Cold Blocker CB Series

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Wind Blocker Features

  • Indoor or Outdoor Rated. Can be exposed to outdoor elements – rain or snow.
  • Tinted ceramic glass technology provides Wind resistance up to 40 mph wind force.
  • Provides a totally enclosed combustion pattern and maintains consistent output even in windy environments.
  • Horizontal or angle mounting up to 60°.
  • Compact size for easy installation from 6′ to 16′ above floor.
  • Clearances as low as 10” above the heater with an optional shield.
  • Can be suspended from ceiling or angle mounted from column or sidewall with optional adjustable mounting brackets.
  • Factory shipped as a two stage control heater and can be used with optional 3 position switch for ultimate comfort. Operate at first stage (24,000 Btu/hr) during milder days and operate at full power (35,000 Btu/hr) on colder days.
  • Can be operated at full power (35,000Btu/hr) as a single stage heater by a simple factory supplied jumper wire.
  • CSA Design Certified – ANSI Z83.19 & ANSI Z83.26 Standard

Both heaters shown above were installed horizontally – photos were taken looking straight up from floor level.

Installation photographs demonstrate how adverse wind conditions can affect the performance of infrared heaters. On typical competitive models (above left) the flame exits the burner, which can eventually melt the protective grill. The Space-Ray WB Series (above right) features a totally enclosed burner with glass preventing heat rollout during harsh wind conditions.

The Wind Blocker with tinted ceramic glass can operate in winds up to 40 MPH without any adverse wind effects.The glass front totally protects the burner and improves burner performance resulting in higher efficiency.

Models
MODEL SINGLE STAGE BTU/HR INPUT TWO STAGE MIN MOUNTING
HEIGHT
BTU/HR HIGH INPUT BTU/HR LOW INPUT
WB35 35,000 35,000 24,000 7′

* Indicate model number based on Btu/hr input (e.g. 35,000Btu/hr),Control suffix (e.g. Natural Gas two stage input ) . The unit selection would be WB35-N7.

** Minimum recommended heights are intended as a guide only, as heaters may be mounted at various heights and angles. Mount heaters as high as possible. Minimums are shown as a guideline for human comfort and uniform energy distribution for complete building applications. Please consult your Space-Ray Representative for a detailed analysis of your particular heating requirements.

Control Suffix Type of Gas Control Option Description
N7 / L7 Natural / Propane

Two Stage Gas Valve- Modulating Input – High/Low Fire

Heater Sizing & Layouts

Heater Sizing & Layouts-

Radiant heaters work like the sun to emit radiant heat directly to the space to increase the comfort of the patio guests. Suitable applications include patios, porches, outdoor shopping areas and pathways.

The amount of temperature increase in outdoor patio spaces will be dependent on the following factors:

  1. The number of heaters in the space is important to provide good coverage of the area to be heated.
  2. Take care not to mount the heaters too low or too close together this can make people directly below the heaters uncomfortable.
  3. It is recommended to use a suitable windbreak to reduce the effects of direct wind on the patio. If an area is going to be unprotected and is a breezy location then heaters may need to located closer together. Wind breaks must be designed to allow fresh air for ventilation.
  4. Angling the heaters greater than 30 degrees should be avoided unless the mounting height is low, when the heaters are angled more than 30 degrees the radiant intensity is lower and will reduce the amount of heat felt by the guests.
  5. It is recommended to place the heaters in the area of greatest heat loss facing into the patio area.

Learn More on Sizing, Coverage & General Layouts

Specifications
  • Indoor or Outdoor Rated. Can be exposed to outdoor elements – rain or snow.
  • Tinted ceramic glass technology provides Wind resistance up to 40mph wind force.
  • Provides a totally enclosed combustion pattern and maintains consistent output even in windy environments.
  • Horizontal or angle mounting up to 60°.
  • Clearances as low as 10” above the heater with an optional shield.
  • Can be suspended from ceiling or angle mounted from column or sidewall with optional adjustable mounting brackets.
  • Factory shipped as a two-stage control heater and can be used with optional 3 position switch for ultimate comfort. Operate at first stage (24,000 Btu/hr) during milder days and operate at full power (35,000 Btu/hr) on colder days.
  • Can be operated at full power (35,000Btu/hr) as a single stage heater by a simple factory supplied jumper wire.
  • 3-year limited warranty on the burner assembly, and 1-year limited warranty on the controls.
  • CSA Design Certified – ANSI Z83.19 & ANSI Z83.26 Standards.
Dimensions
MODEL INPUT BTU/HR HEIGHT OVERALL DIMENSION SHIPPING WEIGHT Lbs.**
WB 35 35,000 9.6″ 48″ 55
** Hanging weight is 85% of shipping weight

