192
AIRAH
Economic life of equipment
Equipment
Air conditioning unit – Package (10 kW – 100 kW)
Air conditioning unit – Room type
Air conditioning unit – Split units (up to 10 kW)
Air conditioning unit – Split package (10 kW – 100 kW)
Air filters – Dry media disposable
Air filters – HEPA
Air filters – Kitchen hood grease filters (monthly clean)
Air handling unit – Custom built central station
Air handling unit – Proprietary line central station single or multiple zone
Automatic controls and instrumentation
Boilers – Cast iron
Boilers – Finned copper tube heat exchanger
Boilers – fire tube
Boilers – water tube
Boilers electrode
Coils to Cooling and heating
Cooling towers
Ductwork and fittings
Electric motors
Electric storage heaters
Electric strip heaters
Electrical final circuits and outlets
Electrical mains cables
Electrical switchgear and distribution equipment
Fans
Fire alarm systems
Gas convection heater
Generators – Diesel
Generators – Electric
Heat exchangers
Kitchen equipment
Laundry equipment
Lighting installations
Pipe work and valves
Pumps
Radiators – Hot water
Refrigeration chillers – Absorption
Refrigeration chillers – Centrifugal
Refrigeration chillers – (Reciprocating, screw)
Tanks
Variable air volume – Terminal units
Economic life (years)
10 to 15
7 to 10
7 to 10
10 to 15
6 to 18 months
1 to 5
3 to 6
20 to 30
20 to 25
20 to 25
25 to 30
20 to 25
15 to 20
25 to 30
15 to 20
20 to 25
10 to 25
20 to 30
20 to 25
20 to 25
8 to 12
20 to 25
25 to 30
25 to 30
15 to 20
20 to 25
15 to 20
15 to 20
15 to 20
20 to 25
15 to 20
15 to 20
20 to 25
20 to 25
20 to 25
20 to 25
20 to 30
20 to 25
15 to 25
20 to 30
15 to 25