Space Ray Products Case Studies
Infrared Radiant Gas Heaters Save Levi Strauss Warehouse a Quarter Million Dollars
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When Levi Strauss & Co. decided to replace 20 forced air unit heaters five years ago in part of its 360,000 sq. ft Florence, KY warehouse and distribution center, it looked at a variety of options including forced air units and several lines of gas-fired radiant tube heaters.
The 192,000 sq. ft active warehouse has almost four miles of conveyor which runs from an adjoining warehouse down 40 ft tall by 360 ft. long aisles. "We were barely maintaining a temperature of 60 degrees," noted Gary Cooper, maintenance manager of the company's Florence distribution center. "Employees had to wear sweaters and jackets to keep warm, a real problem during sub-zero winter temperatures. Complaints were frequent, morale was low and productivity was affected." |
Levi Strauss and Co. Florence, KY Warehouse and Distribution Centre. |
After a search including a heat analysis process with five major heating unit manufacturers, Cooper and Levi Strauss decided that heating and comfort needs could best be met by replacing the unit heaters with 28 RSTP17 infrared gas-fired radiant tube heaters from the Space-Ray Division of Gas-Fired Products, Inc., Charlotte, NC. The heaters were placed five ft down from the 24 ft high ceiling replacing 20 forced air units.
Since installing the system, employee complaints have stopped and Levi Strauss has saved over a quarter million dollars in gas and electricity costs alone during five heating seasons.
"I stuck out my neck going with Space-Ray's radiant heat technology," Cooper recalled. "The technology was relatively unknown to our corporate management who seemed to be more comfortable at that time with the forced air heating units. That's all changed now. If I propose adding gas-fired radiant heaters to any part of my facility now, it is much easier to justify."
The units operated so efficiently and cost-effectively that additional forced air units were replaced in the facility's shipping and receiving area and in the shipping area of an adjoining 116,000 sq. ft reserve warehouse that is similar in structure to the active warehouse. These units also replaced forced air units.
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The Space Ray RSTP Series Infrared Radiant Gas Heater |
"These heaters will probably save us a half million dollars by 1992 in heating and electricity costs depending on the severity of the winter," Cooper said. "If building usage changes, we can relocate the heaters. They are among the most reliable and flexible I have seen. We are obviously extremely pleased." "The forced air units were not efficient at all," Cooper noted. "Employees were cold and we couldn't adjust the units or move them for maximum comfort. They were stationary and totally non-flexible. Also, instead of wearing sweaters and jackets, as with the former units, our employees are now wearing short sleeve shirts, even in the winter," Cooper noted. "I don't have any more employee complaints, morale is up and productivity has increased. " |
For optimum savings and efficiency, the tube heaters are controlled by a Honeywell Energy Management System from Friday at midnight to 4 A.M. Monday, but temperatures are never allowed to fall below 55° F.
"We turn the system on Monday at 4 A.M. so that the temperature reaches 70 degrees by the time the first shift arrives at 6 A.M.," noted Cooper. "During the week, we turn the system on at 5 A.M."
According to Cooper, in the five years of operation in the 192,000 sq. ft building, the infrared gas-fired radiant tube heaters have never had a maintenance problem. "I negotiated a spare parts package, but haven't needed to use it," Cooper said. "Performance has been superior. The only maintenance required was dusting the units each year."
-Infrared Radiant Gas Heating Case Studies: Major Clothing Manufacturer Warehouse (www.spaceray.com/1_heating_levi-distribution-center.php)
Hickory Hams Restaurant Increases Outdoor Seating Capacity and Profitability
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GASTONIA, NC -- Just as restaurants in Arizona use misters on their patios to cool their customers during the hottest months of the year, two unitized, low-intensity gas-fired infrared tube heaters from Space-Ray of Charlotte, NC, are now helping a Hickory Hams restaurant in Gastonia, NC increase its seating capacity by 40 percent during cooler months by creating a warm, comfortable atmosphere for patrons to enjoy their meals on the restaurant's patio. Seating capacity at the restaurant has increased from 75 to 111 during cooler weather, allowing on-time seating with minimum waiting. The two LTU90 infrared tube heaters, each with a 90,000 Btu/hr capacity, are mounted horizontally and end-to-end above the outside eating area in view of the customers. |
Hickory Hams Resturant, Gastonia, NC |
The heaters are normally used during the cooler months from October to March and can be manually adjusted to the desired temperature which averages 68° Fahrenheit.
