Types of heater: Gas
Why Use Gas-fired
Heating Equipment
 Most economical heating source
 Wide variety of equipment available
 Most common source of heating in all
applications
 Available far into the future
Types of Gas Heating Equipment
Permanent, Direct-fired

Roof top
“Make-up air” style
 No loss of energy
out the flue vent
 Low temperature
discharge
 Contained flame
 Equipment out of
the way
Types of Gas Heating Equipment
Temporary, Indirect-fired

Large physical size for
amount of heat output


Contained flame


Limited uses

Minimal clearance from
combustibles
Requires venting - loss of
energy
Lower discharge
temperatures
Types of Gas Heating Equipment
Temporary, Direct-fired

“Tube-type” style
 Higher discharge
temperatures, relative
to CFM, with hot spots
as high as 700°F
 Open flame
 Greater clearance
from combustibles
 Low CFM of air
Types of Heating Equipment
Temporary, Direct-fired

“Make-up air” style
 Lower temperature
raise, from 90°F low
fire to 220°F high fire
 Contained flame
 Minimal clearance
from combustibles
 Expansive range of
styles and sizes
 Highest fuel efficiency
Gas (Propane / Natural)
Advantages
Least expensive energy cost
Propane at $.80/gallon = $8.64/1M BTU’s
Natural gas at $.50/therm = $5/1M BTU’s
Largest range of equipment available
Versatile & portable
Gas (Propane / Natural)
Advantages Con’t.
Low electrical requirement
1M BTU unit = 460 volt/10 amp
Low installation cost
High temperature rise
Gas (Propane / Natural)
Disadvantages
Some codes may not allow gas fired
equipment or propane
May not be safe to use in certain areas
or buildings