Vacuum System
Products of combustion are pulled through the combustion chamber for greater safety
. . . virtually eliminates the possibility of combustion gases leaking into the heated space.
Solid State Ignition System
Reliable electronic direct spark ignition system with 100% gas safety
shut-off control and 30-second prepurge . . . safety and efficiency assurance.
U-Tube Design
Provides uniform emitter tube temperatures and energy distribution on the floor . . . unlike
straight tube heaters which are always hotter at the burner end than at the exhaust end.
Warranty
5-year limited combustion chamber warranty.
Other Features
Heavy-duty combustion chamber, aluminum reflectors with 97% reflectivity rating,
diaphragm safety switch for proof of venting, and system indicator lights.

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SIR Technical Specifications

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SIR Dimensions Chart

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SIR Supply Requirements

Electrical Requirements: 120 VAC, 60 HZ, 2.4 amps. Flue connection: 4" round. Optional outside combustion air connection: 4" round.

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SIR Clearance to Combustibles

	Model No.	Mounting Angle	Side Front	Side Rear	Ceiling	Below	Ends
	SIR 25	0°	8"	8"	4"	41"*	12"
	SIR 25	45°	30"	4"	4"	41"*	12"
	SIR 35 or 45	0°	12"	12"	4"	57"**	12"
	SIR 35 or 45	45°	40"	4"	4"	57"**	12"
	* 33" with deflector **42" with deflector

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SIR Model Selection Guidelines

	Properly selected heaters will provide the most efficient operation for your installation. The models recommended are selected for a 22' x 28' two-car or a 26' x 32' three-car insulated garage. Select the model number corresponding to the geographic location in which the heater will be installed. Model size is determined by garage heat loss. Please consult your SunStar distributor to determine the heat loss for your particular application.
	Zone Model
	I and II	SIR 25
	III and VI	SIR 35
	IV and V	SIR 45

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