SPECIFICATIONS
Infrared Gas Heaters For Industry Since 1958
LOW INTENSITY
ETS/ETU Series Tube Heaters
ETU Series
ETS Series
SPACE-RAY®…A TRUSTED NAME IN INFRARED HEATING
At Space-Ray, industrial comfort heating is a challenge we take seriously. We have
been manufacturing gas-fired infrared heating systems since 1958. The quality and
performance of our heaters are based on over 45 years of field experience and expo-
sure to a wide variety of industrial heating problems. Our reputation is built upon a
solid track record for providing radiant efficient, easy-to-install, and high quality infrared
heating equipment.
Space-Ray infrared tube heaters are ideal for complete building heat or even spot
heating needs. The best applications include: manufacturing plants, warehouses,
auto dealerships, aircraft hangars, loading docks, weld shops, truck or auto service
areas, car washes, fire stations, greenhouses, gymnasiums, garages, machine
shops, tennis courts, swimming pools, maintenance shops, farm buildings and many
many more.
HEATING TECHNOLOGY FOR THE NEXT MILLENNIUM
Space-Ray infrared heaters heat like the sun by transferring radiant heat energy direct-
ly to the areas to be heated. Radiant energy is absorbed by concrete floors, objects and
people, and re-radiated to warm the surrounding area. This principle is similar to the
sun’s radiant heat energy heating Earth but not the upper atmosphere. This heating
technology creates a comfort zone at floor level, not at the ceiling, and is much more
efficient than conventional forced air heating systems.
30%-50% FUEL SAVINGS
A highly radiant efficient Space-Ray infrared heating system can normally save a
building owner 30% to 50% in annual fuel costs when compared to forced air heating
systems. In fact, some Space-Ray customers report fuel savings as high as 70% with
a payback of less than one year. With a Space-Ray system, your investment payback
accrues not only from reduced energy costs, but from reduced maintenance costs,
too. So when you think industrial heating, think Space-Ray. Call us at 1-800-438-4936
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DIMENSIONS
ETS - BOTTOM VIEW
ETS - END VIEW
ETU - BOTTOM VIEW
ETU - END VIEW
L
L
15”
18”
18”
9”
6”
6”
Control
Box
18”
31”
13”
Draft
Inducer
TOTAL TUBE
OVERALL
LENGTH (FT)
DIMENSION”L”(FT)
MODEL
TOTAL TUBE
OVERALL
MODEL
LENGTH (FT) DIMENSION ”L” (FT)
ETS (40, 50)
15’
20’
17’3”
22’3”
ETU (40, 50, 60, 75)
ETS (40, 50, 60, 75)
20’
30’
12’9”
17’9”
ETU (50, 60, 75, 80, 90,
100, 110, 120, 130)
ETS (40, 50, 60, 75, 80, 90,
100, 110, 120, 130)
30’
40’
50’
32’3”
42’3”
52’3”
ETS (80, 90, 100, 110, 120,
125, 130, 140, 150, 160,175)
ETU (80, 90, 100, 110, 120,
125, 130, 140, 150, 160, 175)
ETU (125, 130, 140, 150,
40’
50’
22’9”
27’9”
ETS (125, 130, 140, 150,
160, 175, 180, 200, 225, 250)
160, 175, 180, 200, 225, 250)
ETU (180, 200, 225, 250)
ETU (180, 200, 225, 250)
ETU (180, 200, 225, 250)
ETS (180, 200, 225, 250)
ETS (180, 200, 225, 250)
ETS (180, 200, 225, 250)
60’
70’
80’
32’9”
37’9”
42’9”
60’
70’
80’
62’3”
72’3”
82’3”
ETS AND ETU
ETS OPTIONS
DRAFT INDUCER
CONTROL BOX
90° ELBOW
CORNER REFLECTOR
Flue Connection:
4” Round for ETS/U (40-75)
6” Round for ETS/U (80-250)
1/ 2
Fresh Air Connection:
4” Round for ETS/U (40-75)
6” Round for ETS/U (80-250)
MINIMUM RECOMMENDED MOUNTING HEIGHTS
HEIGHT AT
45° ANGLE
HEIGHT AT
HORIZONTAL
HEIGHT AT
HORIZONTAL
HEIGHT AT
45° ANGLE
MODEL
MODEL
ETS/U 40
9 feet
10 feet
11 feet
12 feet
12 feet
13 feet
10 feet
11 feet
12 feet
13 feet
13 feet
14 feet
14 feet
15 feet
15 feet
16 feet
18 feet
20 feet
ETS/U 120 & 125
ETS/U 130 & 140
ETS/U 150
13 feet
14 feet
14 feet
15 feet
17 feet
19 feet
ETS/U 50
ETS/U 60
ETS/U 160 & 175
ETS/U 180 & 200
ETS/U 75
ETS/U 80 & 90
ETS/U 100 & 110
ETS/U 225 & 250
This chart is intended as a guide only, as heaters may be mounted at various heights and angles. Since straight tube heaters are always hotter at the burner end than
at the exhaust end, always observe the minimum recommended mounting heights shown above. Use ETU series for spot heating. Please consult your local Space-
Ray Representative for a detailed analysis of your particular infrared heating requirements.
