jlghome

We installed a 3 zone Mitsubishi unit without the Hyperheating Inverter technology in the Fall of 2012. The unit works fine as a heater down to about 7 degrees above zero. But it is not much good below that. We complained to Mitsubishi and they added a single zone exterior unit that featured the Hyperheating Inverter and it has so far functioned very well down to minus 10 degrees (it is -9 right now here in Indiana). The brochure found here: http://www.mitsubishipro.com/media/2264 ... ochure.pdf would seem to be an accurate description of the capabilities of the new technology. We recommend the unit with Hyperheating Inverter technology but avoid anything else if you want it to work in really cold weather!