For a general radiography suit in a hospital, how do we guess the cooling load of the X-ray machine. The input is 150 KVA, output 80 kW, What's the percentage is appropriate for calculation?
On the ASHRAE handbook, the table shows average load corresponding to nameplate load. It does not make...
I saw some hospital project using VAV to control temperature, I am not sure if it is allowed by code and how to guarantee the pressure relationship between different zones if so.
THX
Do we need to put fire extinghuishers in crawl space according to NFPA? it is only about 1 meter high inside. I think it is impossible for people running to get fire extinguisher in emergency.
if there are lots of VAV box at the supply terminal, how to design the return duct? There will be a return fan because return ducts reach to each room.
When select return grille, what's the rule to follow.
Someone says the speed should be kept under 500 fpm. While according to some product catalogue, if using the lowest NC level to select, the speed can be 800 fpm or even higher.
I am a little confused. The reason to keep the speed is to...
Normally for apartment building, should we select water tank for a domestic water heater? (for example there are 70 suits inside)
As I read in Ashrae handbook, 2 data are used to select heater and tank, recovery rate GPH and size of storage capacity Galon.
While my boss always selects a heater...
Normally for apartment building, should we select water tank for a domestic water heater? (for example there are 70 suits inside)
As I read in Ashrae handbook, 2 data are used to select heater and tank, recovery rate GPH and size of storage capacity Galon.
While my boss always selects a heater...
Normally we put all duct in bulkhead along the wall in apartment building. I know it looks ugly if the ceiling is not high, but it will comply with the fire requirement.
While sometimes the owner request to put duct in the joist space. My boss seems not willing but accepts whatever. I want to...
where can we use direc fired make up air unit? Somebody told me it is for any ventilation purpose as long as no one sleep in the conditioned area, such as restaurant and office. Direct fired unit makes me a little uneasy, is it really safe for people inside?
Normally when should we consider to provide pressurization for industrial buildings and how to decide the Min outside air? I am in Canada. I can not find this information in local building code.
