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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='color:#1F497D'>Thanks Kelsey, that's good to know.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>For cooling savings float works fine for just cooling mode, but not heat/cool. With the fixed set-point option it looks like the heat/cool mode works much better, it works the same as float in cooling only mode when you set the cooling temp down to 30.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>But the ERV still operates outside of a typical control sequence and still undercuts the theoretical energy savings.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>The heating load increases considerably in fixed setpoint mode, over float. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>A constant wheel speed, an off mode, and a floating temperature is standard for the price devs will pay down here.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>The optimal savings happens for heating in float and for cooling in float + cooling only. The float heat/cool should be achievable, unless it butts heads with other system operations in eQuest.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:10.0pt;font-family:Helvetica-Bold'>DESIGN CONDITIONS & CONTROL STRATEGIES<o:p></o:p></span></b></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:10.0pt;font-family:Helvetica-Bold'>Standard temperature control<o:p></o:p></span></b></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>The unit can be configured with normal air flows and<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>controls but still have the benefit of a large amount of<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>makeup air, better humidity control and lower<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>operating cost than a unit without a heat wheel. The<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>energy recovery unit operates in four (4) basic modes;<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>fan only; economizer; cooling and heating. Each of<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>these modes has specific functions as defined below.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:10.0pt;font-family:Helvetica-Bold'>Fan only mode: </span></b><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>When the unit supply fan is started,<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>and there is no call for cooling or heating, the unit<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>economizer moves to its minimum position, the<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>heatwheel is activated and the heatwheel fan is<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>started. If the unit is equipped with heatwheel bypass<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>dampers, these are closed.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:10.0pt;font-family:Helvetica-Bold'>Economizer mode: </span></b><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>With the unit supply fan in<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>operation and a call for cooling is made, if the outdoor<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>air temperature and humidity are below the enthalpy<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>setpoint, the heatwheel exhaust fan is activated, the<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>heatwheel is deactivated and the economizer<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>modulates to maintain the mixed air setpoint. If the unit<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>is equipped with heatwheel bypass dampers, these<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>are opened to accommodate the increase in outside<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>air volume.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:10.0pt;font-family:Helvetica-Bold'>Cooling mode: </span></b><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>With the unit supply fan in operation<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>and a call for cooling is made, if the outdoor air<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>temperature and humidity are above the enthalpy<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>setpoint, the economizer moves to its minimum<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>position and mechanical cooling is activated. The<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>heatwheel is activated and the heatwheel exhaust fan<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>is started. If the unit is equipped with heatwheel<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>bypass dampers, these are closed.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><b><span style='font-size:10.0pt;font-family:Helvetica-Bold'>Heating mode: </span></b><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Upon a call for heat, the heating<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>function is activated, the supply fan is activated and<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>the economizer moves to its minimum position. The<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>heatwheel is activated and the heatwheel exhaust fan<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>is started. If the unit is equipped with heatwheel<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>bypass dampers, these are closed.