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Laars JX125N Gas-Fired Residential Hydronic Boiler - 125 MBTU/h

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Price: $2,153.95
Item Number: JX125
Manufacturer Name: Laars Heating Systems Company
Manufacturer Part No: JX125NXXU1

125,000 BTU Output - 84% eff.
1-1/4" Water Connections
3/4" Gas
Low Water Cutoff,
Outdoor Reset,
LESS PUMP

Brochure
Installation Manual
Warranty 
User Manual



Exceptional Value | High Performance

The Laars Mini-Therm® JX is a reliable gas-fired residential boiler with plenty of capacity to keep even the largest home comfortable on the coldest days.  The compact boiler has an efficient low-mass heat exchanger and a super-quick heating response to deliver years of warmth and comfort to your home.

  • Reliable Heating with a 20 Year Warranty
  • Energy Saving "Economy Mode" Built-In with the Mini-Therm JX Control
  • Environmentally Friendly
  • Simple Retrofit with Standard Tapping Locations
  • Longg Life Hybrid Heat Exchanger
  • Designed and Built at the Laars Headquarters in Rochester, NH USA

Benefits of Copper & Cast Iron

  • The Mini-Therm JX has a unique, field-proven heat exchanger design that intelligently combines finned copper tubing with cast iron "wet walls" to create a perfect balance of quck heat transfer and stored heat.
  • Copper transfers heat up to 7x faster than cast iron for a faster heating response
  • Cast iron wet walls store excess heat to minimize short cycling - increasing efficiency and heat exchanger life
  • Mini-Therm JX is smaller and lighter than traditional cast iron boilers making installation and maintenance much easier

Low Loss Header System

  • Maintains the correct temperature rise (Delta-T) across the heat exchanger - offering improved performance and longer heat exchanger life
  • Protects the heat exchanger from low return water temperatures  (Economy Mode or Outdoor Reset)
  • System pump interrupt for anit-condensing feature
  • Allows for direct replacement of traditionally piped cast iron boilers
  • Reduces installation time resulting in savings

Benefits of Copper & Cast Iron

  • The Mini-Therm JX has a unique, field-proven heat exchanger design that intelligently combines finned copper tubing with cast iron "wet walls" to create a perfect balance of quick heat transfer and stored heat.
  • Copper transfers heat up to 7x faster than cast iron for a faster heating response
  • Cast iron wet walls store excess heat to minimize short cycling - increasing efficiency and heat exchanger life
  • Mini-Therm JX is smaller and lighter than traditional cast iron boilers making installation and maintenance much easier

Laars Low Loss Header System

  • Maintains the correct temperature rise (Delta-T) across the heat exchanger - offering improved performance and longer heat exchanger life
  • Protects the heat exchanger from low return water temperatures
  • Allows for direct replacement of traditionally piped cast iron boilers

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