Airstream NTERSTATE - Manual (Page 48)

D
CAMPING
D - 11
1. You must have a plentiful supply of propane gas as the heat from the furnace
warms the motorhome and keeps the fresh water lines and tank from freezing.
2. If your stay is longer than overnight, you should endeavor to have 120-volt elec-
tricity available. The house battery, fully charged, will not last more than about 15
hours in freezing weather, less with use of the holding tank heating pad. Of course,
you can run your generator to recharge the battery, or even use the generator
continually. Since the generator starts off the house battery, it is recommended to
start the generator prior to running the battery down.
3. Minimize use of electricity if 120-volt power source is not available.
4. Leave cabinet doors, wet bath doors and wardrobe doors slightly open at night to
allow circulation of air in and around all components
5. Use propylene glycol type antifreeze in wastewater tank to prevent freezing.
Quantity of antifreeze needed will vary with ambient temperature and the amount
of liquids in tank.
6. For extended stays in cold weather, insulate the water line outside the motorhome.
You should remember that low temperatures in combination with high winds cause
an equivalent chill temperature much below what your thermometer is reading. For
instance, with an outside temperature of zero degrees, and the wind velocity of 10
miles per hour, the equivalent chill temperature is minus 20° F. The exterior water
faucet has an in-line valve inside the motorhome. In below freezing temperatures,
shut off the valve inside and open the exterior brass valve so it will drain. See the
valve section in this book for locations.