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NC-2009 WEp1:Water Use Reduction—20% Reduction

Daily uses public vs. private in hotel

I am working on a hotel NC certification. It is clear that the guests count as residents with 5 uses per day for toilets and faucets. But there is a public toilet block next to the breakfast room. Has anyone ever tried to split the 5 daily guest uses between hotel room and public toilet? It is difficult to tell an exact number, but at least some of the guests will use the toilet at the breakfast room instead of their guest room toilet. Any ideas?

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Fri, 02/21/2014 - 12:39

For a hotel (just NC certified) I used for guests 5 uses per day (residential use), for employers 3 uses (FTE use). Guests that will use the toilet at the breakfast room will not use their guest room toilet, the total uses amount is the same.

Mon, 02/24/2014 - 14:49

Yes, this would be my approach too. But as there may be urinals and autocontrol faucets in the public restroom it may be easier to save water here instead of e.g. with the guest room showers (comfort issue). But then the split of guest uses between hotel room and public restroom is important. Does anyone have a standard approach or hints for splitting residential / hotel use in private and public?

Mon, 02/24/2014 - 15:51

I don't know about a standard approach, but I think it would be less than half the hotel guests using the breakfast room toilet instead of their hotel room toilet for one use per day. Keep in mind that the breakfast room toilet will be a public lavatory with a much lower max. flow rate and much lower overall water use compared to the showers. So you might want to run some calcs both ways to see if it's even worth pursuing this route (start with simply 4.5 uses in the hotel room and 0.5 uses in the breakfast room restroom, which would be more public restroom uses than would realistically be used) to see if it's even worth breaking it down to the public restroom. The 2.2 gpm residential lav faucet can easily be reduced to 1.5 gpm (or even 1.0 gpm with the right type of aerator), and the run time will be twice as long as the 0.5 gpm max flow rate for the public lav faucet. The total gallons of water for the public lav likely won't even really make a dent compared to the showers and other residential water usage...

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