Sigman Heating & Air Conditioning, Inc.

Sigman Heating & Air Conditioning, Inc. has served the Belleville, Illinois community for over four decades as a family-owned HVAC contractor, maintaining an impressive 4.6-star rating across 122 customer reviews. The company handles residential heating and cooling systems, including central air conditioning, forced-air furnaces, and traditional radiator-based heating. Technicians at Sigman also maintain expertise in gas boiler systems and modern geothermal heat pump installations, positioning them as a versatile option for homeowners with diverse heating equipment. The contractor operates Monday through Friday from 7 AM to 5 PM, providing scheduled maintenance and repair services throughout the Metro East region.

What distinguishes Sigman Heating & Air from neighboring contractors is their breadth of system expertise across multiple heating technologies. Unlike shops that specialize exclusively in modern heat pumps or traditional forced-air systems, Sigman's technicians regularly service both contemporary geothermal setups and older gas-fired radiator systems. This versatility proves particularly valuable in Belleville's historic neighborhoods, where homes often feature aging boiler equipment alongside newer cooling installations. The company employs named technicians including Sam, Zack, Joe, and Nick who handle everything from routine AC tune-ups to complete boiler replacements.

Customer reviews highlight specific technician interactions that demonstrate Sigman's service approach. Christopher Garcia awarded five stars after Sam resolved issues across both his central AC and his gas boiler radiator system, praising the troubleshooting quality and professionalism. Larry J Scott described a full-day boiler installation by technicians Zack, Sam, Joe, and Nick, calling them a wonderful group. However, one new construction customer reported significant challenges with a geothermal system installation, noting repeated damper failures and difficulty reaching owner Joel Sigman for warranty support. These mixed experiences suggest homeowners should clarify warranty terms and get written commitments before large projects.