MINIMUM CLEARANCES TO COMBUSTIBLES
(45°)
FRONT
(45°)
REAR
MINIMUM CLEARANCES TO COMBUSTIBLES
MODEL NO.
SIDE
CEILING
BELOW
END
27”
27”
52”
66”
66”
84”
86”
6”
6”
40”
60”
30”
30”
30”
40”
40”
48”
48”
48”
48”
52”
66”
66”
84”
84”
12”
12”
12”
20”
20”
24”
24”
ETS/U (40, 50)
ETS/U (60, 75)
HORIZONTAL
45° ANGLE
6”
84”
ETS/U (80, 90)
6”
88”
(MAXIMUM)
ETS/U 100
6”
101”
106”
132”**
ETS/U (110, 120, 125, 130)
ETS/U (140, 150, 160, 175)
ETS/U (180, 200, 225, 250)
6”
18”
*When used indirect vented, clearances to ceiling from top of exhaust hood must be 12” on ETS/U (40-75), and 18” on
ETS/U (80-250). If optional corner or U-bend reflectors are not used, clearance must be 18”. **Clearance below the heater
is 132” for the first 20 ft. of the emitter tube and reduces to 72” 20 ft. downstream from the control box.
Note: Consult factory if reduced clearances are required.
ETS/ETU SERIES LAYOUTS
ETS/ETU SERIES LAYOUTS
The ETS/ETU series, with more than 100 different configurations, offers optimum flexibility in custom designing an
infrared heating system. The ETS series is available in multiple configurations (straight, L, Z, and expanded U-shape) with
lengths from 15’ to 80’ long. For added versitality, 90° elbows, corner reflectors, and side reflectors are available for close
area mounting near walls, doors, and corners. The ETU series is available in seven different configurations and provides
more uniform radiant heat energy distribution. The ETU series is ideal for high heat loss areas and spot heating.
LEGEND
CONTROL UNIT
DRAFT INDUCER
10FT. BODY SECTION
Z-SHAPE
5 FT. BODY SECTION
STRAIGHT
90° ELBOW
180° U BEND
Z-SHAPE
EXPANDED
U-SHAPE
EXPANDED
U-SHAPE
STRAIGHT
L-SHAPE
L-SHAPE
ETS SERIES
15 FT SYSTEM
20 FT SYSTEM
40 FT SYSTEM
25 FT SYSTEM
45 FT SYSTEM
30 FT SYSTEM
35 FT SYSTEM
50 FT SYSTEM
Only 15 ft. to 50 ft. systems are shown. Please refer to the Installation and Operation Instructions for complete layouts.
ETU SERIES
20 FT SYSTEM
30 FT SYSTEM
40 FT SYSTEM
50 FT SYSTEM
COMBUSTION AIR AND VENTILATION
Combustion air and venting requirements for all gas-fired heating equipment must be provided per the National Fuel Gas Code NFPA54 or the authority having jurisdiction over the
installation. In contaminated atmospheres or high humidity areas, optional outside air for combustion can be supplied. Heaters can be common vented, direct vented, or indirect
vented. Refer to the Installation and Operation Instructions for further information. A vented installation must be vented to the outside of the building with a flue pipe. An Indirect
vented installation requires a minimum ventilation flow of 4 CFM per 1000 Btu/hr of total installed heater capacity on natural gas by either gravity or power ventilation (4.18 CFM per
1000 Btu/hr on propane). For indirect vented applications, building exhaust openings must be located above the level of the heaters and inlet air openings must be located below
the level of the heaters.
FOR YOUR SAFETY
OPERATE SPACE-RAY GAS INFRARED HEATERS WITH PROPER CARE AND OBSERVE ALL SAFETY PRECAUTIONS. Installation and service must be performed by a licensed con-
tractor. The installation must conform to local codes. In the absence of local codes, the installation must conform to the National Fuel Gas Code ANSI Z223.1 (latest edition, also known
as NPFA54) or CAN / CSA-B149 installation codes (latest edition). These codes are available from the National Fire Protection Association, Inc., Batterymarch Park, Quincy, MA 02269
or the Canadian Gas Association, 55 Scarsdale Road, Toronto, Ontario MB3 2R3 Canada.
A Division of Gas-Fired Products, Inc.
P.O. Box 36485 Charlotte, NC 28236 Telephone (Toll Free) 1-800-438-4936 (704) 372-3485 Fax (704) 332-5843
Copyright 2003, GFP INC. 10325M
FORM#S45504
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