Database Main Page
Project Summary
Preferences
Model Your Building
Service Life Data
by System Type
Maintenance Cost Data
by All Options
by Region
by State
by BOMA Class
by Function
by Size
HVAC Equipment List
Related Documentation
Download Database
Submit HVAC Data
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
reset

Download Dataset [excel]

Miscellaneous - Service Life Data per Above Criteria
[Total # of Matching Buildings: 108]
[Total Pieces of Equipment found: 2254]
* 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
Baseboard/Finned Tube Radiation
100
100
18.1
21.0
7.8
4.4
25.0
4.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Cogeneration
2
2
15.0
15.0
n/a
n/a
15.0
15.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Computer room air conditioning unit, chilled water
268
268
17.7
20.5
7.8
4.8
30.0
5.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Computer room air conditioning unit, water-cooled DX compressor
94
91
13.6
13.0
6.6
3.0
23.0
3.0
3
14.0
14.0
5.7
7.9
18.0
10.0
Domestic hot water heater, electric
309
273
15.5
17.5
8.2
2.0
34.0
-1.0
36
11.8
12.0
5.4
2.5
26.0
2.0
Domestic hot water heater, natural gas
26
20
13.1
8.5
8.9
5.0
35.0
5.0
6
15.0
15.0
7.0
7.9
22.0
8.0
Exhaust fan
226
222
20.2
21.0
8.4
2.1
46.0
-1.0
4
18.3
16.0
6.8
7.7
26.0
13.0
Fresh Air Units
43
41
18.9
21.0
7.5
2.8
34.0
5.0
2
16.0
16.0
n/a
n/a
16.0
16.0
Fume Hoods/Cabinets
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
Heat exchanger, plate and frame
11
11
13.1
8.0
8.2
5.4
25.0
5.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Heat exchanger, heat pipe
2
2
5.0
5.0
n/a
n/a
5.0
5.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Heat exchanger, heat wheel
2
1
-1.0
-1.0
n/a
n/a
-1.0
-1.0
1
42.0
42.0
n/a
n/a
42.0
42.0
Heat exchanger, hot water
3
3
38.0
38.0
n/a
n/a
38.0
38.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Heat recovery unit, air-to-air
2
2
10.0
10.0
n/a
n/a
10.0
10.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Humidifiers
3
1
7.0
7.0
n/a
n/a
7.0
7.0
2
23.0
23.0
n/a
n/a
23.0
23.0
Perimeter heating, supplemental heating
810
810
24.2
23.0
7.1
4.6
38.0
15.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Refrigeration equipment (ice machines, walk-in coolers/freezers)
13
12
10.3
10.5
8.4
8.2
18.0
2.0
1
42.0
42.0
n/a
n/a
42.0
42.0
Smoke control
15
15
17.5
17.5
3.5
4.9
20.0
15.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Unit heater, electric
138
131
13.5
10.0
8.4
3.7
29.0
3.0
7
13.0
12.5
8.1
7.9
21.0
6.0
Unit heater, natural gas
12
12
23.0
23.5
1.7
1.4
25.0
21.0
0
n/a
n/a
n/a
n/a
n/a
n/a
Other miscellaneous equipment
163
157
19.4
20.0
11.2
3.5
46.0
-1.0
6
18.0
16.0
7.2
6.3
26.0
8.0
Dehumidifier, solid dessicant
2
1
-1.0
-1.0
n/a
n/a
-1.0
-1.0
1
42.0
42.0
n/a
n/a
42.0
42.0