This letter confirms that a test evaluation of the Airco Saver (Energy Saving Device) of Shobuj-Bangla Energy was carried out on an 24,000BTU General Split Type Air Conditioning unit installed at Corporate office of North-West Power Generation Company Ltd. Biddut Bhaban (Level-l3), 1 Abdul Gani Road. Dhaka-1000. The test evaluation report dated September 4,2014 showed energy saving of 30% recorded by an energy meter and was completed and witnessed by our Engineer. We would have no hesitation in recommending Airco Saver to potential clients as cost effective way to reduce electrical consumption. We commend Shobuj-Bangla Energy for launching this innovative product. Our best wishes to Shobuj-Bangla Energy.

This is to confirm that we have installed total 41 nos energy efficient device namely "Airco Saver' to the air conditioners at our three branches/offices recently from Shobuj-Bangla Energy. It was found that after installation of the devices "Airco Savers" to the air conditioners, the electricity bills has been reduced to on an average 15-20%.

This is for the general information that we, BEXIMCO IT Division, have installed 15 units of Airco Saver (an energy efficiency device for Air-conditioning system) on a test basis and the installation was carried out by SBEnergy Ltd., House# CWN (A) 34, Road# 35, Gulshan-2, Dhaka-1212, Bangladesh. Our test result confirms energy savings up to 15%. We have not observed any performance issues with the Air Conditioners during a three months' test period. Based on the satisfactory result, we are planning to install more Airco Savers in future. Our best wishes to SBEnergy Ltd

This is to confirm that, we tested and installed energy saving device, AIRCOSAVER of Shobuj-Bangla Energy on our various Air Conditioning units on 200 BTS sites throughout Bangladesh on a pilot project. In our opinion, AIRCOSAVER has proven substantial energy saving potential without compromising cooling comfort. We have not observed any performance issues with the Air Conditioners during a three months' test period

This is to certify that, we tested Airco Saver (Energy Efficiency Device for Air Conditioners) as a pilot project & the installation was carried out by Shobuj Bangla Energy. We noted an average energy savings 20% with the Airco Saver(s) installed without compromising cooling comfort. We would have no hesitation in recommending AIRCO SAVER to potential customers as a cost effective way to reduce electrical consumption & green house gas emissions. Our best wishes to Shobuj-Bangla Energy.

This is to confirm that, we tested and installed energy saving device, Airco Saver of Shobuj-Bangla Energy on our Platinum Suites Hotel in Banani which is owned by Sheltech Pvt. Ltd. In our opinion, Airco Saver has proven substantial energy saving potential without compromising cooling comfort. We have no hesitation in recommending AIRCOSAVER to a potential client as a cost effective way to reduce energy consumption. Our best wishes to Shobuj-Bangla Energy.

I have witnessed meter readings before and after the installation of the AircoSaver and the completed empirical data analysis.. Of these applications, the AircoSaver showed reductions of 20 to 35% in consumption (kWh). Without exception the total energy consumption of the compressor has been reduced and by extension, the kWh will be reduced resulting in a reduction of utility charges.

Cell sites in San Diego contain electronic equipment cooled with oversized package air conditioning systems. The oversized cooling systems are 100% redundant. A typical cell site will have two 5 ton wall-mount or split system package air-conditioning units. Generally, the cooling units provide cooling for the internal heat loads only without outside makeup air to cool. The amount of electronic equipment in each cell site can vary widely, and the typical 5 ton cooling units provided are generally over sized for potential addition of electronic equipment. Typical thermostat control for the air-conditioners will initiate air conditioner start and stop to satisfy room temperature set-points. Since many of the air-conditioning units are oversized, this typical control system leaves a lot of stored energy in the oversize airconditioner evaporator. This report examines the air conditioner energy consumption resulting from a control device (AircoSaver), added to the thermostat control circuit, that controls the operation of the air conditioner to minimize stored energy in the evaporator and reduce the average air-conditioned energy consumption. Nine cell sites in the San Diego area were selected to quantify air conditioner energy savings resulting from the installation of the AircoSaver.

A total of 31 days of monitoring of the four HVAC units using an Intellimeter monitoring system was completed. The average daily outdoor temperature during this period was 25.5 degrees Celsius and the average indoor set point temperature was 21 degrees Celsius. The average external relative humidity reading for the study period was 65%. Finally, the secondary outcome for this study was to determine if the Aircosaver technology increased the number of compressor starts, thus potentially increasing the wear and tear on the compressor components versus the control units. The Airco unit was the only retrofit technology that offered reliable data to make this determination. The data did not suggest that the retrofit technology posed a significant difference in the number of “hard starts” on the experimental units in comparison to the control units, in fact the control units had on average 30% more hard starts, but that is also in keeping with the efficiency difference noted at baseline testing. In conclusion, the Airco Saver showed an average increase in energy efficiency of 33 % over our control units.

AIRCOSAVER was tested by VSO Technical Facilities Engineering during 01/24/2009 to 03/20/2009 for winter testing and 06/08/2009 to 06/10/2009 for summer testing. • Winter Air-conditioning operating cost was reduced 19.5%. • Summer Air-conditioning operating cost was reduced 21.6%. • There has been no indication of any adverse effects on the air conditioning equipment

Power consumption was recorded by an energy meter installed by us specifically to measure the power saving performance. The meter shows an average power saving of 15% achieved to date. We are pleased to note that their device is saving more than the assured level. Ecopower’s after sales service is satisfactory. We have no hesitation in recommending this technology for other AC systems.