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Is there a room volume cut off that you use for clean agent space to make sure that your system will pass the room integrity fan test?
As an extreme example, a 50,000 sf space would probably be better for something like a double interlock preaction system since it would be difficult to make sure that the space is of tight enough construction to hold the clean agent (there will inherently be some leaks in construction despite doing all the recommended practices of gasketing, door threshold blocking, etc). Thanks in advance! Sent in anonymously for discussion. Click Title to View | Submit Your Question | Subscribe
7 Comments
Glenn Berger
12/14/2023 08:04:50 am
I have not seen any numbers to date. For larger installations, some non-standard techniques are required (i.e, locating cylinders in multiple locations, multiple levels of nozzles, etc.).
Eddie B
12/14/2023 08:24:21 am
May I ask what you are protecting in a 50,000 sf enclosure? Just asking but does all the material in the enclosure need clean agent protection?
Tyler Dallas
12/14/2023 08:41:03 am
In my experience, it is easier to get larger rooms to pass the room integrity test because the allowable leakage is much higher. Small rooms have such a low allowable leakage that is very difficult to track down the source of the leak. 12/14/2023 08:48:23 am
In general, the larger the room is, the easier it is to achieve passing door-fan test results, thus there is no limit. For clarity's sake the smaller the room is, the harder it is to obtain passing results. Generally under 2,500 cubic feet a 10-minute hold time will not be obtained. It comes down to the leakage-to-volume ratio. If the volume is larger the leaks from the room that are fixed (doors usually) affect the room less. 12/26/2023 09:20:10 am
There is no limit to room volume. However, keep in mind that there are limits to maximum nozzle protected height, which varies by manufacturer and extinguishing agent type. It is usually approximately 16 to 18 feet maximum height. In the event of ceilings that exceed the height limit, you will need to have multiple levels of nozzles.
Annabelle
8/15/2024 03:36:26 pm
does it have a minimun room volume requirement?
sean
12/31/2023 06:44:55 pm
I think there is no limit other than feasibility and cost. Leave a Reply. |
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