Mini-Split Ductless Heat Pumps from Keystone Heating & Air Conditioning Co., Inc Help you Manage Warm Summers and Cold Winters in Racine Whether you need comfort boost in one room, two rooms, three rooms, or even four rooms, Keystone Heating & Air Conditioning Co., Inc in Racine has a mini-split heat pump to meet your needs. Our mini-split heat pumps from Lennox® deliver suberbly efficient and very quiet performance year after year. Their ductless design erases the possibility of complicated installation problems or expensive modifications down the road. What’s more, their efficient, all-in-one heating and cooling system ensures your home stays comfortable all year long. Explore the models we offer. If you want service for your mini-split heat pump or need a new unit, Keystone Heating & Air Conditioning Co., Inc in Racine is ready to serve you. Call us at 262-358-9468 or schedule an appointment with us using our online scheduler. * SEER, or Seasonal Energy Efficiency Ratio, measures the cooling efficiency of your air conditioner or heat pump. A higher SEER rating means greater energy efficiency and more savings for you and the environment. ** HSPF, or Heating Seasonal Performance Factor, measures the heating efficiency of your heat pump. A higher HSPF rating means greater energy efficiency, more savings and is better for the environment.