Harster Heating & Air Conditioning

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    Driving HVACR technology innovation.

    Emerson Climate Technologies is the world’s leading provider of heating, ventilation, air conditioning, and refrigeration solutions for residential, industrial, and commercial applications.

    We combine technically superior products and services from our industry-leading divisions and brands with our global engineering, design, distribution, installation, and monitoring capabilities to create reliable, energy efficient climate systems that improve human comfort, safeguard food, and protect the environment. Emerson Climate Technologies is at the forefront of industry-propelling ideas and innovations.

    Our Vision Emerson Climate Technologies, with our partners, will provide global solutions to improve human comfort, safeguard food and protect the environment.

    Our Mission To become the industry's steward and trusted partner by:

    • - Becoming an incredibly easy company to do business with through eBusiness and a culture of customer service
    • - Expanding our technology leadership position
    • - Using our broad capabilities in products and services to develop unique, high-value integrated solutions
    • - Being the best value provider for products and services
    • - Maintaining a safe work environment where our people and their ideas flourish

    Innovative engineering solutions can improve your bottom line and keep you on top of the game. At Emerson Climate Technologies, we strive to help you meet the challenges of change and the demands of adaptability.

    Discover some of the strategies, systems and solutions we have integrated to help our customers stay agile and move forward.


    To learn more, call us today at 314-631-5300 or email us here. We will reply within 24 hours, Monday-Friday.


    For home or business, heating and cooling and installation.

    Call Harster for a free estimate.


    Send us an email!

      Contact Us

      9900 Gravois Road

      St. Louis, MO 63123

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