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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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Heating - Service Life Data per Above Criteria
[Total # of Matching Buildings: 262]
[Total Pieces of Equipment found: 4794]
* 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
No heating plant
2
2
26.5
26.5
4.9
6.8
30.0
23.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Boiler, cast iron
12
12
23.6
24.0
9.1
5.9
35.0
4.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Boiler, electric hot water
4
4
19.3
22.0
7.6
7.4
25.0
8.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Boiler, steel fire-tube, forced draft, hot water
12
10
14.0
12.0
7.2
6.3
23.0
7.0
2
25.0
25.0
n/a
n/a
25.0
25.0
Boiler, steel fire-tube, forced draft, steam
10
10
36.8
38.0
9.0
7.9
46.0
23.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Boiler, steel fire-tube, natural draft, hot water
11
11
17.5
17.0
4.1
3.3
24.0
12.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Boiler, steel water-tube, forced draft, hot water
56
42
19.6
15.0
13.9
4.8
51.0
4.0
14
22.6
21.0
9.4
7.0
33.0
10.0
Boiler, steel water-tube, forced draft, steam
4
4
37.0
37.0
1.0
1.1
38.0
36.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Boiler, steel water-tube, natural draft, hot water
47
35
17.9
19.5
12.1
5.6
40.0
3.0
12
18.0
18.5
4.9
3.9
23.0
11.0
Chiller, heat recovery, centrifugal
2
1
25.0
25.0
n/a
n/a
25.0
25.0
1
65.0
65.0
n/a
n/a
65.0
65.0
District heating
9
9
29.2
37.0
16.4
10.7
57.0
6.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Heat exchanger, horizontal ground
7
7
10.9
11.0
2.0
1.5
13.0
8.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Heat exchanger, horizontal (trench) ground
9
8
13.8
13.0
2.7
1.9
20.0
11.0
1
17.0
17.0
n/a
n/a
17.0
17.0
Heat exchanger, ground water, aquifers
35
28
23.2
18.5
12.8
4.7
53.0
7.0
7
32.0
21.0
27.8
20.6
88.0
8.0
Heat exchanger, ground water, standing column well
6
4
11.8
12.0
1.3
1.3
13.0
10.0
2
51.5
51.5
34.6
48.0
76.0
27.0
Heat exchanger, vertical bore
214
144
11.3
11.0
5.7
1.0
37.0
-16.0
70
27.6
25.0
13.6
3.7
69.0
4.0
Heat exchanger, surface water, closed loop
2
2
11.5
11.5
6.4
8.9
16.0
7.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Municipal water plant
6
6
10.7
11.0
2.2
1.8
13.0
7.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Other heating equipment
4234
4192
15.1
16.0
9.5
4.5
35.0
-1.0
42
23.2
25.0
7.5
6.6
34.0
16.0