Supply Requirements
GAS TYPE BURNER PRESSURE MINIMUM SUPPLY
PRESSURE
MAXIMUM SUPPLY
PRESSURE
VOLTAGE AMPS IGNITION TYPE
NATURAL 6″W.C. 7″W.C. 14″W.C. 120VAC 0.1 DIRECT SPARK
PROPANE 11″W.C. 11.5″W.C. 14″W.C. 60HZ
Outdoor Clearance Information

The stated clearance to combustibles represents a surface temperature of 117º F (65º C) above room temperature. Building materials with a low heat tolerance (such as plastics, vinyl siding, canvas, tri-ply, etc.) may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent materials are protected from degradation.
See below the possible surface temperature at the clearance to combustible distance for different ambient temperatures within the heated space.

AMBIENT TEMPERATURE 70°F (21.1°C) 65°F (18.3°C) 60°F (15.5°C)
SURFACE TEMPERATURE 187°F (86.1°C) 182°F (83.3°C) 177°F (80.6°C)

This heater is approved for both INDOOR and OUTDOOR installation. Both installation options have different clearances to combustibles as described below. These must be observed.

INDOOR clearances to combustibles are defined as a surface temperature of 90°F above ambient temperature.

OUTDOOR clearances to combustibles are defined as a surface temperature of 117°F above ambient temperature.

OUTDOOR Spaces are defined as a shelter no more inclusive than:

a) With walls on all sides, but with no overhead cover

b) Within a partial enclosure which includes an overhead cover and no more than two side walls. These side walls may be parallel, as in a breezeway, or at right angles to each other

c) Within a partial enclosure which includes an overhead cover and three side walls, as long as 30 percent or more of the horizontal periphery of the enclosure is permanently open.

Minimum clearances shall be measured from the outer surfaces of the heater or heat shield if installed, as shown in the diagrams for the different installation positions.

Fire sprinkler heads must be located at an appropriate distance from the heater. This distance may exceed the published clearance to combustibles. Certain applications will require the use of high-temperature sprinkler heads or relocation of the heaters.

Sprinkler systems containing propylene glycol or other flammable substances are not to be used in conjunction with this heater without careful consideration for and avoidance of potential fire or explosion hazards. For further information consult the authority having jurisdiction. Always observe applicable state and local codes.

Always maintain minimum clearances and post signs where needed. This heater is supplied with a wall mounted sign shown below. It is the installers responsibility to ensure that the sign is completed with the correct clearance to combustible distances for the installation and that the sign is posted in a location where it is easily accessed.

Indoor Clearance Information

 The stated clearance to combustibles represents a surface temperature of 117º F (65º C) above room temperature. Building materials with a low heat tolerance (such as plastics, vinyl siding, canvas, tri-ply, etc.) may be subject to degradation at lower temperatures. It is the installer’s responsibility to assure that adjacent materials are protected from degradation.
See below the possible surface temperature at the clearance to combustible distance for different ambient temperatures within the heated space.

AMBIENT TEMPERATURE 70°F (21.1°C) 65°F (18.3°C) 60°F (15.5°C)
SURFACE TEMPERATURE 160°F (71.1°C) 155°F (68.3°C) 150°F (65.6°C)
Accessories
Wall / Ceiling Telescopic Mounting Bracket (44560350)

Mounting Bracket Kit 15″-22″ overhead space (check clearances to combustibles space above the heater before ordering) Details on Deflector Kit (PDF)

Ceiling Telescopic Mounting Bracket Kit (44560351)

Ceiling Telescopic Mounting Bracket Kit- 22″-30″ overhead space (check clearances to combustibles space above the heater before ordering)

Wall / Ceiling Telescopic (44560352)

Wall / Ceiling Telescopic Mounting Bracket Kit- 15″-30″ overhead space (check clearances to combustibles space above the heater before ordering) includes both the 15-22” and 22-30” extension legs.

Ceiling Mount Bracket Kit (44560353)

Ceiling Mount Bracket Kit- 10″ fixed installation for minimum overhead clearance. This bracket is only for horizontal mounting with the heat shield.

Heat Shield Kit (44566300)

Heat Shield Kit – Reduced clearances to combustible option when installed. Mounting angles are restricted to 0, 15, 30, 45 and 60°.

Column Mounting Arm Kit (44560590)

Column Mounting Arm Kit – suitable for columns 8” and wider.

3 ” Pole Mounting Bracket Kit (44560600)
4″ Pole Mounting Bracket Kit (44560609)
Chain Kit, 12 ft. chain w/ 8 hooks (41690120)
Gas Connector (30302241)

Gas Connector – Black Powder Coated Paint to match the heater. 1/2″OD -24″ Long with 1/2MIP X 1/2 FIP Connection.

