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AircoSaver

What is an AircoSaver?The Airco Saver is an Electronic Control Unit which adds state-of-the art intell igence to aircondit ioning syst ems. Air condit ioning is one of t he largest energy consumer s in t heresident ial and indust ri al sect or. Thousands of air condit ioners put high demands on elect ricgrids already st rained t o capacit y. On a small er scale, air condit ioning probably account s for asignificant part of most energy bil ls and electric costs are rising rapidly!Many existing air conditioners use old and quite inefficient technology. Although improvedt echnology has become availabl e in more expensive syst ems (e. g. invert er t echnology), t hepayback t im e of t hese syst ems is st i l l very l ong.Inst ead of i nvest ing a lot of money int o an expensive new syst em, t here is an easy andaff ordable way to improve t he energy

eff iciency of your air condit i oning unit -Upgrade i t wit h an Aircosaver.

Why Use AnAircoSaver?When swit ched on, t ypical aircondit ioning syst ems operat e cont inuouslyuntil the room thermostat senses the desiredt emperature and t urns t he syst em off . As t he roomwarms up, t he thermost at swit ches t he air condit ioner back

on and t he cycle r epeats. Air condi t ioning syst ems are usuall ydimensioned to cope wit h t he extrem e cool ing demands of t he fewhottest days of the year (plus a safety margin). However, in mostoperat ional condit ions, t his maximum output is not required and the syst em isoversized. So running the system continuously until the room thermostat switches it off meanst hat t he syst em operates wit h excess capacity m ost of t he t i me.A typi cal cooling cycle wi t h excess capacity l ooks lik e t his:

When the cycle st art s, t he compressor pushes cooling energy into t he heat exchanger w hichacts as an energy storage. At this stage, the system works with high efficiency because compressorsoperat e most ef f ic ient ly w hen fu l ly loaded.

In normal w eather condit ions, t he energy st orage is soon full y "charged up". From t his point

onwards, t he compressor provides more cooling energy than t he heat exchanger can t ake up(t hermodynamic saturat i on). Running the compr essor beyond t his st age does not increase t he cooling eff ect any more. It s

j ust a w ast e of en er gy!

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How Does The AircoSaver Work?The Air cosaver compensat es f or t he short comings of t ypical air condit ioning syst ems by addingintell igence. Its sensor-driven software algorithms are designed to detect thermodynamicsaturat ion and to opti mize t he compressor accordingly. When overcapacit y is det ected, t heAircosaver swi t ches t he compressor off and avoids inef f icient overcooling. Your unit swi t chesint o "saver mode". The f an keeps running and your syst em m akes maxim um use of t he st oredcooling energy in t he heat exchanger. Once t he st ored energy is used up, t he compr essor can

work eff icientl y again and is swit ched back on. The set room t emperature i s reached wi t houtt he ineff icient part s of t he cool ing cycle. This result s in signif icant energy savings, 20-30%,without compromising cooling comfort. Since the correct point to switch the compressorvaries fr om unit t o unit and changes wit h dif f erent weather condit ions, t he Aircosaver isconstantly adapting its settings to ensure efficient operation of your air conditioning systemat al l t imes.The Aircosaver is an easy and inexpensive w ay t o make m ost air condit ioners much mor e costeff ect ive. Any elect ri cian or HVAC t echnician can inst all an Aircosaver in less t han 30 minut es.The tot al cost for both t he Aircosaver and inst al lat i on wi l l have a retur n on invest ment of l esst han 24 mont hs!

DOMINO PIZZA STORE6873 L UBBOCK , TEXAS

5 TON TRANE A/C PRE-TEST

40 MI N @3 SEC INTERVALS 880

READINGS

COMPRESSORRANCONTINOUSLYFOR40MINUTES

AMPSL1

AMPS

L2

AMPS

L3

AMPS

TOTAL

KWH

TOTAL

KW

TOTAL

20.87 17.9 13.79 52.56 4.4 5331.871

17.35 15.69 12.26 45.29 3.666 4487.646

3.52 2.21 1.53 7.27 0.734 844.225

16.90% 12.30% 11.10% 13.80% 16.70% 15.80%

PRETEST

POSTTEST

DIFFERENCE

PERCENTOFCHANGE

5 T ON T RANE A /C POST-TEST

40 M IN @3 SEC INTERVALS 880

READINGS

COMPRESSORRAN

33.85

MINUTES

COMPRESSORWASOFF6.15MINUTES

TOTALSAVINGSONTHEA/CUNITWILLBECLOSER

TO20%BECAUSETHECOMPRESSOR

ISOFF3MINUTESOUTOFEACH15MINUTE

PERIOD

TESTWASRUNONAPRIL22,2009. OUTSIDE

TEMPERTUREWAS88DEGREES

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Domino's PizzaYear Submitted: 2009

Process: Reduction of electricity generation through installations of the Airco Saver HVAC efficiencyproduct

Industry: Restaurant

Wastes Reduced: CO2, SO2, NOx

Location: San Antonio TXNo. of employees: 480

Contact: Mike Bernal, Director of Operations

Phone: 210-651-6663

Description:Domino's and its franchisees such as our firm have been "Green Minded" for many years and we feel it is ourresponsibility to be good stewards of the environment and reduce pollution as well as saving on electric costs whiledoing so. We choose to do our part to reduce pollutants through reduced energy usage. It is essential that allbusinesses prove to their shareholders that the bottom line will be increased by energy efficiency withdocumentable improvements to the environment.

This case study is for South Texas Pizza Inc, doing business as Domino's.

P2 Application:The annual reduction from 48 of our stores of 1,211,000 pounds of CO2, 2,580 pounds of SO2 and 1,892 poundsof NOx (source EPA Power Profiler attached) is a direct result of the installation of an HVAC controller on eachDomino's facility air conditioner. The controller is simply installed in a matter of minutes on air conditioning systemsand immediate energy reductions are realized. Which in our case is in excess of twenty one percent (21%) for anannual savings of $156,863. The return on investment of the projects is under one (1) year. This is phase one of a140+ store project. Total Cost Savings: $156,863.00 Comments: The extrapolated seven (7) year annual savings based on a realistic $.14 per kWh withoutfactoring in future rate increases is $1,098,041. A total of 8,477,000 pounds of CO2, 18,060 pounds of SO2 and13,244 pounds of NOx pollutants will be removed from our atmosphere. South Texas Pizza Inc DBA Dominos isproud to do its part to clean up the environment.

Details of Reductions 1,211,000.0 - lbs of CO2Comments: The unit is pounds per year. Total annual savings for CO2, SO2, and NOx combined = $156,863.00 2,580.0 - lbs of SO2Comments: The unit is pounds per year. Total annual savings for CO2, SO2, and NOx combined = $156,863.00 1,892.0 - Pounds/year of NOxComments: total savings with CO2, SO2, and NOx reductions =$156,863.00

Additional Information :The energy savings reports were initially provided to us after extensive certified data logging wascompleted. The monetary savings are backed up by the monthly billings