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>Notice that in all four (4) basic above modes, the<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>operation of the heatwheel is determined by the<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>position of the economizer. With the exception of unit<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>shutdown or a night setback mode, the heatwheel<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>exhaust fan is in operation.<o:p></o:p></span></p><p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>When control systems are "by others", all of the above<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Helvetica","sans-serif"'>modes of operation must be considered.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>As for Daniel's project, he is getting the short end of the stick on his heating savings when he switches to fixed setpoint and a shorter end when in float. <o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'>Maybe the weather file does not have enough high enthalpy days for the ERV to make a difference in cooling mode, (the enthalpy exchangers do make a big difference in cooling mode using a Miami weather file).<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><b><span style='color:#1F497D'>Joe Fleming<o:p></o:p></span></b></p><p class=MsoNormal><i><span style='font-size:10.0pt;color:#333333'>E.I., LEED AP BD+C, BEMP<o:p></o:p></span></i></p><p class=MsoNormal><i><span style='font-size:10.0pt;color:#333333'>Mechanical Engineer I<o:p></o:p></span></i></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='color:#006363'>TLC Engineering for Architecture<br></span></b><b><span style='font-size:10.0pt;color:#006363'>Your 2030 Challenge Partner</span></b><b><span style='color:#006363'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>800 Fairway Drive, Suite 250<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>Deerfield Beach, FL 33441-1816<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p></div><table class=MsoNormalTable border=0 cellspacing=0 cellpadding=0><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;color:#333333'>phone: </span><span style='font-size:9.0pt;color:#555555'><o:p></o:p></span></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>954-418-9096</span><span style='font-size:10.0pt;color:#1F497D'><o:p></o:p></span></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;color:#333333'>fax: </span><span style='font-size:9.0pt;color:#555555'><o:p></o:p></span></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>954-418-9296</span><span style='font-size:10.0pt;color:#1F497D'><o:p></o:p></span></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;color:#333333'>direct: </span><span style='font-size:9.0pt;color:#555555'><o:p></o:p></span></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>954-418-4591</span><span style='font-size:10.0pt;color:#1F497D'><o:p></o:p></span></p></td></tr><tr><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal align=right style='text-align:right'><span style='font-size:9.0pt;color:#333333'>website: </span><span style='font-size:9.0pt;color:#555555'><o:p></o:p></span></p></td><td valign=bottom style='padding:0in 0in 0in 0in'><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'><a href="http://www.tlc-engineers.com">www.tlc-engineers.com</a><o:p></o:p></span></p></td></tr></table><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><a href="http://www.tlc-engineers.com/"><span style='text-decoration:none'><img border=0 width=700 height=49 id="_x0000_i1026" src="cid:image002.gif@01CB97B8.32158980" alt="http://www.tlc-engineers.com/images/TLC_Sig_Loc_Block.gif"></span></a><span style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Kelsey VanTassel [mailto:KVanTassel@sustaineng.com] <br><b>Sent:</b> Thursday, December 09, 2010 3:38 PM<br><b>To:</b> Fleming, Joe; Daniel Knapp; equest-users@lists.onebuilding.org<br><b>Subject:</b> RE: [Equest-users] ERV in Ottawa<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='color:#1F497D'>I find that ERVs use more energy when the Make-up Air Temp Ctrl is specified as “Float”. In other words, there is no temperature control of the air leaving the ERV. For an enthalpy wheel, choose “Modulate HX”. This allows the rotational speed of the wheel to vary in order to maintain a particular leaving air temperature.<o:p></o:p></span></p><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Kelsey Van Tassel</span></b><b><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#000066'><o:p></o:p></span></b></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Mechanical Engineer | <a href="mailto:kvantassel@sustaineng.com">kvantassel@sustaineng.com</a></span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#000066'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>608.836.4488 ext. 20 | Fax: 608.836.4477<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#000066'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Sustainable Engineering Group</span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#000066'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>901 Deming Way, Suite 201<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>Madison, WI 53717<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><a href="http://www.sustaineng.com/">www.sustaineng.com</a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:black'> </span><span style='font-size:12.0pt;font-family:"Times New Roman","serif";color:#000066'><o:p></o:p></span></p></div><p class=MsoNormal><span