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Chapter 5.1.3 - Radiant Panel Systems Evaluation
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Chapter 5.1.3 - Radiant Panel Systems Evaluation
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From Radiant Heating and Cooling Handbook
There are many advantages unique to radiant panel systems. The authors have
included those recognized in ASHRAE Handbook Fundamentals, research, and manufacturers’
literature. The importance of each feature will vary with the application
and geographic location. However, a full understanding of the impact of radiant panel
features on design comparison is essential to a robust comprehensive evaluation.
Radiant panel evaluation features include the following: - Better comfort levels because radiant loads are satisfied directly and air motion is
at normal ventilation levels. - Energy savings due to reduced air infiltration and exfiltration, lower or nonexistent
heat transmission losses compared with ducted systems, and lower heat loss
due to dry-bulb air temperatures that are no higher than the level required for
occupant thermal comfort. - Low or minimal maintenance is required for radiant panels.
- Reduced air filtration as makeup air is required only for ventilation and not for
deliveries of heat as forced-air systems require. - One hundred percent usable floor space and simplified wall, floor, and structural
systems because there is no space-conditioning equipment at the outside walls. - Cleanliness due to elimination of mechanical equipment in the conditioned floor
space satisfies certain legal requirements. - Window treatment freedom as installation is not restricted by space-conditioning
equipment. - Simultaneous hydronic heating and cooling without central zoning or seasonal
changeover when a four-pipe system is used. - Common central air system can serve both interior and perimeter zones.
- Space partitioning and use flexibility with modular radiant panel systems.
- Reduced air quantities for 100 percent outside air systems mean smaller penalties
in terms of refrigeration load. - Draft-free environment due to a minimum supply of air quantities with radiant
heating and cooling. - Little or no noise compared with induction and fan-coil units.
- Peak load reduction due to mass thermal energy storage in the panel structure,
exposed walls, partitions, and furnishings. - Hybrid system problem solving when coupled with other conditioning systems for
heat loss (gain) compensation for cold or hot floors, walls, windows, skylights, fireplaces,
or other cold surfaces.
Radiant panel disadvantages include the following: - Slow response is a characteristic of high-mass systems that can be ameliorated by
careful selection and installation of heating elements and controls. - Nonuniform surface temperatures due to improper element sizing, piping installation
spacing, or insufficient heat capacity. - Options may be restricted for building materials selection, floor coverings, furnishings
location, and heater proximity. - Renovation, redesign, and furnishings options and costs may be impacted.
Radiant heat panels provide natural, direct source-to-object heating that does
not require a heat transfer medium. A radiant panel is noiseless, odorless, and generally
maintenance-free. Panel design and planar location establish basic heat transfer
characteristics that can be managed by thermostats, and fluid controls in the case
of hydronic systems.
There are many advantages unique to radiant panel systems. The authors have
included those recognized in ASHRAE Handbook Fundamentals, research, and manufacturers’
literature. The importance of each feature will vary with the application
and geographic location. However, a full understanding of the impact of radiant panel
features on design comparison is essential to a robust comprehensive evaluation.
Radiant panel evaluation features include the following: - Better comfort levels because radiant loads are satisfied directly and air motion is
at normal ventilation levels. - Energy savings due to reduced air infiltration and exfiltration, lower or nonexistent
heat transmission losses compared with ducted systems, and lower heat loss
due to dry-bulb air temperatures that are no higher than the level required for
occupant thermal comfort. - Low or minimal maintenance is required for radiant panels.
- Reduced air filtration as makeup air is required only for ventilation and not for
deliveries of heat as forced-air systems require. - One hundred percent usable floor space and simplified wall, floor, and structural
systems because...
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© 2009 McGraw-Hill Companies, Inc. (The)
Products & Services
Thermostats and thermal switches are electro-mechanical on/off switches that are activated by temperature changes. They are typically used to control heating and cooling systems.
This is a general search form for all types of industrial heaters, devices which are available in a variety of sizes, shapes, and heating configurations.
Temperature controllers accept inputs from temperature sensors or thermometers, and then output a control signal to keep the temperature at the desired level.
Radiant flat panel heaters are used to heat objects via radiant heat transfer.
Radiant heater elements are used with radiant flat panel and radiant reflective heaters.
Product Announcements
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Reznor® High-Intensity Infrared Models RIHN are designed to provide personal comfort heating with reduced energy cost. Units are available in sizes from 30,000 through 160,000 BTUH gas input for use...
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Ceramic panel heaters are used when heating large, massive or reflective products. Panel heaters are also a great option when space is limited. Watt densities of 25 watts per square inch can really...
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Chromalox announces the release of a new selection of comfort radiant heaters suitable for outdoor comfort heating applications as well as for ice and snow melting. Units are available in a variety of...
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Ceramic Generators, Coil-O-Rod or COR Generators, Ceramic Panel Heaters, and more.
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Looking for a way to control the climate effectively in multiple rooms in your building? No matter what your cooling and heating needs may be, Mr. Slim systems are the perfect way to transform your...
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Wellman Furnaces is a source for all types of electric heating elements, devices and systems including those listed below. In particular, we can supply you with replacements for electric heaters and...
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The Chromalox ChromaStar™ infra-red comfort heaters are designed to provide a rugged source of heat for use in areas where dependence on air movement is impractical. It can be your movable...
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FLIR cameras give consumers the information needed to make good decisions about home improvements while giving home contractors the tools to offer quality services and solutions.
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Maximum Temperature: 1000°F / 538°C
Radiant Heat Bell Ovens are designed to provide economical radiant heat. The outer casing is heavy gauge reinforced steel construction insulated with mineral wool...
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Maximum Temperature: 650°F / 343°C
TRENT Paraplast Melters are similar in design to the KA Series Kettles, but have been adapted to enable melting Paraplast and other low melting point compounds. The...
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Topics of Interest
Electricity, oil, gas, propane, wood, and alternative energy sources have all been used
successfully as the source of energy for radiant heating. Deciding which energy
source to choose requires...
( Read More)
Maximizing radiant output is the goal of radiant panel design. Minimizing backloss
and edge loss is an important first step toward maximizing frontal heat output. Panel
planar location and airflow...
( Read More)
Each form of electric radiant panel has found application in a wide variety of buildings.
Some applications are more common for each form of electric radiant panel.
For example, discrete-metal or...
( Read More)
Radiant hydronic wall panels encompass concealed conduit systems and surfacemounted
panels.The same design features addressed with ceiling and floor panels in
order to ensure the highest frontal...
( Read More)
The insulation and routing of heat transfer plumbing lines or circuit tails is important
for the overall performance and energy efficiency of the system. ASHRAE
SPC-152P, Method of Test for...
( Read More)
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