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The heat transfer coefficients are used to describe the combined emission/absorption and convective transfer for radiant surfaces. Heat transfer coefficients can be used to determine surface temperatures (t_s);

(flux/htc) + t_r = t_s (heating)
t_r - (flux/htc) = t_s (cooling)

where,

flux load, Btu/Hr ft²
htc = coefficient, Btu/hr ft² °F
t_r = room temp, °F
t_s = required surface temp., °F

Surface temperature limitations are based on comfort and safety.

Floor temperatures shown are for wearing normal footwear. For socks, stocking or bare feet, the surface temperature is a function of the floor conductivity and can vary from 72°F to 82°F for carpets to tile respectively.

Wall and ceiling temperatures are based on radiant asymmetry.

In no case should temperatures exceed material property recommendation such as drywall at 125°F

The flux capacities are used to describe the maximum radiant heating emission and radiant cooling absorption with convective transfer which can be obtained from a surface based on occupant comfort in offices and homes. These heat flux's can be used to establish maximum surface temperatures (t_s);

(flux/htc) + t_r = t_s

where,

flux load, Btu/Hr ft²
htc = coefficient, Btu/hr ft² °F
t_r = room temp, °F
t_s = required surface temp., °F

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