One Hour Heating & Air Conditioning
About One Hour Heating & Air Conditioning
One Hour Heating & Air Conditioning of Johnson County provides residential HVAC repair, installation, and maintenance in Olathe and Johnson County. Founded in 1987 by Ramon Blachly, the family-run business transitioned to a One Hour franchise in 2004 and is now led by his son, Jonathan Blachly. Services include air conditioning, heating, furnaces, heat pumps, thermostats, ductwork, indoor air quality, boilers, geothermal systems, and emergency HVAC repairs. The company offers 24/7 emergency availability, financing, upfront job estimates, and appointment windows backed by an on-time service promise. Its service trucks carry commonly needed tools and parts, allowing technicians to diagnose and address many system problems during a visit.
At a glance
- Trades
- HVAC
- In business
- 39 years (since 1987)
- Service area
- Olathe, Johnson County
- Address
- 1804 E 123rd St, Olathe, KS 66061
- Highlights
- Financing availableEmergency service
Services
- AC Installation & Replacement
- AC Repair
- Air Conditioning
- Boilers
- Duct Installation
- Duct Repair
- Duct Sealing
- Ductwork
- Emergency HVAC Services
- Furnaces
- Geothermal
- Heat Pumps
- Indoor Air Quality
- Thermostat Repair
- Heating
How the 90 score breaks down
Scores are calculated the same way for every company. See the method.
What customers say
Javier did a great job with the maintenance on our HVAC unit!
Google review, Oct 31, 2026
Frank was courteous and helpful. Everything went well. Future options were given for upgrades.
Google review, Oct 30, 2026
Read all 3,939 reviews on GoogleCaden was excellent and I even learned something about filters from him today. Always love the service we receive from the techs at One Hour. Thank you
Google review, Oct 30, 2026
Rating distribution and reviews from the company's public Google listing.
Other top HVAC companies near Olathe
- Buckner's Heating, Cooling, and PlumbingScore 92 · 5.0★ (1,339)
- Patriot Heating, A/C & PlumbingScore 88 · 5.0★ (940)
- Air Care Heating & CoolingScore 85 · 5.0★ (1,619)
- Town & Country Heating And Cooling Co.Score 84 · 5.0★ (1,153)