Gas Connection Kit- 1/2″ (44604500)

Gas Connection Kit- 1/2″-Includes Gas Connector, Manual Ball Valve, Sediment Trap (Tee, Cap, Nipple), Thread Sealing Compound.

Gas Regulator (03307260)

Gas regulator 2psig to 11” w.c. ½” NPT inlet and outlet.

3 Position Switch Kit (40147010)

3 Position Switch Kit, (High/Low/Off) for manual heater control (N7/L7).

Two Stage Relay Kit (44195000)

Two Stage Relay Kit (one per heater required) for controlling multiple heaters w/a single 24V Two Stage thermostat.

Frequently Asked Questions

Certification

Do Space-Ray infrared radiant gas heaters have UL certification?

Because our infrared gas heaters are gas appliances, it is not necessary that they be listed by UL (a nationally recognized testing laboratory – NRTL); however, all of the electrical component parts are UL listed (e.g., the draft inducer motors, which are equipped with CSA and UL approved thermal protectors). Our heaters are certified by C.S.A. (a nationally recognized testing laboratory – NRTL) and carry the C.S.A. seal. All heaters are tested and meet or exceed all safety requirements set forth in American National Standard Z83.20 for infrared heaters.

Do Space-Ray infrared radiant gas heaters have FM certification?

Generally, Factory Mutual certification (a nationally recognized testing laboratory – NRTL) is applicable to products that cannot be certified at the manufacturer’s facility according to American National Standard and, therefore, need to be certified at the installation site. Our heaters are certified by C.S.A.(a nationally recognized testing laboratory – NRTL) and carry the CSA seal. All heaters are tested and meet or exceed all safety requirements set forth in American National Standard Z83.20. Factory Mutual recognizes C.S.A. certification.

Infrared

Is this the heater that heats people but not the air?

This is inaccurate for complete building heating. Infrared heaters heat people, the floor slab and machinery first, but since infrared uses all methods of heat transfer (radiation, re-radiation, conduction and convection), the air is heated secondarily as it passes over the warm concrete. Therefore, the heaters can be controlled by air temperature sensing thermostats.

Space-Ray

How long has Space-Ray been manufacturing infrared radiant gas heaters?

Space-Ray infrared gas heaters are manufactured by Gas-Fired Products, Inc., which was founded in 1949 and has been manufacturing infrared heaters since 1958. Our heaters are certified by C.S.A (a nationally recognized testing laboratory – NRTL) and carry the CSA seal. All heaters are tested and meet or exceed all safety requirements set forth in American National Standard Z83.20.

Technical

Why is a Space-Ray infrared radiant gas heater more efficient than unit heaters?

The major difference between a gas-fired infrared heating system and a forced hot air heating system is the method used to create a comfortable temperature. Infrared heats the floor slab, the machinery and the people first and then the air by using all three methods of heat transfer: radiation, conduction and convection. The storage of the heat in the slab floor creates a low temperature emitter and a faster recovery time when large overhead doors are opened and closed.

With a forced air system, the hot air rises to the ceiling and stratifies, gradually working its way down to thermostat level so that the floor slab never becomes warm enough to be comfortable. It literally acts as a heat sink, draining heat from the air and from personnel standing on the floor. The ceiling area of a high bay building using a forced air system can be easily 30° to 40° warmer than the floor area.

In the same type building heated with an infrared system, the temperature is much more uniform and the loft or roof area commonly will be at a slightly lower temperature than the floor level . . . a good condition for minimizing heat loss. Comfort can be maintained with a lower air temperature that will reduce infiltration and heat loss through the walls and roof.

In addition, instead of adding Btu/hr capacity to a computed building heat loss based on the thermal efficiency of a forced air system, the capacity is normally reduced by as much as 20%, based on the mounting height of the infrared system.

An added plus is that an infrared system has minimal power requirements, needing electricity only for burner ignition, the gas valve and the draft inducer (where applicable).

It is, therefore, easy to see that infrared commonly will save 30% to 50% in energy costs over unit heaters, frequently even more.

What is the efficiency?

First of all, there is a distinct difference between combustion efficiency and thermal efficiency. Combustion efficiency is determined by the percentage of fuel converted to usable energy given sufficient combustion air. In our tube heaters, we provide sufficient excess air to achieve complete combustion; therefore, 99.9% of all combustible constituents of fuel is converted to carbon dioxide and/or water vapor, and nitrogen (excluding trace compounds).

