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Hi, I need help finding litrature and advise on design of a central exhaust system from large public restrooms. Each facility has about 10 sanitary fixtures. 75 cfm per fixture is my target. Restroom is on first floor and exhaust must be thru roof on 3rd floor. Would the fan go on the roof or...

On a project I want to use T-stat with occupancy sensor combo. Where can I look for tech data on them? Who are the players in this market? thanks,

Can someone point me to a table for required insulation thickness around chill water supply and return pipes. Thanks,

Can a 200 amp distribution panel be located in a boiler room? The room will not get hotter than max 120-deg F. thanks,

On a large old central AHU (30000 cfm), the maintenance wants to increase the airflow. I think that the chill water coil should have been designed for a specific airflow and we can not just increase the fan cfm. Please comment. Thanks

To cool off a warm elevator hoist way (3 story tall),we are going to introduce conditioned air at 75 deg. Is it better to extract air out from the top by an exhaust fan, or, force air in at the bottom with a fan? Should the piston effect of elevator travel be considered? Thanks,

Hi, What are some common situations when a duct heater is used and why. Doesn't the supply air provide required heating? Thanks,