I have a project and there is a existing make up air unit with 4000CFM capacity. But according to a new design, we are short of 1500 CFM.
Should I replace the existing unit with a new make up air unit?
or add a new make up air unit?
Is there a third way to do?
btw, I design with 80% capactiy...
let me try it again, there is an existing toilet with a window. Is a exhaust fan required if there is a window?
the total area of the building is 800 m^2. Therefore, it is an application of residential building.
if there is a window in the toilet, it is not necessary to have an exhaust fan?Is there any code saying that?
I checked the Ashrae 62.1. it only says the minimum exhaust rate.
Thanks
Hi,
Is direct gas fired makeup air unit allowed in the indoor ceiling space for commercial kitchen application?
Where can I find the code regarding to this?
Thanks
I am currently doing an government project and they are asking for the requirement for CSA standard Z204-94, guideline for managing indoor air quality in office building.
Is there anyway that I can find online and read it?
Thanks
I have a project, there are 2 hoods exhaust around 3000 cfm air and I have to bring heated fresh air. but the gas landloard supplied is just enough for other service usage. I tried electrical heater. but that heater must to have around 75 KW power. that is a very big unit. What should I do in...
you have to bring 1600 cfm (80% of exhuast air) make up air indoor. Therefore, u need a make up air unit and up blast exhaust fan which are all on the roof. you need an A/C unit. in total, you need 3 openings for the roof.
if your unit is over 5 tons, you need an economizer for energy efficiency.
hi
I have currently doing a project for a small restaurant. I have a regular dishwasher machine and sink. Because the grease trap is on the floor surface, I have to use a pump to pump all the water to the grease trap. What size of pump do I need? the sanitary pipe is 2".
I have had this problem not just once.
for restaurant project, if the grease interceptor is on the floor surface,then my sanitary pipes connecting the interceptor have to be above the floor. But if I have hood far away from the grease interceptor, how I can avoid this problem??
I have a supply duct which is on the basement and it serves 3 rooms above the basements. all rooms have opening on the floor so that the duct can go through. I have to supply one room for 50 CFM, one 75 CFM and the last one 300 CFM. If I use 0.08 in. of water per 100 feet of friction loss. What...
I am new here. I am currently distribute ducts from a roof top unit. I am told to add a 1" insulation from the output of the roof top unit in a distance of 25'. I donot know why it should be 25'. what should I do if my main duct are less than 25'???
