Dometic Brisk Air Non-Ducted Heat StripDometic Brisk Air Non Ducted Heat StripThese add on Heat Strip Kits are rated at 5600 BTU to take the chill from chilly mornings and evenings. They are for non ducted systems and are easily installed in the ceiling assembly of your Duo Therm Brisk air or Penguin air conditioner. Important: This heat strip is compatible with the Dometic Brisk Air Non Ducted Models only. If you are in need of the heat strip for the Dometic Brisk 2 Non Ducted Models