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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Hello <o:p></o:p></p><p class=MsoNormal>We got a condo project, with water to water HP providing cooling and heating for central make up air unit, and hot water from boiler and a second heat resource for this make up unit. <o:p></o:p></p><p class=MsoNormal>At zone level, there is ERV providing fresh air to suites. And the HPs in suites provide additional heating and cooling.<o:p></o:p></p><p class=MsoNormal>In EE4 there is no option to set water to water HP for make up unit. So we are thinking three options<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>1.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Put heating capacity of MAU to zone, and break down all the heating from water to water HP and boiler to zone level, combined with HP in suites<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>2.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Put boiler as predominate heating resource for MAU, and break down water to water HP to zone level with HPs in suites. Then the setting of supply air temperature would be very tricky. <o:p></o:p></p><p class=MsoListParagraph style='text-indent:-18.0pt;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>3.<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Add up total capacity of boiler and water to water HP as one hot water heat source. This option ignores the HP heating<o:p></o:p></p><p class=MsoNormal>Which one option is more reasonable? Or there is other better way to model this system?<o:p></o:p></p><p class=MsoNormal>Thank you,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'>Xiangjin Yang </span></b><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'>Ph.D. </span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'>Junior Mechanical Designer </span></i><span style='font-size:9.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><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.mcw.com" title="Click here to visit www.mcw.com"><b><i><span style='color:green;text-decoration:none'>MCW Consultants Ltd. </span></i></b></a><o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'>156 Front Street West Suite 600 <br>Toronto, ON M5J 2L6 <br>Phone 416-598-2920 <br>Fax 416-598-5394 </span></i><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> <o:p></o:p></span></p><p class=MsoNormal><i><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'>This e-mail may be privileged and confidential. Any unauthorized use is strictly prohibited. If you received this e-mail in error, please contact the sender directly. </span></i><span style='font-size:8.0pt;font-family:"Arial","sans-serif";color:#4D4D4D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:18.0pt;font-family:Webdings;color:green'>P</span><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'> </span><span style='font-size:10.0pt;font-family:"Arial Rounded MT Bold","sans-serif";color:green'>Please consider the environment before printing this e-mail </span><o:p></o:p></p></div></body></html>