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I believe the power supply must consider the power consume of other devices attached to the computer later, such as external hard drivers ( depends on how many usb ports ), it makes sense the total power supply is much larger than the data from ashrae. If in the real situlation there is not much...

For a 2 story and 12 meter high atrium in a health care facility, should we put smoke exhaust fan on top?

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

In canada

Then How about fire extinguisher? I can not see the point of using it if the height of crawl space is low. But I have not found clear statement of "no need"

The building is wood construction and is protected by sprinkler system even in crawl space. Office area on main floor and residential on 2nd and 3rd floor. But there is nothing in crawl space.

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.

we should use pressure independent VAV. The system is normal low speed one. To keep air volume accurate is important. I am not sure if it can control properly when static pressure is low

We used to connect VAV to medium velocity system. Can it be used in normal low speed duct system?

For the convector and radiant panel, if the mean media temperature is the same, is the output of water and 50% glycol same?

Why pirate copy? My company is a LEED member, we even have an Acrobat copy of the reference guide on network. (LEED canada does not accept personal membership) Is it not the whole part? It seems that experience help a lot with the test. How about other's recent experience with the test. I have...

How much will LEED workshop help the test? Any big difference between Canadian and US test?

While, when the VAVs reduce the S/A volume, how will the supply and return fans correspond?

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...

Be aware, in cold weather, blow thru will provide more air flow due to change of density. 2 senior guys were beaten by by me on this topic, then I was fired.

Under which condition should the wall of mechanical room be fire rated? I heard somebody said the building is bigger than 400 m2. Right?

The electrical guys require explosion proof (or spark resistant) exhaust fan, what model is commonly used?

How to decide the exhaust air flow for a paint booth hood? What kind of exhaust fan is typically used? The ASHRAE mentions the ACGIH. What's that?