Mainline’s Ultra-Heat multi-zone systems are built for extreme cold climates, offering reliable heating even at temperatures as low as -31°F. Featuring a high-efficiency G10 inverter-driven compressor and eco-friendly R-410A refrigerant, these advanced systems include drain pan and crankcase heaters to ensure peak performance in harsh conditions. With support for up to five zones and multiple indoor unit styles—wall-mounted, slim duct, cassette, console, or universal mount—this system provides the ultimate in flexible, energy-efficient comfort throughout your space.
