ForceRed Series

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What Is ForceRED?

The ForceRED Series is Space-Ray’s next generation infrared tube heater designed to provide the maximum Radiant Output at a fixed emitter tube length, and can provide up to 30% more fuel savings than Standard models. This new series of tube heaters is especially engineered to take the efficiency of infrared tube heaters to the next level of fuel savings.

Space-Ray’s new ForceRED Series was designed by a team of engineers using both computational heat transfer modeling and the advanced European Radiant Output measurement system. The next generation infrared tube heater is here now. ForceRED Series is the future of extra high radiant efficiency infrared tube heaters.

Why Is ForceRED The Next Generation Infrared Tube Heater?

The ForceRED Series pushes radiant energy delivery to the next level by offering 30% more Radiant Output and 30% more fuel efficiency compared to other Standard tube heaters. ForceRED delivers more radiant energy to thefloor level thus helping maintain thermal mass in the floor which offers a quicker recovery when the doors are opened and closed frequently.

For background, infrared tube heaters generate Radiant Output as well as convective output and flue losses. The Radiant Output is the key to producing fuel savings. It is the usable heat that is transferred directly to the floor level. Convective output rises first to the ceiling and will eventually stratify down to the floor level, but there will be wasted heat trapped at the building’s ceiling which is not useful or fuel efficient.

The remaining energy (i.e. products of combustion) is discharged outside the building normally through the vent and is sometimes referred to as the flue loss.

Infrared Comparison

Below is a depiction of how Space-Ray’s new ForceRED Series maximizes Radiant Output while reducing the amount of heat energy lost to both convection and flue losses.

A New Measurement -Setting The Standard With The Infrared Factor (IF)

A new term called the Infrared Factor (IF) is part of a AHRI 1330P standard titled "Performance Rating Standard for Radiant Output of Gas Fired Infrared Heaters". The Infrared factor is a linear scale of values from 7 to 15, where the factor is calculated from the measured Radiant Output of the heater versus the gross energy input in the fuel. The basis for the scale is that the minimum value of 7 represents the equivalent of the minimum permissible Radiant Output required in the ANSI Standard Z83.20 that is needed to be classed as a radiant heater. Infrared Factor values of 9 and 10 represent the average, standard heater values available on the market today.

How Do You Measure Radiant Output?

Until recent years there was no repeatable test methodology to determine the Radiant Output of tube heaters. Two previous major efforts by tube heater manufacturers and nationally recognized testing laboratories resulted in a test methodology with mixed results.

A new, reliable method has recently been developed in Europe which is documented in the European Standard EN416-2. In this standard, the Radiant Output is measured from a distance of 4" (100mm) below the heater to minimize the transmission losses. Measurements are taken with a water cooled thermopile in a grid with points of 4" x 4" (100mm x 100mm) across the width of the heater as well as along the entire length of the heater. The measurements are recorded using a computer data acquisition system. The data points are then integrated to give measurements per square decimeter and a calibration constant is applied to the measured mV values to convert to w/dm^2 . Thanks to the precision of this measurement system, Space-Ray engineers were able to use the results of experimentation with both heater design and heat input to maximize the heat output and get the highest Radiant Output for each model length.

What Is Different About ForceRED?

ForceRED is designed to maximize Radiant Output for a given emitter tube length (15’, 20’, 30’, 40’ etc…) at maximum emitter tube temperatures.

ForceRED is designed for maximize Radiant Output with the use of a unique dual reflector system − individual Asymmetric Reflectors & Outer Shield Reflector.

ForceRED is designed for Maximum Thermal Efficiency through the extensive use of special turbulators at the firing leg as well as exhaust leg.

ForceRED is designed to only be installed horizontally to maximize Radiant Output radiant energy transfer to the floor level (as whenever tube heaters are angle mounted, they increase their convective losses which reduces the tube temperatures, and in turn reduces Radiant Output as much as 30%).

ForceRED is designed to produce lower levels of CO2 based on the lower firing rates needed to heat equivalent sized buildings with a lower Btu/Hr input.

Why Does ForceRED Use Aluminum Reflectors With A Dual Reflector Design?

Aluminum reflectors are widely used by infrared heater manufacturers due to their high reflectivity rating of 0.97*. We asked our Engineers to start with a clean slate and consider other materials when designing the ForceRED Series. They reviewed polished Stainless Steel (430 2BA) material which has a lower reflectivity rating of 0.85*. Results showed that when subjected 3 days of operation, the stainless steel reflectors discolored and the Radiant Output declined by 3.1%. They also explored the use of Aluminized Steel (aluminum silicate hot bonded steel reflectors with a reflectivity of 0.80** and on initial operation they found that the Radiant Output was 6.3% lower than Aluminum reflectors. This solidified our decision to incorporate only aluminum reflectors on the new ForceRED series. Given the decision to utilize aluminum reflectors due to their high reflectivity rating of 0.97, our Engineering determined via Radiant Output tests that an air gap between the dual aluminum reflectors was superior to less reflective materials (e.g. stainless steel or aluminized steel) with a rigid or rolled insulation material sandwiched between the two reflectors. The result was a new, unique dual reflector design utilizing the insulating properties of an air gap in between two highly efficient aluminum reflectors which results in a substantial gain in overall Radiant Output.

*Sopp and Brandt, Reflectivity and Emissivity of Bare and Coated Aluminum, Finishes Division of Alcoa, Research Laboratories, 1975, P10

**Atlas Steel Products, Aluminized Steel Type 1, ASTM463-A. (www.atlassteel.com website article)