475 High Performance Bldg Sply on Instagram: "Designed for cold climates, Lunos systems perform effectively down to -10°F when operated continuously at low to medium speeds and with sufficient indoor warmth. Conveniently, if ever you do want to turn the unit off due to extreme weather conditions such as high winds, wildfire smoke or super-low temperatures, you can simply turn off the switch and close the interior cover to manage the system and stay comfortable. Lunos HRV systems maintain an airt