Mr. Heater Air Conditioner Selection Manual

1

How Much Heat Do You Need?

How Much Heat Do You Need?
Estimated Heating Area information included on
this guide assumes the area to be heated has a
10 ft ceiling.
If the area to be heated has a higher or lower
ceiling, calculate the amount of BTU's required
by using the following method:
1.
Measure the space's dimensions to determine
cubic feet. (Length x Width x Height = Cubic Feet)
2.
Subtract the outside temperature from the
desired inside temperature to determine the
temperature rise.
3.
Use the chart on the right to match the size of
the heating area (cubic feet) with the desired
temperature rise to find the amount of BTU's
required to heat your space.
2

What Type Of Heater Should You Buy?

What Type Of Heater Should You Buy?
By answering the following questions and using
this chart, you'll be able to determine which heater
is best to meet your heating needs.
1. Where will the heater be used?
There are portable heaters specifically designed
for safe indoor use as well as rugged heaters for
outdoor work sites and other outdoor activities.
2. How much heat do you need?
Heat outputs range from 3,800 to 400,000 BTU's.
3. What fuel is available?
Mr. Heater makes heaters for propane, natural
gas, and kerosene/diesel. Also notice that some
heaters require electricity.
CUBIC FEET BTU'S REQUIRED TO HEAT SPACE TO DESIRED TEMPERATURE
25,000 60K
20,000 48K
15,000 36K
10,000 24K
7,500 18K
5,000 12K
2,500 6K
CELSIUS 10ºC
FAHRENHEIT 18ºF
CHOOSE THE DESIRED TEMPERATURE RISE
* Example based on a temperature rise of 45ºF / 25ºC to heat approximately 10,000 cubic feet.
BUDDY SERIES
TANK TOPS
PORTABLE RADIANT
CONVECTION
FORCED AIR PROPANE
FORCED AIR KEROSENE
UNIT HEATERS
-40 -21 0ºC
TEMPERATURE
RISE = 42ºC
90K 120K 150K 180K
72K 96K 120K 144K
54K 72K 90K 108K
36K 48K 60K * 72K
27K 36K 45K 54K
18K 24K 30K 36K
9K 12K 15K 18K
15ºC 20ºC 25ºC 30ºC
27ºF 36ºF 45ºF 54ºF
+21 +40
240K
192K
144K
96K
72K
48K
24K
40ºC
72ºF
BTU/HR RATINGS
3,800-18,000
12,000-42,000
35,000-125,000
30,000-200,000
35,000-400,000
50,000-210,000
45,000-75,000