Mor Electric Heating Logo

Questions? 1-800-442-2581
8:00am-5:00pm M-F (Eastern Time)

Shopping cartShopping Cart

Our secure online ordering website:
Our other websites: and

Home | Products | Accessories | Ordering | Contact Us | Search

Salamander Ceramic Infrared Emitters Technical Manual Page 6

En Espaņol

Infrared Heating Basics

        This section of the technical manual is a summary of the physics involved in all infrared heating systems. The information can be used as an aid in calculating system power requirements as well as determining the feasibility of a given infrared heating application.

Infrared Energy:

        When infrared energy strikes an object it may be absorbed, transmitted, or reflected from the surface. The sum of the amount of energy absorbed, transmitted, and reflected must equal 100% of the total incident energy. An object is called a "blackbody" if it absorbs (or emits) 100% of incident infrared radiation.

1 = ρ + α + t

    ρ = reflectivity
    α = absorptivity
    t = transmissivity

Example: Infrared energy strikes an object that is 30% reflective, and 20% transparent, how much infrared energy is absorbed by the object?

1 = .30 + α + .20
α = 1 - .30 -.20 = .50 (or 50% )

        The term "blackbody radiation" was derived from an experiment in cavity radiation. A small hole was drilled into an object and light was focused into the hole. The hole (cavity) appeared to be black. Light that entered the cavity is trapped and absorbed into the object allowing no light to escape. Radiant energy emitted from a "blackbody" source is dependent only on the temperature of the cavity walls and is not at all dependent on any other characteristic of the source such as color.


        A true "blackbody" source for industrial applications has not yet been developed. However, various radiant heating elements are available with a wide range of radiant efficiencies. The efficiency of a radiant heater is given by its emissivity value. Emissivity is defined as the ratio of the radiant energy emitted by an object at a given temperature and the radiant energy emitted by a "blackbody" at the same temperature.

e =     _____________

    e = emissivity of source
    Ws = Total radiant energy emitted from a source at temperature T1
    Wbb = Total radiant energy emitted from a blackbody at temperature T1

Page 5    Page 7
Technical Manual Table of Contents
Technical Manual in Acrobat .pdf format

Home ] Up ]

We are a distributor of infrared heaters. Always consult manufacturers installation instructions for proper installation of the products or systems shown on this website. © Copyright 1999-2019 Mor Electric Heating Assoc., Inc.

5880 Alpine Ave. NW - Comstock Park, MI 49321  USA
Tel 616-784-1121 - 800-442-2581 - Fax 616-784-7775

   follow our blog   Find us on FaceBook   watch our youtube channel   Follow us on Twitter