How The ECO3 Works

Using Compressor Optimization to Save Energy

Smartcool's ECO3 is installed between the thermostat and the compressor in order to collect data, analyse and then optimize how the two are interacting.

The result is an average 20% saving on energy (kWh) used by the compressor. This lowers your utility bills, giving you a payback in 12 to 36 months depending on how large your cooling system is and how much it runs.

The more cooling you use, the more Smartcool can save you on your electricity bill.

  1. The Problem with Conventional Cooling
  2. Smartcool ECO3 Intelligent Cooling

The thermostat is responsible for monitoring temperature in the 'controlled space' (a room or other space with controlled climate). As the temperature in that space rises above a certain level, the thermostat will call for the compressor to begin running in order to drop the temperature back to the required level.

ECO3 Chart

When the compressor first begins to run it has high suction pressure, low head pressure, a warm evaporator and a cold condenser.

These ideal conditions mean that the system is operating very energy efficiently at the start of its cycle, often running as much as 50% above the rated cooling capacity.

After just a short period of run time the operating conditions change and cooling capacity drops. At this point, the system is running much less efficiently and consuming more energy for each degree of cooling.

By the end of the cooling cycle, the compressor is often working twice as hard and using double the energy as it was at the beginning of the cycle.

The ECO3 begins learning about your cooling system as soon as it is wired in between your compressor and your thermostat.

It analyses real-time demand trends and uses its strategic energy management software to find the opportunities for energy efficiency improvements in the cooling cycle. This learning process is dynamic and on-going.

No matter what operating conditions your system is experiencing, the ECO3 will understand and adjust the energy management plan accordingly.

ECO3 Chart

The cooling cycle starts as usual with your thermostat telling the compressor to run in order to cool the controlled space.

Based on the data it has gathered, the ECO3 may choose to interrupt or delay this signal in order to improve the energy efficiency of the compressor by keeping it operating near maximum capacity.

This is achieved by cycling the compressor off and on within manufacturer safety specifications. The ECO3 will turn the compressor off before system suction pressure drops, head pressure rises, the evaporator cools down and the condenser warms up. It will give the compressor a rest period, and restart it again when its conditions allow for maximum capacity.

In this way, the ECO3 ensures the compressor is running more often under ideal operating conditions than under inefficient operating conditions.

The ECO3 can increase compressor performance up to 50% over the rated capacity. This typically cuts the time the compressor runs by 10% to 20%, and often up to 30%.

By reducing how long the system has to run in order to cool a space, the ECO3 saves an average 15% of the energy (kWh) used by the compressor.

Savings Check

Savings Check


“With the ECO3 we are able to provide our customers with the same high quality climate control they expect, while saving them money and ultimately greenhouse gas emissions."

Bruce Kemp, President of Van’s Electric

“We are enjoying a great deal of success as a distributor of Smartcool’s ECO3, which is an important addition to the energy efficiency solutions we offer our customers.”

Doug Overvold, President of Total Energy Concepts

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