Heating & air conditioning in Waterloo, IA
Furnace repair, AC service and new systems for Waterloo homes and rentals, from a veteran-owned family business just up Highway 218 in Janesville.
Your local HVAC company for Waterloo
Waterloo is the Cedar Valley's largest city, and a lot of its homes were built well before 1980. Older homes often mean older furnaces, boilers and ductwork that need a little more care. We work on everything from decades-old boilers to brand-new high-efficiency systems.
Many Waterloo customers are landlords. Greenley has experience maintaining more than 1,000 rental units, so we understand quick turnarounds and working with tenants. See our landlord program.
Services in Waterloo
💲 Affordable Replacement
Low-priced furnace and AC replacement. John quotes every job himself, with no sales team markup.
🔥 Furnace Repair
No heat, strange noises, cold air or a furnace that keeps shutting off. Free diagnosis, all brands.
🏠 Furnace Replacement
Honest repair-or-replace advice, properly sized systems and help with Iowa utility rebates.
❄️ AC Repair & Installation
Central air not cooling? Fast repair, or a right-sized new system when it's time.
♨️ Heat Pumps & Mini-Splits
Efficient heating and cooling, including dual-fuel setups built for Iowa winters.
🛠️ Boiler Repair
Hot-water and steam boilers in older Cedar Valley homes, kept running safely.
✅ $25 Seasonal Tune-Up
Spring AC and fall furnace inspection and cleaning. Catch problems before they strand you.
🚨 Emergency Service
Furnace quit on a cold night? After-hours emergency service is available. Call John.
Rebates for Waterloo homeowners
Waterloo homes served by MidAmerican Energy can qualify for 2026 instant discounts and rebates on high-efficiency furnaces, central AC, heat pumps and smart thermostats. See 2026 rebates.
Nearby towns we serve
- Evansdale
- Cedar Falls
- Hudson
- Gilbertville
- Raymond
- Dunkerton
- La Porte City
What Cedar Valley customers say
“John came right away after I phoned him to let him know my central air stopped working. He knew exactly what the problem was and had it fixed and working within thirty minutes. Everything was explained to me and his price was very affordable.”Danita G. · Google review
“He was amazing. No upsale, he just quickly replaced a part he already had in his van. Professional and skilled are the words I would use to describe him.”Stella · Google review
“John went above and beyond working on my AC unit. Even grabbed a hose to siphon water out of the unit and got it back up and running.”Beris C. · Google review