Mark’s Heating & Cooling, Inc.
3530 N. Riverline Drive
Oconomowoc, WI 53066
High Efficiency that SAVES you MONEY - IIS 90 Series Gas Furnace - DXT+ Two-Stage Heat Pump - Trinity Ti Boiler & Water Heater - ENERGY STAR


Mark's Heating is an authorized dealer of Heil Heating & Cooling Systems and NTI water heaters for Oconomowoc Wisconsin located in Lake Country area Wisconsin.

IIS 90 Series Gas Furnace - Compared to single-stage furnaces—which heat up and shut down quickly, leaving your home either too hot or too cold— the Heil® QuietComfort™ IIS 90 two-stage gas furnace provides remarkably even heat. When the weather gets colder, the higher stage kicks in—increasing the speed of the circulation motor and the output of the burners for greater warmth and comfort. read more

DXT+ Two Stage Heat Pump - Designed to deliver the ultimate in cool, quiet comfort, the Heil® QuietComfort™ DXT+ heat pump is the ideal partner for a QuietComfort 80% or 90% AFUE† variable speed, two-stage gas furnace or variable speed fan coil. A variety of features make the DXT+ one of the quietest heat pumps around. read more

Click Here for Heil Warranty Information

Trinity Ti Boiler & Water Heater - When you choose the TRINITY Boiler, you choose the ultimate in top-quality, high-efficiency boilers. Count on years of trouble-free, safe and comfortable heat, from North America’s hot water heating leader: NTI. read more

Please contact or call us today for a FREE estimate for all of your heating and cooling needs.

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Phone: 262.567.6829 - Fax: 262.567.8220 - Email: