About Us

Mark Koenigseder of J&K Heating and Air Ventilating, Inc. grew up in the heating and air business, as a second generation Fort Smith HVAC specialist. Some things have changed since the Koenigseder family started working in this field. Mark founded this HVAC company to add an energy efficient, eco-friendly approach to the trade.

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Our Services

Air Conditioning Services in Fort Smith, Van Buren, Greenwood & Alma, AR

Air Conditioning

AC installation in Fort Smith, Arkansas is vital to comfort, safety, and quality of life.

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Heating Services in Fort Smith, Van Buren, Greenwood & Alma, AR


Heater installation, Fort Smith, Arkansas is integral to the comfort and lifestyle of your family.

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Indoor Air Quality in Fort Smith, Van Buren, Greenwood & Alma, AR

Indoor Air Quality

Indoor Air Quality in Fort Smith, Van Buren, Greenwood, Alma, AR, and Surrounding Areas

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Ductless HVAC in Fort Smith, Van Buren, Greenwood & Alma, AR


Ductless systems can eliminate a substantial number of particles in the air that affect the indoor air quality, environment comfort and safety for

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Our Happy Clients