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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am wondering what the best method is to simulate conditioning high bay spaces in an automotive repair facility with a unit heater that heats incoming outside air pulled through a louver by an exhaust fan on the opposite side of the room. The ventilation air is pushed down to the occupant level by ceiling fans that I will have to account for separately due to their impact on destratification. The infrared heaters will provide the heating to the occupants, equipment, and surfaces that is not provided by the unit heaters.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I imagine that I could select the heating and ventilation system and tack on a (wall convector) in the auxiliary heating coil/ fan control methods section under advanced options. I hesitate to model the unit heaters as a DOAS since that would require design data on a minimum temp supply which is not in keeping with their design. All units require combustion air.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Really what it comes down to is that the only outside air passing through the system (unit heaters) is the combustion air. The ventilation air is pulled across the space through a louver that could be modeled as infiltration I guess (opening.) I can’t wait to explain that to LEED. The Infrared heaters only heat surfaces, people and equipment through radiation and I have seen this implemented via means similar to miscellaneous loads and even lights in the rooms served that have a 100% radiant fraction and are attached to a gas meter. I only have an inkling about tracking this operation to simulate its control through a thermostat via the schedule though.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Any help is greatly appreciated.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thanks,<o:p></o:p></p><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Nic Fonner | EMIT <br></span></b><span style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Energy Modeling Group<br><b><span style='color:#0D4BA0'>Henneman </span></b><span style='color:#0D4BA0'>Engineering, Inc.</span> | energy. focused.<br></span><span style='font-size:9.0pt;font-family:"Arial","sans-serif"'>1605 South State Street, Champaign, IL 61820<br>V 217.359.1514 | F 217.359.9354 | C<br><a href="http://www.henneman.com/"><span style='color:windowtext;text-decoration:none'>www.henneman.com</span></a> | <u><span style='color:blue'><a href="mailto:nfonner@henneman.com"><span style='color:blue'>nfonner@henneman.com</span></a></span></u><o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>