5 Commercial HVAC Contractors in Johnston, IA
Top-Rated Commercial HVAC Contractors in Johnston
Kohles & Bach Heating & Cooling
“Technician names appear prominently in positive reviews. Philip restored a gas fireplace other contractors declined; Brandon earned praise for explaining…”
Air Support Inc. Heating & Air Conditioning
“All 36 reviews award 5 stars, with reviewers consistently naming Andrew Vanfleet and praising his diagnostic skill. Multiple customers describe same-day or…”
All Commercial HVAC Contractors (5 total)
Setpoint Mechanical
“All five reviewers awarded five stars, with one specifically praising the team's care with a large VTS air…”
Commercial HVAC Costs in Johnston
Commercial system pricing in Johnston. Actual costs vary significantly by building size and system type. Request a site-specific quote.
| Service | Low | Average | High |
|---|---|---|---|
Annual maintenance (per rooftop unit) Quarterly inspections | $550 | $1,100 | $2,200 |
Annual contract (small business, < 5K sqft) | $1,100 | $2,750 | $5,500 |
Annual contract (mid-size, 5K-25K sqft) | $3,850 | $7,150 | $11,000 |
Basic rooftop unit replacement | $7,150 | $11,000 | $16,500 |
Small business full system (< 5K sqft) | $8,800 | $17,600 | $27,500 |
Mid-size building (5K-25K sqft) | $27,500 | $55,000 | $88,000 |
Operating cost (per sqft annually) Utility + maintenance | $2 | $4 | $7 |
Prices reflect continental metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
Commercial HVAC in Johnston, IA: What to Expect
Johnston sits within the Des Moines metro, exposed to Iowa's classic continental swings , summers hit 87 F with 32 days above 90 F, while winters average 13 F. That temperature range keeps heating and cooling systems running nearly year-round in any commercial building. Five contractors serve the area, maintaining a 4.9 average rating across 2,454 reviews , a remarkably high bar for Commercial HVAC in Johnston businesses.
Service costs in Johnston reflect system complexity and building size. Annual maintenance for a single rooftop unit ranges from $550 to $2,200, while small business contracts under 5,000 square feet cost between $1,100 and $5,500 annually. Mid-size facilities between 5,000 and 25,000 square feet see annual contracts from $3,850 to $11,000. Iowa law requires all HVAC contractors to hold proper licensing from the state's Department of Inspections, Appeals, and Licensing through the Plumbing and Mechanical Systems Board to operate legally.
Local reviews surface clear patterns. Philip at Kohles & Bach revived a gas fireplace other contractors declined to touch, while Brandon earned praise for laying out options and their tradeoffs clearly. Andrew Vanfleet of Air Support Inc draws consistent mention for diagnostic skill, with multiple customers noting same-day or emergency response during heat advisories. Ross at HVAC Wizard appears by name across several reviews for technical ability and transparent communication, with reviewers frequently citing same-day response during heat waves.