Right: 3"
  • Front: 4"
  • Rear: 2"
  • Top: 23"

• 30-gallon stainless steel tank
• Maximum working pressure - 150 psi
• 2" thick foam insulation. Less than 1/2°F per hour heat loss
• Hydrostatic test pressure at factory - 300 psi
• Pre-piped, factory assembled
• Single-wall cupro-nickel heating coil
• Circulating pump
• Check valves, for system isolation
• Adjustable tank stat, pre-set at 130°F
• Pre-installed temperature and pressure relief valve rated at 210°F and 150 psi
• Pre-piped 3/4" drain valve
• Domestic water priority
• High recovery rates (with 65°F rise)

• Built-in vent damper
• Maximum working pressure - water 30 psi, ASME-rated
• Hydrostatic test pressure at factory - 60 psi
• Maximum gas supply pressure: Natural - 9" W.C., Propane - 14" W.C.
• Pressure relief valve - capacity in excess of boiler input rating
• Cast Iron Headers and Wet Walls - per Section IV, ASME Code
• Water tubes - all copper with integral finned tubes
• 115/24V transformer
• Pump relay & inducer

Mini-Combo Model MCH.pdf