I suggest the infrastructure. A high rise apartment block will have much better plumbing and capacity as it is designed to handle every apartment having at least one bathroom and toilet. And realistic expectations would be many of those are in use at the same time as people get ready around the same time in the morning for work.
An office block has to fit minimum requirements so that is enough toilets per floor to meet regulations and unlikely many or any showers / baths. And not every bathroom is going to be in use at the same time - there will peak times of course but not every employee on the toilet at the same time.
When building an office block they’re not going to have anywhere near the same infrastructure as an apartment block. It’s one of the reasons it’s expensive to convert an office block to apartments.
I suggest the infrastructure. A high rise apartment block will have much better plumbing and capacity as it is designed to handle every apartment having at least one bathroom and toilet. And realistic expectations would be many of those are in use at the same time as people get ready around the same time in the morning for work.
An office block has to fit minimum requirements so that is enough toilets per floor to meet regulations and unlikely many or any showers / baths. And not every bathroom is going to be in use at the same time - there will peak times of course but not every employee on the toilet at the same time.
When building an office block they’re not going to have anywhere near the same infrastructure as an apartment block. It’s one of the reasons it’s expensive to convert an office block to apartments.
Best case is probably to design as if all objects of interest do a thing (e.g. all toilets, faucets, etc. flushed at once)