<html><head><style type="text/css"><!-- DIV {margin:0px;} --></style></head><body><div style="font-family:times new roman,new york,times,serif;font-size:12pt;color:#000000;"><div>Dear eQuesters:<br><br>I am having some problems with the attached model and would appreciate any feedback. Perhaps this design can be accurately modeled by eQuest?<br><br>The design is a research lab portion of an existing building. Just 1/4 of the first floor is being renovated.<br><br>The main problem that I am experiencing involves the MAU that conditions the core area and that provides ventilation air to the reset of the spaces. A fan powered ERV is used for heat recovery.<br><br>All the areas with the exception of the corridor are conditioned by a VRV heat pump system modeled as a PVVT with variable speed compressor. There is existing hot water fin tube radiation on the exterior walls with the exception of the northeast and southeast walls that do
not have any curtain wall.<br><br>The 5 labs and 10 specialty labs located within the main labs are on the east and south sides. 8 ACH is required. The 5 labs have a constant fume hood exhaust flow of 600 CFM each.<br><br>The offices on the north and west sides as well as the corridor use 20 CFM per person for ventilation. The large lecture room on the south side uses 15 CFM per person. This air is exhausted through the ERV.<br><br>The MAU supplies 7,500 CFM. The ERV exhausts 4,300 CFM. The reset of the MAU supply air is exhausted through the fume hoods.<br><br>eQuest does not seem to correctly calculate the exhaust air to the ERV taking into account the lab exhaust and the ventilation air supplied to the office areas.<br><br>I am getting some errors that I cannot eliminate and would greatly appreciate any help.<br><br>Thank you,<br>Paul Diglio<br></div>
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