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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

Region region details
State
Function
Size (sf)
Age (years)
Height (stories)
BOMA Class
Location
SYSTEM TYPE
Equipment Type
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Control - Service Life Data per Above Criteria
[Total # of Matching Buildings: 321]
[Total Pieces of Equipment found: 2469]
* 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
Energy mgmt. system, all electronic components
101
77
12.5
11.0
7.0
1.6
37.0
5.0
24
22.1
18.0
16.3
6.5
69.0
8.0
Energy mgmt. system, all pneumatic components
20
19
16.2
17.0
7.2
3.2
28.0
6.0
1
11.0
11.0
n/a
n/a
11.0
11.0
Energy mgmt. system, direct digital controls
146
115
10.9
10.0
5.2
1.0
26.0
-6.0
31
24.7
25.0
13.4
4.7
52.0
4.0
Energy mgmt. system, hybrid system with elec./pneumatic components
133
101
13.6
13.0
5.3
1.0
26.0
3.0
32
16.7
14.0
11.7
4.1
48.0
1.0
Manual control
7
6
14.3
11.5
11.3
9.0
37.0
7.0
1
76.0
76.0
n/a
n/a
76.0
76.0
Pneumatic controls
19
19
35.0
37.0
7.7
3.8
51.0
17.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Thermostats, electric
1
1
22.0
22.0
n/a
n/a
22.0
22.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Time clock
18
16
9.3
4.0
10.5
10.3
25.0
4.0
2
20.0
20.0
n/a
n/a
20.0
20.0
Other control system
38
30
15.0
13.0
7.7
2.8
42.0
6.0
8
32.6
25.0
24.9
17.3
88.0
11.0