Per page four of the owner's manual (available on line), if hung horizontally, it needs to be 8" from the sides and 4" from the ceiling. If angle mounted at 45 degrees, it needs to be 4" from the wall and 4" from the ceiling.
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SunStar Heating Products Garage Tube Heater - 25,000 BTU, Natural Gas, 110in. Length, Model# SIR25-15-N

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- Compact size: overall length is 110in. for ease of installation
- Efficiencies range up to 84.5%
- Installation as low as 8ft. above floor
- CSA design certified
- Vacuum System pulls combustion products through the combustion chamber for greater safety, virtually eliminating the possibility of combustion gases leaking into the heated space
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Key Specs
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Product Summary
NOTE: In residential garage applications, the heater must be vented outside through sidewall or the roof. In commercial/industrial space heating applications, the heater can be indirectly vented (optional exhaust hood sold separately). Please review the detailed Installation Operating Instructions (attached) for other specific installation requirements (gas pressure, ventilation etc.) prior to purchasing the heater.
What's Included
- (1) Garage tube heater (1) 36in. stainless steel flexible gas connector
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Features + Benefits
- Compact size: overall length is 110in. for ease of installation
- Efficiencies range up to 84.5%
- Installation as low as 8ft. above floor
- CSA design certified
- Vacuum System pulls combustion products through the combustion chamber for greater safety, virtually eliminating the possibility of combustion gases leaking into the heated space
- Solid State Ignition System offers reliable electronic direct spark ignition system with 100% gas safety shutoff control and 30-second pre-purge
- 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
- Heavy-duty combustion chamber
- Aluminum reflectors with 97% reflectivity rating
- Diaphragm safety switch for proof of venting and system indicator lights
- Includes 36in. stainless steel flexible gas connector
- 4in. round flue connection
- 120VAC, 60HZ, 2.4 Amps
Key Specs
| Attribute | Specification |
|---|---|
item# | 16268 |
Brand | SunStar |
Manufacturer's Warranty | 1 year limited warranty |
Ship Weight | 90.0 LB |
Heat Output | 25,000 Btu/hour |
| Attribute | Specification |
|---|---|
Heat Type | Radiant |
Blower Included | No |
Amps | 0.2 |
Thermostat Included | No |
Reviews
Questions & Answers
Questions
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· 10 years ago
Minimum Standoff Distance?
How far away does this need to be mounted from walls and ceilings. I assume the heating capacity is 500 sq ft, not 5,000...
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hdmike· 8 years ago
Helpful?
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ProductExpert37· 10 years ago
The clearances for this Sun Star garage tube heater are 8" on all sides, 4" from the ceiling and 41" below the heater. The side clearance is 12” when installed in an UNVENTED configuration in industrial and commercial installations. The heating capability is between 500 and 1,000 square feet.
Helpful?
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· 3 years ago
Many square feet will this unit cover
1 answer-
ProductExpert6· 3 years ago
The heater would heat approximately 5000 square feet.
Helpful?
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· 3 years ago
Will this work if the power is off. Can it be lit manually?
1 answer-
ProductExpert6· 3 years ago
The model SIR25, item #16268 requires to be wired to 120VAC in order to operate. It cannot be operated manually. Be sure to follow all clearance instructions listed in the product manual.
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· 4 years ago
How loud is this heater?
1 answer-
ProductExpert29· 4 years ago
The manufacturer does not test this heater for Decibel ratings.
Helpful?
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· 5 years ago
What is distance to combustibles above and below?
1 answer-
ProductExpert31· 5 years ago
This heater requires a clearance of 4" above the heater and 41" below the heater.
Helpful?
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· 5 years ago
Can this be used in a greenhouse?
1 answer-
ProductExpert11· 5 years ago
The heater would not be recommended to be used in a greenhouse.
Helpful?
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· 6 years ago
can this be used in a paint booth?
1 answer-
ProductExpert7· 6 years ago
This cannot be used in a paint booth as that may cause damage to the heater or result in poor combustion.
Helpful?
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· 7 years ago
Can the unit be in a wash bay?
1 answer-
ProductExpert40· 7 years ago
This unit could be used in a wash bay as long as it does not receive any direct spray and it has outside venting.
Helpful?
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· 9 years ago
Can this be converted to propane or is there a propane equivalent model.
1 answer-
ProductExpert18· 6 years ago
A propane model is available, please see item #16267.
Helpful?
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Accessories We Recommend
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Warranty
Manufacturer's Warranty
1 year limited warranty
Extend Your Warranty Coverage with a Northern Protection Plan (NPP)
Repair Plan — 1 Year
A Northern Protection Plan is available after adding the product to your shopping cart.
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Specifications
25,000 Btu/hour
10,000 Btu/hour
25,000 Btu/hour
140,000 Btu/hour
Radiant
Infrared
Radiant
Infrared
No
No
No
No
0.2
1
-
1.1
No
No
Yes
No
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29.75 x 12.25 x 7 in
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