Unlike other open-surface combustion heating systems available for patio applications, Space-Ray's LTU series heaters are not affected by outdoor environmental conditions. Since the flame is totally enclosed in the combustion chamber, strong gusts of wind do not affect the operation of the heater.
Marion H. Davis, Jr., president of Hickory Hams, said he decided to purchase the Space-Ray heaters for his patio to better serve his customers and increase business. He said that before the heaters were installed, the restaurant's patio was completely useless when it was cold outside. Davis also pointed out that on several occasions he couldn't accommodate all the people who wanted to dine at his restaurant.
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"Our sales potential was really affected during cooler months because our outside eating area seats 36 people. Now when it's cool outside and the heaters are on, often times we fill up the patio before the inside area which seats 75," he said. "Customers are amazed at how warm they are under the heaters when it's 30° Fahrenheit outside." Another advantage to having the LTU90 tube heaters on the patio is the fact that since they are placed near the windows of the restaurant, infrared heat is transmitted through the windows which helps heat that side of the eating area. "In the cooler months I don't even have to run the heat on that side of the building because the Space-Ray heaters do the job from the outside," Davis noted. "That reduces my electric bill and produces a more uniform heat throughout the restaurant. I have definitely already gotten a return on my investment. We are also constantly getting compliments from our customers about the comfort of the patio eating area during cool weather," he added "Hickory Ham's customers are amazed at how toasty they are outside when it's cold," noted Bob Genisol, Space-Ray's Vice President of Sales and Marketing. "They also comment on how quiet the heaters are when they're on. They help create a very unique and enjoyable eating experience. |
-Hickory Hams Restaurant Increases Outdoor Seating Capacity and Profitability (www.spaceray.com/1_heating_outdoor-restaurant.php)
Aircraft Repair Facility Saves Up to $800,000 Annually
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HAGERSTOWN, Maryland - Tom Allgyer, President of Topflight Airpark, admitted that upgrading the heating system in the former Fairchild Industries aircraft maintenance and manufacturing plant to infrared heating was an excellent choice. Since deciding to replace three large oil-fired boilers with a total of 259 infrared heaters from the Space-Ray Division of Gas-Fired Products, Inc., Charlotte, NC, Topflight has obtained substantial fuel savings and a return investment in well under a year. Records at the plant indicate that heating costs with the old boiler system ranged between $700,000 and $1,000,000 a year, not including the cost of steam used in the production process. "With the Space-Ray heaters, energy costs have been ranging between $135,000 to $200,000 a year, depending on the severity of the winter," Allgyer said. "Return on investment was achieved well within the first year and heating comfort is much more uniform. The result is a more comfortable and productive working environment." |
An interior view of the main 450 by 800 foot long aircraft hangar of Topflight Airpark, Utilizing Space-Ray's perimeter heating design, 60% of the tube heaters were mounted on the on the perimeter about 35 feet above the floor, with the remaining 40% mounted about 60 feet above the floor next to the catwalks. |
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This conversion equates to energy savings of $565,000 to $800,000 a year and reduction in annual fuel consumption by over 70%. |
Conversion to Space-Ray Heaters For Topflight, Space-Ray specified a total of 209 RSTP17 gas-fired infrared tube heaters, each with a 175,000 BTU/hr capacity, 40 LTU75 unitized low intensity infrared tube heaters, each with a 75,000 BTU/hr capacity, and four LTU60 unitized low intensity infrared tube heaters each with 60,000 BTU/hr capacity. The capacity of the total system is 40,265,000 BTU/hr. Because natural gas is directly available from the nearby pipeline, this fuel source was used for added economy. |
-Aircraft Repair Facility Saves Up to $800,000 Annually (www.spaceray.com/1_heating_aircraft-repair-facility.php)







