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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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Air Distribution - Service Life Data per Above Criteria
[Total # of Matching Buildings: 344]
[Total Pieces of Equipment found: 27750]
* 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
Air handling unit, constant volume
206
184
25.9
27.0
11.9
4.8
46.0
6.0
22
34.7
40.0
20.5
23.2
52.0
12.0
Air handling unit, dual duct
20
20
36.5
37.0
6.6
5.3
45.0
25.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Air handling unit, multizone
229
229
30.4
24.5
18.4
8.5
76.0
6.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Air handling unit, single zone
87
87
21.7
18.5
12.5
7.7
44.0
10.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Air handling unit, variable air volume
962
893
18.6
20.0
8.8
1.8
47.0
-20.0
69
28.2
26.0
12.4
6.3
64.0
12.0
Air handling unit, variable volume, variable temperature
196
61
20.1
21.5
9.2
5.2
34.0
4.0
135
12.0
12.0
n/a
n/a
12.0
12.0
Fan coil unit
2884
1605
26.8
27.0
13.8
6.0
51.0
6.0
1279
36.5
36.5
24.4
19.5
65.0
4.0
Heat pump, air-to-air
1296
1295
14.1
14.0
5.7
4.2
20.0
3.0
1
17.0
17.0
n/a
n/a
17.0
17.0
Heat pump, water-to-air, geothermal application
15090
11368
11.9
12.0
5.4
0.8
37.0
5.0
3722
27.6
25.0
13.5
3.6
69.0
8.0
Heat pump, water-source
1484
1379
17.5
21.0
7.1
2.8
27.0
4.0
105
16.5
16.5
0.7
1.0
17.0
16.0
Heat pump, water-to-water, geothermal application
28
28
12.0
13.0
1.7
1.9
13.0
10.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Packaged DX unit, air-cooled
32
32
14.1
15.0
7.0
4.1
27.0
6.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Packaged DX unit, rooftop
220
215
15.6
16.0
6.8
2.1
37.0
3.0
5
21.3
22.0
5.4
5.3
27.0
14.0
Packaged DX unit, water-cooled
187
177
14.8
17.0
9.0
4.3
35.0
4.0
10
22.0
22.0
n/a
n/a
22.0
22.0
Packaged terminal air conditioner/heat pump
231
231
27.0
27.0
14.1
19.5
37.0
17.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Residential furn. and pkg'ed condensing unit/heat pump
132
132
31.0
31.0
n/a
n/a
31.0
31.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Split DX system
174
173
17.9
19.0
4.9
3.2
24.0
7.0
1
17.0
17.0
n/a
n/a
17.0
17.0
Other air distribution equipment
3089
3027
13.6
11.0
12.2
5.6
51.0
-1.0
62
20.5
20.5
6.4
8.9
25.0
16.0