Contact Us Carlson Heating & AC, LLC 617 Bridge Street Clay Center, KS 67432 785-632-2010 Thank you for your interest in Carlson Heating & AC, LLC and a geothermal comfort system. Please fill out the form below and someone will contact you shortly. We'll answer any questions you have and can provide you with a free estimate for your unique geothermal situation in Manhattan and the surrounding region. Required Required Not a valid email Required Not a valid phone number Favorite Comedian Fire or Ice Height in meters