Here’s a single system to both cool and heat 3 interior spaces. The MRCOOL DIY 48k BTU 20.5 SEER 3-Zone Ductless Heat Pump Split System–12k plus 12k plus 24k, is an easy install system you can install yourself without expert help. The MRCOOL DIY Ductless Split System can cool like an air conditioner, but is actually a heat pump by design. When heating your home, this means the appliance reverses the air conditioning process and pulls in heat from the outdoors. The system also includes a variable speed DC inverter. with a 48k BTU heating capacity, this system includes two 12k BTU air handlers that can heat or cool a space up to 500 sq. ft., as well as a 24k BTU handler that can cover 1000 sq. ft. Color: White.