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Service Life Data Query
Use various criteria to evaluate the potential service life in
different HVAC components in different building environments

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Function
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Age (years)
Height (stories)
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Heat Rejection - Service Life Data per Above Criteria
[Total # of Matching Buildings: 111]
[Total Pieces of Equipment found: 261]
* Equipment with no units, not shown. View full HVAC Equipment List here
Currently in Service Replaced
Total
Units
No.of
Units
 Equipment Age (years)
No.of
Units
 Age at Removal (years)
Mean
Median
Std Dev
95% C.I.
Max
Min
Mean
Median
Std Dev
95% C.I.
Max
Min
Condenser, air-cooled
13
11
16.0
10.0
13.3
11.7
37.0
5.0
2
20.0
20.0
n/a
n/a
20.0
20.0
Condenser, evaporative
5
5
22.3
18.5
10.0
9.8
37.0
15.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Condenser, water-cooled
3
3
21.0
21.0
n/a
n/a
21.0
21.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Cooler, closed circuit
7
7
8.8
6.5
5.7
5.6
17.0
5.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Cooling tower, ceramic
3
3
27.5
27.5
0.7
1.0
28.0
27.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Cooling tower, fiberglass
2
2
25.0
25.0
n/a
n/a
25.0
25.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Cooling tower, metal
188
162
17.4
17.5
9.5
1.8
42.0
3.0
26
19.8
17.5
7.0
3.2
35.0
12.0
Cooling tower, wood
8
8
24.5
24.5
1.3
1.3
26.0
23.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Heat exchanger, condenser water
1
1
27.0
27.0
n/a
n/a
27.0
27.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Heat exchanger, water-to-water
1
1
23.0
23.0
n/a
n/a
23.0
23.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Other heat rejection equipment
30
30
8.0
8.0
n/a
n/a
8.0
8.0
0
n/a
n/a
n/a
n/a
n/a
n/a