Tonna Mechanical: Heating, A/C, Water Treatment, Plumbing & Duct Cleaning

Tonna Mechanical operates as a full-spectrum home systems contractor serving Rochester and the surrounding Olmsted County region. The company holds state licensing in both HVAC and plumbing, offering 24/7 emergency availability every day of the week. With a rating of 4.9 stars drawn from over 3,500 customer reviews, Tonna has built a substantial reputation in the area, performing everything from historic boiler retrofits to new construction mechanical installs. The business maintains separate divisions for heating and cooling, indoor air quality, plumbing, water treatment, and duct cleaning, allowing technicians to specialize within their trade rather than attempting to master all disciplines.

What distinguishes Tonna from regional competitors is their multi-trade capability under one roof, a homeowner can address heating, cooling, water softening, and drain cleaning through a single service call. The company handles both residential and commercial projects, and their website references smart thermostat integration alongside traditional equipment. Their air quality division includes duct cleaning and sealing services, which many HVAC shops sub-contract out. The water treatment segment offers whole-house softening and drinking water systems, addressing a common concern in southeastern Minnesota where hard water mineral buildup shortens water heaters and plumbing fixtures.

Customer reviews name specific technicians who handled notable situations. Mr. H Shultz performed a plumbing inspection and subsequently rerouted water lines for a whole-house soft water system, completing the work quickly at a competitive price. A review from October 2025 describes a challenging retrofit of an entirely new HVAC system in an 1896 home, a project that took multiple crew members three and a half days. One reviewer noted their basement was left with standing water after a plumbing job, and another reported incomplete grounding wiring on a Carrier furnace installation that failed inspection, with follow-up promises never fulfilled. These mixed experiences suggest communication gaps on certain jobs, even as many customers report thorough explanations and professional service.