This calculator quantifies the potential energy, dollar and greenhouse gas savings made by making the following changes to a compressed air system.

1. Repairing leaks : prevent wasted air generation and avoid extra generating capacity

2. Reducing system pressure : many businesses run their system's pressure too high and waste energy

3. Reducing inlet air temperature : compressor units operate more efficiently at cooler temperatures. Does your unit use hot air from a boiler room or factory floor? Or does it draw cool air from outside?

To perform the potential savings calculations for each section, you need to complete the blue fields and press the CALCULATE button.

Compressed Air System Data

System pressure (found on your compressor manual)			kPa (Metric)
Operating hours per year   (multiply hours/day x work days/year)			PSI (Imperial)
Electricity costs (cents per kWh) (found on your electricity bill)
1. Potential Savings by Reparing Leaks
Leak size	Number	Air loss
Less than 1 mm			(cubic metres/year)
From 1 to 3mm			(cubic metres/year)
From 3 to 5mm			(cubic metres/year)
Greater than 5 mm			(cubic metres/year)
Total air loss :			(cubic metres/year)
If you repaired all these leaks, you would save cars from the road.
2. Potential Savings by Reducing Pressure
Current air pressure			kPa
If you reduced your air pressure to			kPa
You could save % on your compressed air system running costs.
3. Potential Savings by Reducing Inlet Air Temperature
Current air intake temperature			degrees C
Ambient temperature outside			degrees C
Ducting air from outside will reduce your energy costs by %

Assumptions:

• Sharp edged orifice, 0.75 cents per cubic metre (Ingersoll Rand, Atlas Copoc).
• Air loss data based on information from Ingersoll Rand and E-Source.
• 3 C drop in temperature equals 1% savings.
• 100kPa drop in pressure equals 8% energy savings.