I really like the Ring Alarm product and it has allowed me to migrate from a wired ADT system to a homeowner install friendly environment. However, my original wired system allowed me to have 135 degree F heat detectors in the garage and furnace room where a smoke detector is inappropriate. I purchased the retrofit panel in hopes of using it with the Normally Open heat sensors to replace this function. However, I discovered the retrofit kit doesn’t accomodate Normally Open circuits. I just placed an order for NC Heat Sensors and hope that it will work with 2K line terminating loads. Regadless, my hope is that Ring will consider adding Heat Detector/Alarms to the product offering.