Want to stay warmer for longer? The HS2000 is sufficient for most, but never hurts to have a little extra heat. Propex Heat source HS2800 propane fired, externally vented camping heater kit, 9700 btu, plenty of heat for even the coldest nights. If you are one who camps in your Westfalia with the top up in super-cold weather, this is the ticket! Very quiet operation, self-diagnostics, 1.9 amp current consumption. Two-year mfg warranty.