Welcome to Carlson Heating & AC, LLC's Manhattan geothermal resource center. We're proud to be one of the finest providers of geothermal products for the Manhattan area. Whether you need standard maintenance, equipment repair, or a complete comfort system - Carlson Heating & AC, LLC has the education and skills you need. Let us build you a solution that uses the clean, renewable energy in your backyard to provide savings up to 70% on heating, cooling and hot water.