Call 24/7 for emergency service 209.485.9138

Atwater - HVAC Technician

Your local One Hour Heating & Air Conditioning has been serving the Merced & Stanislaus Counties area since 1992. We promise prompt and professional service to all of our customers. "Always on time, or you don’t pay a dime."™ We look forward to solving all your heating and air conditioning repair, installation and service needs. Call us now to schedule an appointment.
To visit our local Heating & Cooling Website Click Here.
370 Air Park Road Atwater, California 95301 License Number: 657111
Available 24/7

    ARMS One Hour Heating & and Air Conditioning ® is a family-oriented air conditioning and heating contractor serving residential customers with professionalism, personal service and guaranteed satisfaction.

    We value mutual respect for people and their property, cleanliness, and take great pride in caring for our clients.

    We all share the responsibility of making One Hour Heating & Air Conditioning ® - Atwater a great place to work and the best company to do business with resulting in satisfaction for all.

    Locally Owned …..…Personally Responsible .......

    Sweethearts since High School, Shelly D. Haase, Sr. and his wife Connie grew up in the SF Bay Area and settled in the Central Valley in 1991. They were married May 29, 1971 and blessed with four sons. Shelly Jr. also works in the company and is poised to provide continuity to the business for years to come.

    Shelly and Connie started ARMS Air Conditioning and Heating in 1992 and have been providing responsible, family-style services with corporate vigor to thousands of wonderful clients since then. The company joined the One Hour Heating & Air Conditioning ® family in 2010.

    The Haase family lives in Atwater and accepts the responsibility for the satisfaction of their clients and the safety and well-being of their employees.

    All of us at ARMS One Hour Heating & Air Conditioning ® are committed to creating a raving fan out of each client we are fortunate enough to serve.


  • Awards and Affiliations

    • 2005 Plaque Award - Atwater Yourth Baseball

    • 2006 Plaque Award - Atwater Youth Baseball

    • 2009 Men's Summer Softball Team - Appreciation Award

    • 2008 Certificates of Recognition

             * Certificate of Recognition - Atwater Chamber of Commerce Entrepreneur Quarter

             * Certificate of Recognition - Member of Congress of United States, Dennis Cardoza, 

             * Certificate of Recognition - City of Atwater, Lesa Rasmussen, Mayor Pro Tem


    * Specializing in Residential Sales, Service and Replacement – We are the premier full-service cooling, heating and air quality resource
     * Infrared Camera Heat Exchanger Safety Inspection – doing a complete inspection of your furnace and a carbon monoxide check to insure that you and your family are safe in your home!

    * No Surprise Guarantees – means you pay a small diagnostic fee no matter how complex your problem is, no matter how long it takes to identify it. After diagnosis, your service technician will explain all your repair options and our Straightforward Pricing™


    • Air Conditioners
    • Air Handlers
    • Ductwork
    • Furnaces
    • Heat Pumps
    • Indoor Air Quality
    • Maintenance Agreements
    • Thermostats
    • Air Purification
    • FREE System Replacement Estimates
    • Water Heaters

    • Atwater
    • Ballico
    • Ceres
    • Cressey
    • Crows Landing
    • Delhi
    • Denair
    • El Nido
    • Gustine
    • Hilmar
    • Hughson
    • Keyes
    • Le Grand
    • Livingston
    • Merced
    • Modesto
    • Riverbank
    • Salida
    • Turlock
    • Winton

    We're sorry, but looks like we don't have any special offers listed for your location at this time.  Please call your local One Hour Heating & Air Conditioning at 209.485.9138 to see if any new offers are available for you!

  • Maintenance Program

    The One Hour Heating & Air Conditioning® maintenance agreement, Comfort Club™, provides you with regular system checks. 

    A Comfort Club™ agreement will keep your system running at its peak.


A family of home services:

Strong partnerships and a national support system.

Independently owned and operated.