Mills Inc
HVAC
Serving Charles City, IA
From Google Business Profile
4.7
23 Google reviews
Hours
| Monday | 8 AM–4:30 PM |
| Tuesday | 8 AM–4:30 PM |
| Wednesday | 8 AM–4:30 PM |
| Thursday | 8 AM–4:30 PM |
| Friday | 8 AM–4:30 PM |
| Saturday | Closed |
| Sunday | Closed |
Google categories: HVAC contractor, Air conditioning contractor, Air conditioning repair service, Furnace repair service, Heating contractor, Plumber
View on Google Maps →Last checked October 3, 2026.
More from Google Business Profile
Listed features
- Offerings
- Installation service
- Repair services
- Service options
- Onsite services
- Online estimates
Photos on Google: 3
Recent Google reviews (excerpts)
Written by Google users, not by EdgeLocal. EdgeLocal has not verified them and does not show reviewer names.
5 out of 5 stars · Nov 2025 · Owner replied
I had Mills Inc replace 2 bathroom sink faucets, check furnace and work on both of my toilets. One of my toilets ended up needing replaced and they went way above and beyond to make sure everything was good! They could not have been nicer…
5 out of 5 stars · Jul 2025 · Owner replied
Very quick to set up an appointment. Nate showed up and diagnosed my problems very quickly and within an hour all was done and my units were working like new! I couldn’t be more satisfied. Nate was very professional and a very polite young…
5 out of 5 stars · Jan 2025 · Owner replied
I called Tuesday afternoon talk with Calvin after sending some pics of work I needed done, had a plan together and the guys was at my house the next morning, got the job done in a hour, so happy with the work and the fast response
The owner replied to 5 of the 8 most recent reviews Google showed.
From Google Business Profile, last checked October 3, 2026.
About this business
Mills Inc provides Geothermal, Plumbing, Pump Service and Septic Services to the Charles City, IA area.
Services
- Geothermal
- Plumbing
- Pump Service
- Septic Services
- Furnace Installation & Repair
- AC Installation & Repair
- Commercial HVAC Services
- Emergency HVAC Repair
- HVAC Maintenance Plans
- Hydronic Heating
- Well pump repair
- Septic installation
- Commercial furnace repair
- Commercial AC service
- Rooftop unit repair
- System troubleshooting
- Equipment replacement
- Thermostat and control service
- HVAC system upgrades
- Seasonal tune-ups
Service area: Charles City, IA, Nashua, Rockford, Marble Rock
- In business since
- 1963
- Experience
- Since 1963
- Licensing
- State Licensed, licensed HVAC technicians
- Insurance
- Bonded
- Emergency service
- Emergency HVAC Repair
- Estimates
- Free Phone or On-Site Consultations
Brands and certifications: Lennox Dealer
Source: the business's own website and its Google Business Profile description, read automatically on October 14, 2026. Not verified by EdgeLocal.
Iowa Contractor Registration
- Reg. #
- C130086
- Expires
- June 30, 2029
This registration number is published on the business's own website.
Source: Iowa Division of Labor contractor registration data, licensed under CC BY 4.0. Look up this registration
About hvac contractors in Charles City
HVAC contractors install, service and repair furnaces, air conditioners, heat pumps and ductwork. HVAC contractors replace furnaces and central air conditioners, install heat pumps and ductless mini-splits, perform seasonal tune-ups, seal and balance ductwork, add humidifiers and air filtration, and respond to no-heat emergencies.
Typical cost: $5,500–$14,000 for a furnace or central AC replacement. See the full cost guide
Typical U.S. ranges from industry sources (2024–25); not EdgeLocal data. Your quote will vary with scope, materials and location.
Questions to ask this contractor
- Ask for a load calculation: A Manual J calculation sizes equipment for your actual home.
- Compare equipment line by line: Match model numbers, efficiency ratings and warranty terms across quotes.
- Verify mechanical licensing: Iowa and several neighboring states license HVAC/mechanical work.