Tenant Neutral Calculations

Hello Nathan,

No, with the “Tenant Neutral” option the total water usage amount from future tenant fixtures is not excluded from water calculations. For spaces where you anticipate that tenants will install additional water fixtures and fittings, you will need to document the design case using the LEED 2009 baseline water usage rates.

For spaces where the LEED Core & Shell project scope includes the installation of water fixtures and fittings (the Owner’s scope of work is known), use actual water usage rates to document the design case. Therefore, yes, the fixtures in the Owner work scope will have to achieve a greater reduction in order to make up for the "lack of reduction" from the tenant neutral/baseline fixtures.

In this case you will need to include two different usage groups, one for the future tenant group and another for the Owner installed fixtures.

Carlie - how would you separate the FTE's into these 2 different usage groups?

Hi Brittany -
Are you asking how to separate them in the WEp1 Form calculations,..or how to determine which FTEs utilize the fixtures that are known vs. the FTEs that will utilize the future tenant fixtures that are unknown?

Sorry - how to determine which FTEs utilize the fixtures that are known vs. the FTEs that will utilize the future tenant fixtures that are unknown.

This will vary depending on the project scope, and there is no specific methodology so the project team will have to make some reasonable assumptions about how to separate the FTEs fixture usage. If you used the default CS occupancy and the known fixtures vs. future tenant fixtures are easily distinguished by floor, then you could associate the appropriate number of FTEs by floor. In any case, I would definitely include a narrative describing how you determined which FTEs utilize the fixtures that are known, vs. the FTEs that will utilize the future tenant fixtures that are unknown.

Thank you Carlie!

Dear Carlie,

We have a situation for a LEED-CS project, the building is entirely especulative office building.

The developer will provide all plumbing fixtures, that is to say WC, urinals, showers and lavatory faucets at every level of the building.

However, as per the developer requirements, preparations were done in case a tenant desires to install a plumbing fixture inside their tenant space. Which is why we provide on the tenant design and construction guidelines some samples of low consumption fixtures.

Out WEp2 is now pending and the reviewer is requesting to use the tenant work compliance path.

We cannot anticipated how many tenants could buy themselves extra plubimg fixtures for their office space so we are not sure how to handle this situation. Some may use the ones provided by the CS building, some other may want to have dedicated restrooms inside their space (which is typical for CEOS or directors in AAA buildings).

¿Should we asume some percentage of tenants will provide inside their space some plumbing fixtures?

Any comment would be really appreciated.

We do not want to use the tenant neutral option because it will lower our savings when we don't even know how many tenants will provide plumbing fixtures.

Michael E. Edmonds-Bauer,

For your Project case calculations, may I ask the assumed percentage of tenants inside their space that provided some plumbing fixtures?

We have a similar case, we are using the tenant neutral option and we are not sure the percentage of tenants to be assumed.

I have question regarding Tenant Neutral Calculations. The project is considering anticipated tenant work fixtures at baseline flow rates to perform the WEp1 & WEc3 calculations. Is the project required to include the baseline fixture flush & flow rates for plumbing fixtures in the Tenant Sales/Lease Agreements ?

I would appreciate any guidance anyone can provide.

Thanks.