8 HVAC Service Contractors in Johnston, IA
Top-Rated HVAC Service Contractors in Johnston
Schaal Plumbing, Heating and Cooling
“Of 5 reviewer excerpts available, 3 mention same-day or Saturday emergency availability, with Patrick specifically noting competitors could not match Schaal's…”
Kohles & Bach Heating & Cooling
“Technician names appear prominently in positive reviews. Philip restored a gas fireplace other contractors declined; Brandon earned praise for explaining…”
All HVAC Service Contractors (8 total)
Air Support Inc. Heating & Air Conditioning
“All 36 reviews award 5 stars, with reviewers consistently naming Andrew Vanfleet and praising his diagnostic…”
HVAC WIZARD
“All 9 reviews award 5 stars, with Ross mentioned by name in multiple reviews for technical skill and customer…”
Setpoint Mechanical
“All five reviewers awarded five stars, with one specifically praising the team's care with a large VTS air…”
Mechanical Sales Inc
“With only one publicly available client review describing positive interactions with staff, the review…”
HVAC Service Costs in Johnston
General HVAC service pricing across maintenance, repair, and installation in Johnston.
| Service | Low | Average | High |
|---|---|---|---|
Service call / diagnostic | $81 | $130 | $216 |
Routine tune-up (single system) | $76 | $135 | $216 |
Standard repair (avg) | $162 | $648 | $1,296 |
Major repair (compressor, heat exchanger) | $1,620 | $2,700 | $3,780 |
New system installation (mid-range) | $7,020 | $11,340 | $15,120 |
Full HVAC replacement AC + furnace combined | $12,517 | $14,504 | $15,228 |
Prices reflect continental metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
HVAC Service in Johnston, IA: What to Expect
Johnston sits in the Des Moines metro, and the climate delivers real challenges. Summers push toward 87 F with dozens of days above 90, while winters drop to around 13 F. That kind of range means cooling systems work hard from May through September and heating systems shoulder an equally heavy load when temperatures plunge. Fourteen contractors serve the area, and their collective reputation reflects that demand: an average rating of 4.8 across nearly 13,000 reviews. Homeowners searching for HVAC Service in Johnston are looking for teams that can handle both ends of that extreme.
Service calls run $81 to $216, while routine tune-ups for a single system typically cost $76 to $216. Standard repairs average $162 to $1,296, with final pricing depending on the specific issue and parts required. Iowa law adds another layer, since any contractor performing this work must hold or employ a Master HVAC license from the state's Department of Inspections, Appeals, and Licensing Plumbing and Mechanical Systems Board. That regulatory requirement shapes what you pay, as proper licensing and ongoing training represent real business costs that factor into each quote.
Customer feedback points to real differences in how quickly teams respond. Patrick at Schaal Plumbing, Heating and Cooling draws consistent mentions for same-day and Saturday emergency availability, with one customer noting competitors could not match that turnaround. Kohles & Bach earns praise for technicians like Philip, who restored a gas fireplace others declined to touch, and Brandon, who takes time to walk customers through options and pros and cons clearly. Smith's Sewer Service Inc. receives five stars from every reviewer, with specific technicians and same-day or holiday availability appearing across six sampled reviews, and response speed and clean work noted most frequently.