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Hello everyone, I'm sorry for doing this but I have a really novice question. I recently moved from a cooling only climate location to the US. Now I'm working with both cooling and heating systems. I have a doubt when calculating fan external static pressure for dual duct systems. Do I assume...

Greetings colleagues, I have a room that will store chemicals in plastic bins in racks of two rows. The room has ceiling sprinkler but we will be installing in rack sprinklers in both rows. For the hydraulic calculation I'm considering 7 active sprinklers per level (14 total) plus a hose demand...

Greetings everyone, I'm doing a risk assessment on a new LPG pipe. I've been looking at NFPA 58, the International Fuel Gas Code, and FM Global Datasheets and cannot find a required minimum clearance for above ground piping from equipment that does not have an open flame. The new pipe is going...

Greetings everyone, I know that ASHRAE Standard 170 dictates the ventilation and combination ACH for different type of rooms in healthcare facilities. I was wondering is there a way to reduce the combination ACH if the ventilation ACH are increased? I mean, if the room requires 20 combination...

What do you guys think of this engine? (Ignoring the SEC cease and desist)

Greetings, I run the energy programs for a company and recently one company came to us trying to sell us a "solar assisted" air conditioning system. http://www.solarcool.com/Products/Commercial.aspx I know that Lennox has solar assisted A/C units but the solar panels are used for electricity...

Greetings everyone, I am designing a pretty straightforward manual low expansion foam system for fuel storage tanks. According to calculations I need approximately 12,000 gal. of foam concentrate to comply with NFPA 11 requirements. The client is suggesting that the foam concentrate line runs...

Greetings everyone. I'm new at the fire protection design world so I have a few basic questions still unanswered, so please bear with me. I have a small medical office (950 sq. ft.)with a few small storage areas. The biggest one measures 17 sq. ft. I also have a janitor closet and a hazardous...

Hello, I have a question regarding smoke management. I have an 11 story medical offices building with a big atrium right in the middle. The original mechanical plans date from 1980 and had a smoke control system that was never installed. The building executive board wants to install the system...

Greetings, I have a three story covered mall with a combined standpipe system. It's in Puerto Rico so the governing codes are NFPA and UBC with the approval of the AHJ. As far as I know, the building should be sprinklered throughout, yet the unoccupied tenant spaces are not. They were left with...

Greetings, I have a three story covered mall with a combined standpipe system. It's in Puerto Rico so the governing codes are NFPA and UBC with the approval of the AHJ. As far as I know, the building should be sprinklered throughout, yet the unoccupied tenant spaces are not. They were left with...