Schwank IEP-1520 - Manual (Page 7)

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IM110526
RD: JUNE 2011
RL; 1A
BA
InfraSave IEP-1520 Manual
3. PROJECT DESIGN CONSIDERATIONS & GUIDELINES:
NOTE: Also refer to Section 4. Installation, and Table 2 and Figure 2 regarding the
Minimum Required Clearances.
The size and quantity of heaters (amount of heat input) required over an area to provide com-
fort is affected by the following factors:
 General:
 Amount of air movement in the area: “wind chill” requires additional heat input
 Provide wind breaks wherever possible
 ‘Spot heating’ comfort is most effective if people are heated from at least two sides
 Available mounting height for heaters at the project site
 Indoor application:
 ‘Space heat’ the entire structure
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(accurate heat loss calculation required), or
 ‘Spot heat’ only part of a cold indoor area
 The activity level of the people: seated at rest, hard physical labor, etc.
 Outdoor application: Any area heated outdoors is ‘Spot heat’
 NOTE: Model IEP 1520 is for INDOOR USE ONLY
 Ensure that the heater model is suitable and approved for outdoor use
 Desired temperature rise:
 What is the coldest ambient air temperature that the design must consider?
 Then what comfort temperature rise is desired? (Indoor to 65°?) (Outdoor to …?)
 Calculate the required input to get the desired average temperature rise:
 Input = Site Length x Site Width x Temperature Rise x Heat Density per Degree
 Example: (use a heater approved for Outdoor use for outdoor applications)
 Outdoor Patio: 30 ft long by 10 feet wide
 Desired temperature rise: 20°F (average over the area)
 30 x 10 x 20 x 2 = 12,000 Watts total input required
 Compare the values of the available mounting height and area dimensions at the
project site to the recommended mounting heights, length and width of coverage
area, and typical average heat distribution in Figure 1 & Table 1 (next page)
 Layout:
 Space the heaters uniformly around the perimeter (and if required, in the center
or throughout the area) to provide sufficient heat density to accomplish the de-
sired temperature rise or spot heat only specific locations within the area
 Provide heat from at least two sides wherever possible
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Contact Schwank Design Services for assistance at [email protected].
Heat Density
per Degree F
w/(ft
2
)/F°
Heat Density
per Degree C
w/(m
2
)/C°
Outdoor Heating 2 40 Up to 10 mph wind
Indoor Spot Heat 0.75 14 Protected area - low air movement
Input Required per Area per Degree Comfort Temperature Rise