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Section 4. Heater Selection
Determine which heater best fits your application needs. In addition to electrical considerations, you must know your
cabinet size and the range of heaters which fit that cabinet.
4.1 Air Handler Model Number Matrix
Step 1 - Measure your cabinet and use the Air Handler
Model Number Matrix to determine your cabinet size.
Brand
Product Type
Air Handler
Convertibility
Multi-poise 4-way
Product Tier
Multi-speed
Major Design
Modifications
No Descriptor
Air Handler / Coil
17.5 x 21.5
Size (Footprint)
21.0 x 21.5
23.5 x 21.5
AH Coil - 1,000
Cooling Size:
BTU's (18, 24, 30,
Air Handler
36, 42, 48, 60)
Electric Heat - kW
Electric Heat Input
(05, 08, 10, 15,
H - Hi Effy, Multi-
Airflow Type &
speed, 1-5 - nom.
Capability
Tonnage (cfm/ton)
Power Supply
208-230/1/60
System Control
Type
Minor Design
Modifications
Unit Parts
Identifier
The cabinet size in this example is B.
Record Your Cabinet Size = _________
Air Handler Model Number Matrix
Digit
1
2
3
Example
T
A
M
T
A
M
Letter
Sequence
20, 25)
Standard
- 24 VAC
Letter
Sequence
Letter
Sequence
4
5
6
7
8
7
A
0
B
3
7
A
0
A
B
C
0-9
0-9
This matrix is provided as an example only.
INSTALLER'S GUIDE
9
10
11
12
13
0
H
2
1
S
0-9
0-9
H
1-5
1
S
14
15
A
A
A
A
Page 3
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