LESP                                           Phone: 562.202.1291

3531 Thor Ave.    

Los Alamitos, CA 90720  


The following is an overview of one of several LESP's Energy Efficiency Retrofit. For detailed product information, including a video on how LESP's Energy Efficiency Retrofit uses compressor optimization to save energy, contact us at 


LESP Energy Efficiency retrofit for ACs is a product that can save an average of 15% kWh energy used by the compressor in air conditioning, refrigeration and heat pump systems (HVAC-R). LESP Energy Efficiency retrofit for ACs achieves savings using intelligent cycle optimization technology.

ECO3 Energy Efficiency Solution

The LESP Energy Efficiency retrofit for ACs, Heatpumps and Small refrigeration systems, can improve energy efficiency for one or two compressor or stage systems including:

  • Packaged air conditioning systems - both residential and commercial
  • Small commercial refrigeration systems
  • Combined heat pump systems - both residential and commercial

Even on the most modern equipment with intelligent controls, or where other energy saving processes are already installed, LESP Energy Efficiency retrofit for ACs, Heatpumps and small commercial refrigeration systems, provides energy efficiency gains.


Our Energy Efficiency retrofit works with any control system on these types of cooling units, including systems with any load profile, night set-back routine, non-demand related interruptions, demand limiting and demand response functionality.

Our Energy Efficiency retrofit interfaces with existing controls and equipment, and installation can be completed in an hour without any system interruption or impact on controlled space conditions.

LESP can provide additional functionality for even the most complex systems.

Air Conditioning Energy Saver

If you use Air-Conditioning to cool your building you could be wasting up to 30% of all the energy it consumes!

When switched on, typical air conditioning systems operate continuously until the room thermostat senses the desired temperature and turns the system off. As the room warms up, the thermostat switches the air conditioner back on and the cycle repeats.

Air conditioning systems are usually dimensioned to cope with the extreme cooling demands of the few hottest days of the year (plus a safety margin). However, in most operational conditions, this maximum output is not required and the system is oversized. So running the system continuously until the room thermostat switches it off means that the system operates with excess capacity most of the time.

A typical cooling cycle with excess capacity looks like this:

  • When the cycle starts, the compressor pushes cooling energy into the heat exchanger which acts as an energy storage. At this stage, the system works with high efficiency because compressors operate most efficiently when fully loaded.
  • In normal weather conditions, the energy storage is soon fully "charged up". From this point onwards, the compressor provides more cooling energy than the heat exchanger can take - we call this 'thermodynamic saturation'.
  • Running the compressor beyond this stage does not increase the cooling effect any more. It's just a waste of energy!

    This is where an Air Conditioning Energy Saver cuts in. Its sensor-driven software algorithms are designed to detect thermodynamic saturation and to optimize the compressor accordingly. When overcapacity is detected, Air Conditioning Energy Saver switches the compressor off and avoids inefficient overcooling.

    When Air Conditioning Energy Sensor switches into “saver mode”, the fan keeps running and your system makes maximum use of the stored cooling energy in the heat exchanger. Once the stored energy is used up, the compressor can work efficiently again and is switched back on. The set room temperature is reached without the inefficient parts of the cooling cycle. This results in energy savings of up to 30% without compromising cooling comfort.

    Benefits you could enjoy with an Air Conditioning Energy Saver include:

    • Energy Savings of up to 35%
    • Payback in Less than 24 Months
    • Retrofit product to upgrade existing units
    • Quick & Simple Installation
    • Excellent Alternative to an Expensive New System
    • Anti-Short Cycling & Power Outage Protection