Mini-Therm® JX 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 Field proven long-life heat exchanger design offers dependable performance, year after year
Energy Saving “Economy Mode” Built-In Economy mode optimizes fuel use and reduces energy bills over time by tracking a home’s heat use pattern and adjusting boiler water temperature, up or down, as needed
Environmentally Friendly Reduced fuel use and lower emission levels as compared to older, low efficient boilers
Easy to Install and Maintain New or retrofit, the Mini-Therm meets the need with an impressive array of built in features and reliable field proven components
Long Life Hybrid Heat ExchangerThe right combination of copper and cast-iron construction results in a light weight, responsive, and long lasting 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 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