After Lennox introduced VRF in 2012, they have continued to expand and improve the capabilities of their system. We are excited to introduce their new low ambient control. At ambient temperatures as low as -13°F, the VRF system is still able to provide 75% of its rated heat capacity. That is 53% higher than a traditional heat pump! Please consider Lennox as your VRF provider, and ask our ACP Engineering Team for assistance next time you need a system design.