John J. Cahill Plumbing, Heating & Air Conditioning

John J. Cahill Plumbing, Heating & Air Conditioning operates as a licensed plumbing and HVAC contractor serving Evanston, Illinois and surrounding communities. With 74 customer reviews contributing to a 4.1-star average rating, the company has established a consistent track record in residential service delivery. The business maintains 24-hour availability across all seven days, enabling response to emergency calls regardless of timing. Operating under the Cahill Inc. name locally, the contractor handles installations, repairs, and maintenance across plumbing systems, heating equipment, and air conditioning units.

The contractor demonstrates particular expertise in hydronic heating applications. Reviewers describe installations involving Triangle Tube boilers paired with passive hot water tanks, eliminating separate water heating infrastructure. The company has also installed water-based radiant floor heating systems integrated with existing boiler equipment, providing whole-home heating without traditional radiators. This dual-capability approach to both forced-air and radiant heating systems positions the contractor as a specialist in older Evanston homes where radiator infrastructure coexists with modern renovation needs.

Customer reviews reference specific technicians who delivered the work. Carrie Thiergart described receiving same-day service for a sewer scope and rodding job when facing a contract deadline during her home sale process, with the team arriving the following morning as promised. John Moore's review details a multi-project engagement spanning 12 years, including a high-efficiency Triangle Tube boiler installation connected to a passive hot water tank and a kitchen radiant floor heating system, both described as operating flawlessly post-installation. MargaretO's experience involved careful diagnostic work on a difficult-to-access furnace, with options presented without sales pressure and thorough testing after the repair.