Cold Weather Products Catalog

Technical

Technical Information Watt Density for Typical Applications vs. TemperatureRise

Density Watts / Square Foot Desired Comfort Temperature Rise ˚F

Application

Condition

5°F

10°F

15°F

20°F

25°F

I ndoor Supplementry Heat Indoor Personnel Comfort Indoor Personnel Comfort Indoor Personnel Comfort Indoor Personnel Comfort

15 to 30 Watts / Square Foot

No Drafts/No Cold Walls Average Conditions Drafty Are/Cold Walls

5 to 6 11 to 13 17 to 20 22 to 26 28 to 33 7 to 9 15 to 18 23 to 28 30 to 36 39 to 47 10 to 12 20 to 24 30 to 36 40 to 48 50 to 60

Large Mall Type Buildings Removal and Control Protected Area W/Wind Shield

40 TO 60 WATTS / SQUARE FOOT 15 TO 30 WATTS / SQUARE FOOT 80 TO 120 WATTS / SQUARE FOOT

Indoor Moisture

Outdoor Loading Dock Outdoor Marquee Heating

Snow & Ice Melting Use Table B 20 ft. Mounting Hgt.

TECHNICAL

Outdoor Personnel Comfort

Not Open To Sky

10 to 12 20 to 24 30 to 36 40 to 48 50 to 60

Protected Area No Wind Radiant Fixtures for spot heating of individuals should be mounted 10 to 12 feet from the floor with coverage from at least two (2) sides and directed at the individuals waist and never directly overhead. If fixture must be mounted over 12' from the floor, add 25% to the indicated watt density up to a maximum of 15'. SnowControl DesignGuidelines

Outside Design Temperature (˚F)

Annual Snowfall

Exposed* w/ sq.ft.

Semi-Protected*

Protected*

Inches

w/ sq.ft.

w/ sq.ft.

-20 to -60 -20 to -60 -20 to -60 -20 to -60 -20 to -60 -10 to -19 -10 to -19 -10 to -19 -10 to -19 -10 to -19 0 to -9 0 to -9 0 to -9 0 to -9 0 to -9 19 to 1 19 to 1 19 to 1 19 to 1 19 to 1 40 to 18 40 to 18 40 to 18 40 to 18 40 to 18

80 to 115 50 to 79 20 to 49 10 to 19 80 to 115 50 to 79 20 to 49 10 to 19 80 to 115 50 to 79 20 to 49 10 to 19 80 to 115 50 to79 20 to 49 10 to 19 80 to 115 50 to 79 20 to 49 10 to 19 0 to 9 0 to 9 0 to 9 0 to 9

200 175 125 110 100 175 125 110 100 100 125 110 100 100 100 110 100 100 100 100 100 100 100 100 100

185 160 110 100 160 110 100 90

160 145 100

90 85

145 100

90 85 75 90 85 75 65 90 85 75 65 60 60 60 60 60 60

90 80

110 100

100

90 80 70 90 80 70 70 70 70 70 70 70

100

0 to 9

Heater Selection Guidelines 1. Always use clear quartz lamps as the correct element selection 2. Use CRDS or CRTS stainless steel enclosures for outdoor locations 3. For best results use 30˚ symmetric units. 60˚ symmetric or assymetric enclosures are generally satisfactory in semi-protected or shielded areas. Never use 90˚ reflectors.

* Exposed = Totally open area * Semi-Protected = One side closed plus roof or overhang * Protected = Three sides plus roof or overhang

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