style='color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] <b>On Behalf Of </b>Fleming, Joe<br><b>Sent:</b> Thursday, December 09, 2010 2:12 PM<br><b>To:</b> Daniel Knapp; equest-users@lists.onebuilding.org<br><b>Subject:</b> Re: [Equest-users] ERV in Ottawa<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoPlainText>I have come across this a lot in eQuest, and the solution for me is usually to only run the ERV in cooling mode, because I am usually in a mostly cooling climate. <o:p></o:p></p><p class=MsoPlainText>I am not sure exactly how eQuest handles the ERV controls under "Operating Mode:", but it does say something in the help file that leads me to believe choosing heat/cool is a bad idea for an operating mode... <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><i>"OA-HEAT/COOL the default for enthalpy ERVs, indicates that the ERV will operate whenever the absolute value of the differential between the outdoor air and the exhaust exceeds the specified differential."<o:p></o:p></i></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><img border=0 width=632 height=130 id="Picture_x0020_1" src="cid:image003.png@01CB97B8.32158980"><o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>The difference between OA cooling only or OA heating only and OA heat/cool is the term "absolute value". If the conditions are such that the absolute value between the exhaust and outdoor airflow is less than 5 degrees the ERV is off. If it is greater than 5 degrees the ERV comes on. <u>So the entire period where you are in cooling mode but it is less than 70 degrees outside, (assuming a 75 degree space temp, abs|69-75| = +6, the ERV is adding to your cooling load and is hurting your cause, because we chose OA heat/cool.<o:p></o:p></u></p><p class=MsoPlainText> <o:p></o:p></p><p class=MsoPlainText>If there were a way in eQuest to use an ERV in heat/cool mode but eliminate the absolute value part and make it +5 for cooling and -5 for heating, instead of Del_T > abs|OA-EA| then that would allow the ERV's to operate perfectly and operate in the same fashion as the standard ERV sequence in the field. <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Does anyone know if this is correct, or if eQuest treats the control sequence different from what is described above?<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Joe Fleming<o:p></o:p></p><p class=MsoPlainText>E.I., LEED AP BD+C, BEMP<o:p></o:p></p><p class=MsoPlainText>Mechanical Engineer I<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>TLC Engineering for Architecture<o:p></o:p></p><p class=MsoPlainText>Your 2030 Challenge Partner<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>800 Fairway Drive, Suite 250<o:p></o:p></p><p class=MsoPlainText>Deerfield Beach, FL 33441-1816<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>phone:Â <o:p></o:p></p><p class=MsoPlainText>954-418-9096<o:p></o:p></p><p class=MsoPlainText>fax:Â <o:p></o:p></p><p class=MsoPlainText>954-418-9296<o:p></o:p></p><p class=MsoPlainText>direct:Â <o:p></o:p></p><p class=MsoPlainText>954-418-4591<o:p></o:p></p><p class=MsoPlainText>website:Â <o:p></o:p></p><p class=MsoPlainText>www.tlc-engineers.com<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>-----Original Message-----<br>From: equest-users-bounces@lists.onebuilding.org [mailto:equest-users-bounces@lists.onebuilding.org] On Behalf Of Daniel Knapp<br>Sent: Thursday, December 09, 2010 12:56 PM<br>To: equest-users@lists.onebuilding.org<br>Subject: [Equest-users] ERV in Ottawa<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Hello,<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I've been trying to understand how ERV works because I am finding the energy savings to be somewhat less than I had expected. Ottawa has a very cold climate in the winter and a warm, humid climate in the summer and I would expect enthalpy wheels to be a very good energy saving strategy. Instead, I am finding that in many cases the building uses more energy and in the best case scenario (OA exhaust DH, mixed air reset, modulate HX) on a VAV system saves only 0.15%. I have built a simple box model with one system in a two-storey office building and tried a number of different control strategies (see attached tables for results). I have tried a VAV and a SZ system. The ERV is able to save marginally more energy in the SZ system, but in neither case are the results what I was expecting.<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>My question is this: are these results to be taken at face value and believed or is there a better way to model ERVs in a Canadian climate? It seems very unlikely to me that ERVs cannot be controlled in such a way as to save significant energy in a climate of extremes. (.inp file attached as well). <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>With thanks and best wishes,<o:p></o:p></p><p class=MsoPlainText>Dan<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>—<o:p></o:p></p><p class=MsoPlainText>Daniel Knapp, PhD, LEED® AP O+M<o:p></o:p></p><p class=MsoPlainText>danielk@arborus.ca<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Arborus Consulting<o:p></o:p></p><p class=MsoPlainText>Energy Strategies for the Built Environment www.arborus.ca<o:p></o:p></p><p class=MsoPlainText>76 Chamberlain Avenue<o:p></o:p></p><p class=MsoPlainText>Ottawa, ON, K1S 1V9<o:p></o:p></p><p class=MsoPlainText>Phone: (613) 234-7178 ext. 113<o:p></o:p></p><p class=MsoPlainText>Fax: (613) 234-0740<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText><o:p> </o:p></p></div></body></html>