Recent content by fineartsnyc

Initially the design was to equal the fresh air intake and toilet exhaust, since the toilet exhaust fan energize by light switch therefore the fresh air reduced to 160 cfm FAI to each duplex condominium and 100 cfm FAI for the single unit. yes the owner concern about the condominium maintenance...

Thanks Waramanga, since the toilet exhaust fan is not continuously we cant use ERV. Also the 100% outside air unit from Mitsubishi is 1200 cfm, therefore I cant use it. I'm thinking of using a small electric duct heater with inline fan to maintain the duct heater velocity in each fresh air...

Thanks. No we can't use a common hvac unit however the ductwork can be shared. We have to use a separate unit since the unit owner has to pay the electric bills and maintenance.

i don't like the idea of using a dedicated outside air unit for just 100 cfm. is there any other solution?

since the toilet exhaust fan is not continuously we cant use ERV. Also its only 100 cfm O/A required.

in fact I'm using VRF system (Mitsubishi system) . 95 DB, 74 WB summer condition and 15 F winter Temp. 20 cfm/person X 5 = 100 cfm min. outside air.

Hi all, I’m working on HVAC system for luxury residential building. Unit #1 two floors. Four bathrooms 75 cfm exhaust each. Total exhaust is 300 cfm. Unit# 2 one floor. Two bathrooms 75 cfm exhaust each. Total exhaust is 150 cfm Unit#3 one floor. Two bathrooms 75 cfm exhaust each. Total...

Per day means 24 hours of continuous fermentation.  > 95% of the CO2 produced during fermentation is released in the first 4 days.

456.3587 Total pounds of co2 released per day at full capacity. please help how many Air changer per hour required to be exhausted.

sorry. It's a Brewery (production of beer)

The Make-up air is on the roof.

Thanks for your answer. The fresh air from the ERV is connected to the return duct to each air handler. 5 floors + basement+ cellar. it's 1 family house 6 ppls (residential building). the exhaust fan works with light its not constantly. I believe its a control issue or when the ERV will work...

Thanks Herrkaleun, yes all bathrooms on the same exhaust fan 700 cfm exhaust and 300 cfm fresh air to air handler. the ERV is not working yet. I believe its in the bypass mode. its a new construction and well insulated. the problem occur when the thermostat set for 71 F. Could it be a control...

Do you think 0.3 ACH is enough? The fermentation process produces a large amount of CO2.

Thank you Drazen. the project located in NYC. the floor area is 5600 SF. i'm using 12 ACH. 1- The heated supply air would be from One rooftop gas fired make up air with VFD and co2 sensor 2- The exhaust thru 3 sidewall propeller fan.