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IMC 2015 is the applicable code for the location. Chapter 11 may not cover exactly the same scenario (these are portable canisters, not a permanent system), however the hazards appear to be similar. I'm thinking follow Ch. 11 and try and get concurrence from the AHJ to that approach.

GT-EGR, There won't be any operating chiller or refrigeration machines. Just canisters or refrigerant and chillers which are being serviced and recharged. Refrigerants are primarily R-22 and R-410.

I need to specify an exhaust system, with refrigerant monitoring, for a maintenance shop where workers will be storing refrigerant canisters and recharging equipment. Does anyone know which code(s) would govern this situation? I'm thinking I need to use ASHRAE 15, and base calculations on the...

Compositepro, Thank you, I'm tracking the physics behind the higher efficiencies of condensing boilers. What I'm asking is if there is any difference in efficiency between a typical "Condensing Boiler" (i.e a boiler designed to handle operating at condensing temperatures) and a "Non-condensing"...

Anyone have real world observations on the efficiency of condensing boilers while operating in non-condensing mode? Are they as/or more efficient than a non-condensing boiler? Or will a non-condensing boiler outperform at higher temps? From what I can find, most people assume the efficiency...

Thanks for all the responses. I visited the site last week and was able to talk with the maintenance staff for awhile. It turns out the existing units were meeting demand just fine for about a year after installation, but could not keep up after that. I also spot checked the designers sizing, it...

I'm reviewing a design for the replacement of split system AC units in a server room (with outdoor condenser). The existing system is residential AC units, which are unable to meet demand during hot days. The proposed design is to replace the existing residential units with Data Aire mini-plus...