I am working on a 5 story hotel in San Jose, California. I'm trying to finalize the Indoor Water Use Reduction Calculator. The water closets (4 types) have identical gpf rates, so I've left them at the default setting of 50% of occupants using each. Likewise, the residential showerheads (3 types) have identical gpm rates, so I've left them at the default setting of 100% of occupants using each.
However, the populations of Private (residential) lavatory faucets, Public lavatory (restroom) faucets, and Kitchen faucets are all different. Do I adjust the percentages based populations of each, or is there a different method. I doubt I leave them all at 100%. Your help is appreciated.
Emily Purcell
Sustainable Design LeadCannonDesign
LEEDuser Expert
371 thumbs up
August 27, 2019 - 12:49 pm
Hi Kyle, I'm working on this for a hotel as well and it is complicated!
I would recommend to start by creating 2 user groups: 1 for guest rooms, 1 for public areas. The guest rooms would include all uses of the private room fixtures by guests. The public group would include uses of public area restrooms by staff and visitors. Then you would set the percent of occupants to 100% *within* each group, since creating the two groups breaks down the occupants by guest/others.
Then, if you have spa/fitness showers or restaurant/retail fixtures, you might want to create an additional group to account for those.
Also, the water closets should be set at 100% each as well. After you complete the "% of males using urinals" field, the form calculates the WC/urinal use ratio automatically.
Kyle G. Pearson
3 thumbs up
August 27, 2019 - 12:53 pm
Excellent answer. I didn't think of that. I was trying to come up with a hybrid model. Your model makes it much simpler. Thanks!
Kyle G. Pearson
3 thumbs up
August 27, 2019 - 1:29 pm
A follow up question. On the general group, I have the full population of employees, and visitors, figuring that everyone will have access to these fixtures. On the Dwelling unit group, I have just the visitors. However, without employees, the calculations end up as zeroes. Any suggestions?
Kyle G. Pearson
3 thumbs up
August 27, 2019 - 1:50 pm
I think I have it worked out. I looked in the instructions, and my dwelling unit group has to have the "visitors" set as "residential" for the calculation to run. I assume I should do this with the first group as well? One concern, my usage has changed from hundreds of thousands of gallons annually, to millions. I guess that makes sense for a hotel.
Emily Purcell
Sustainable Design LeadCannonDesign
LEEDuser Expert
371 thumbs up
August 27, 2019 - 3:29 pm
Yeah, that makes sense because a "visitor" has less than 1 use of the WC/lavatory and 0 shower uses per day, while a resident has 5 WC/lav uses and 1 shower. So chagnign that will drastically change your total. But if you have efficient guest room fixtures, it will probably increase your percent reduction!
Kyle G. Pearson
3 thumbs up
August 27, 2019 - 3:54 pm
Sounds great. Thanks! One last question, I have 3 different showerheads with identical gpm flow. One is for my accessible units (handheld), and the others are used in different styles of rooms. Do I leave the usage for each at 100%, or adjust them based on actual numbers in the project?
Emily Purcell
Sustainable Design LeadCannonDesign
LEEDuser Expert
371 thumbs up
August 27, 2019 - 4:01 pm
Since the flow rate is identical, just list them all as a single "shower" line with 100% of occupants in the calculator, and add a note in the form or as an upload that you've consolidated them.
Kyle G. Pearson
3 thumbs up
August 27, 2019 - 4:14 pm
Perfect. Can do. Thanks for the guidance!
F. Borja López Calle
ConsultantMinsait
2 thumbs up
January 13, 2022 - 2:24 am
Hello.
We are working on a hotel that includes a restaurant. At Indoor Water Use Reduction Calculator we have created different groups as recommended by Emily Purcell: guests, spa, toilets for public areas, workers' locker room and kitchen.
What use should I put for kitchen faucets? Only the 10 kitchen workers or should I also include the restaurant visitors?
Thanks
Carolyn Risley
Mechanical EngineerDillon Consulting Limited
1 thumbs up
January 13, 2022 - 1:28 pm
Only the kitchen workers would have access to the kitchen faucets, so the restaurant visitors may be excluded. You may also want to consider which kitchen sinks could be classified as "process use".
ANCHAL AGARWAL
May 18, 2022 - 9:44 am
Hi
I am also working on a hotel project. Wanted to doubel check, if population considered for Hotel rooms will be considered as visitors for Hotel common facilities like restaurants, spa and fitness center. How many occupancy types should be considered for a hotel project?
In my project following are the numbers:
Hotel Accomodation (Keys) - 1bhk - 54 Keys - 2/Key - total 108 occupants /2bhk - 9 Keys - 4/Key - total 36 occupants / 3bhk - 1 Keys - 6/Key - total 6 occupants
Total Hotel Accomodation occupants - 150 occupants
Now considereing that the same population will be using common amenities in the hotel (The project is located in a schecluded area away from city area), should we considered 150 occupants as visitors for common area fixtures as well or should there be any diversity?
According to my understanding:
1) FTE of Hotel Accomodation - 150 (Using private fixtures)
2) FTE of staff - 100 (Using Public fixtures)
3) FTE of Hotel visitors using common area - (150 *4) /8 (Using Public fixtures) We considering that hotel occupants will be in common areas for 4 hours and might use the common area toilets.