Thermal efficiency directly measures the flue losses based on CO2% in flue gas and flue gas temperature. For example,the LTU Series’ CO2% is 7-8.9% and the flue temperatures are below 350°F, which complies with the American National Standard. Given these two facts, the thermal efficiency of our tube heaters is 75 to 83%, depending on the model.

We feel that while thermal efficiency is a good measure for forced air heating systems, it is not the best measure for a radiant heating system. We think the best measure for a radiant system is its overall radiant efficiency. The amount of radiation received on the floor, not convective heat transfer, will determine whether it is a good radiant heater or not. The radiant efficiency of any gas infrared heater can be calculated with the following equation:

Radiant Efficiency = Radiant Output/Heat Input

Radiant Output is determined by: R = SEA (T4 – Ta4)
where

S = Stefan-Boltzmann Constant
E = Emissivity of Radiating Surface
A = Surface Area
T = Emitter Surface Temperature
Ta = Ambient Temperature

Our aluminized steel emitter tubes are calorized and the emissivity of these emitter tube is around 0.80 – 0.83.The emitter tube temperatures average 750°F to 800°F.With these given values, the calculated radiant coefficient (input/radiant output) of our tube heaters is around 65.2%.

How do you size infrared when replacing existing forced air unit heaters?

An infrared heating system is always sized at a lower input capacity when compared to forced air(convection) heating.This is due to different modes of heat transfer (radiation vs. convection), thermal mass and minimal stratification between ceiling and floor temperatures. For retrofit purposes, provided the unit heaters are maintaining the desired inside design temperature at ASHRAE design conditions,the following reduction can be utilized when recommending an infrared heating system.

Type
Thermal Efficiency
% Reduction in System Sizing
High Efficiency Unit Heater
80%
32%
Convectional Unit Heater
62%
48%

Assuming that the ASHRAE heat loss for a building is 100,000 Btu/hr, then the heater selection for this building would be as follows:


Infrared Heater
Unit Heater
Building Heat Loss:
100,000 Btu/hr
100,000 Btu/hr
Infrared Compensation Factor1:
(for radiant heating)
0.85

Thermal Efficiency2:
(for convection heating)

80%
Heater Input Required:
85,000 Btu/hr
(100,000 x 0.85)
125,000 Btu/hr
(100,000 / 0.80)
  1. Infrared heat loss compensation factor based on 26’AFF mounting height (see section C).
  2. High Efficiency Unit Heater for comparison purposes.
How many square feet does a Space-Ray infrared radiant gas heater cover?

The heater model and capacity are not necessarily a function of the square footage of the area needing to be heated. The model generally is chosen after the Btu/hr heat loss for the building or spot area to be heated has been determined, which is a function of not only the size of the area, but geographic location, building materials, building usage and other factors. Area coverage could be as little as 500 sq. ft. or as much as 10,000 sq. ft.

Are there applications for which Space-Ray infrared radiant gas heaters are NOT suitable?

You may not use gas-fired infrared heaters inside paint booths or in buildings where explosion-proof lights are required. Although infrared is not ideal as an air curtain, it is very effective in spot-heating work areas inside of doorways, in dock areas and on outdoor docks.

How low can I hang my Space-Ray infrared radiant gas heaters?

Space-Ray infrared heaters have been mounted as low as 8′ above the finished floor (in home garages and workshops) to as high as 70′ (in high bay aircraft hangars). The mounting height depends on the Btu/hr capacity and model of the heater. Please refer to the heater’s specification sheet for minimum recommended mounting height and required clearances to combustible materials.

What extra items are needed for installation?

Depending on your particular application, you will want to consider the following six accessories for all series of Space-Ray infrared tube heaters:

1.Thermostat
2. Manual Cutoff Valve
3. Flexible Gas Connector
4. Second Stage Regulator if supply pressure is over 14″ W.C.
5. Chain Kit with S hooks for hanging heater

How are Space-Ray infrared radiant gas heaters controlled?

Primarily, the heater is controlled by a line voltage thermostat. Alternatively, you may use a 24-volt thermostat with a relay kit or an on/off switch.

Other

What are the emission levels of Space-Ray infrared radiant gas heaters?

Air-free CO emission levels are 0.0010 – 0.0020%, or 20 to 40 times lower than the maximum acceptable level as indicated in American National Standard Z83.20. Space-Ray utilizes burners that are made of heavy duty cast iron and are designed to enhance maximum primary and secondary air flow around the venturi assembly. The high velocity of the flame and the delayed flame-quench period minimize the products of combustion which include aldehyde, formic acid, nitrous oxide, and carbon monoxide.

California Proposition 65 Warning

WARNING: This equipment, its related accessories and by-products of operation contain chemicals known to the State of California to cause cancer, birth defects and other reproductive harm.