Specifications

Heartland Owners Forum http://manuals.heartlandowners.org
Heating and Cooling Guide V1.pdf Page | 10 Version: 1, March 15, 2013
Dealing with Very High Outside Temperatures
Stay Ahead of the Heat
The most important thing you can do is to keep ahead of the outside temperature. Take advantage of
cooler morning temperatures and cool the interior to the lowest temperature you can tolerate. Then as
the heat load increases in the afternoon, even if the air conditioner can’t keep up, the trailer will still be
reasonably comfortable.
Cut the Heat Load
If possible, cut some of the heat load by opening your patio awning(s). Pick a trailer orientation so that
the afternoon sun is not directly on the largest windows. Consider closing the inside blinds/shades,
especially on the side facing the sun. Reflective material on those windows will also help.
Run the Bedroom A/C at Maximum Output
For trailers that don’t have the Whisper-Quiet system, you can still set controls so that the bedroom A/C
helps to cool the living room. Set the bedroom thermostat to a set point of 60 degrees. That will keep it
producing maximum output even after the bedroom gets cooled down. Leave the FAN setting on AUTO.
Redirect the Bedroom Air Flow
Close off the ceiling vents so that the living room A/C output is not wasted on the bedroom (see the
ceiling vent section later in the guide). Close the front louvers on the A/C unit and redirect the rear
louvers so that the air stream flows toward the living room.
Adjust the Living Room Thermostat
Because the redirected cold air stream will pass by the living room thermostat (usually located in the
hallway), you’ll need to adjust the living room thermostat set point to 60 degrees as well. This will keep
the living room A/C running at maximum. Leave the FAN setting on AUTO.
Run the Ceiling Fan
Since heat rises, warmer air from the living area rises to the ceiling and naturally flows toward the front
of the RV. Running the ceiling fan helps to circulate and distribute the air.
Dealing with Moderate Outside Temperatures
In moderately warm conditions where there’s not as much demand on the air conditioning units, a
different technique may be used with the thermostats.
During the daytime, set the bedroom thermostat to 74 degrees and the living room thermostat a bit
higher at 78 degrees. The bedroom A/C will come on first to remove the heat. The cooler air will
naturally flow down to the living room keeping it more comfortable. If it gets too warm in the living
room, the living room A/C will come on as needed to pick up the additional cooling load.
Reverse the set points at night so as to only start the bedroom A/C when it gets very warm, reducing the
noise in the bedroom while you’re trying to sleep.