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https://www.cedengineering.com/userfiles/Stairwell%20Pressurization%20Systems.pdf

i think the ashrae tables have too many mistakes and typos in them to be used. smacna is better.

no you cant do that, your unit likely says this in its O&M. the gas code also does not allow it. https://www.engineeredair.com/manuals/he-de https://www.priceindustries.com/content/uploads/assets/literature/manuals/section%20a/aw-d-direct-fired-make-up-air-unit-manual-english.pdf balancing...

200 psi rate asme class VIII tank with indirect heat exchanger tube bundle in the tank. want a PRV set at 200psi. problem most P&T prv's go to 150 due to IPC 504.5. as such this prv application is somewhat uncommon. all the same i see no issue with calling the vessel a pressure vessel and...

count it towards the drain down rate and call it part of the design.

so the international code (504.4) says you cant be more than 150 psi. got any good exceptions, ie can i call this water heater not a water heater and instead a pressure vessel. the tank is rated to 200psi but due to the imc getting a 200psi relief valve seems likely to be impossible. is...

what your saying didnt meet code in 1950 either.

you want as much exhaust as you can get. 200 is too little. broan allure qs2, basically the same fan that was used in 1980. http://media.datatail.com/docs/specs/45335_en.pdf ranges produces a lot of heat and fumes, you don't want either in your building. code minimum rate i think is like...

this topic has always bugged me because some firms think "we size at 0.08 so we are progressive/efficient blah blah" q=1.08xcfmxdt, airflow is one of the three variables. of the three i would argue the load is the most conservative because it increases equipment and duct size. dt is the...

I think he should have been warned to not use the name, but his claims should not be dismissed. the fact is bad design of lights costs many lives. putting cameras in place gives this city revenue but actually discourages fixing the problem, costing more lives. the city and its engineering...