vacuum vented] [or] [multiple-burner vacuum vented].
2.2.3.1
Vent
NFPA 54 and NFPA 211, [Type 316 stainless steel] [or] [high-temperature
corrosion-resistant plastic rated for minimum 204 degrees C 400 degrees F].
Vent flue gas to outdoors by induced draft.
2.2.3.2
Reflector
[Polished [aluminum] [stainless steel]] [or] [approved high infrared
reflector materials]. Provide manufacturer's standard reflector supports.
2.2.3.3
Heat Exchanger and Combustion Chamber
Construct heat exchanger and combustion chamber of [aluminum-clad steel]
[ceramic-coated steel] [or] stainless steel.
2.2.3.4
Controls
Incorporate either an intermittent pilot ignition system or a solid-state
direct ignition system. Provide safety air-flow switch for each burner.
2.2.3.5
Fan or Vacuum Pump
Heater manufacturer's standard.
2.2.3.6
Performance
**************************************************************************
NOTE: Performance Criteria are:
Minimum Steady
Maximum Heat
State Thermal
Release (kJ
Efficiency
Per Square Meter
(Percent)
of Heating
Surface
Single-Burner
80
31,350
Power Vented
Heater
Single-Burner
80
33,060
Vacuum Vented
Heater
Multiple-Burner
85
23,940
Vacuum Vented
Heater
Minimum Steady
Maximum Heat
State Thermal
Release (BTU
Efficiency
Per Square Foot
(Percent)
of Heating
Surface
Single-Burner
80
2,750
Power Vented
Heater
SECTION 15760N
Page 11
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