We have a product data sheet for a dual flush toilet that states 6L/3L with an effective flush volume of 4L. The Indoor Water Use calculator has an internal calculation for dual flush toilets...

On the Reduction Calculation spreadsheet, how should the "Percent of Occupants" be filled out for kitchen sinks or urinals? The spreadsheet indicates that the percentage should be 100% if...

Let's talk about watersense and local equivalents. 

What makes a local standard equivalent? If we can meet or beat the flow rates, is there another requirement or feature that we need to...

Hi,

LEED V4 prerequisite for prerinse spray valves is 1,3 gpm (4,9 liters per minute) but I haven't found any products with such low flow rate sold in Finland. Some manufacturers have...

In prior versions of LEED, sensor faucets were given a credit for reducing hand washing duration from 15 seconds to 12 seconds. v4 describes calculations for a metered faucet (assumed to...

Can an open-loop ground source supply/injection well heat pump system be used for the heating and cooling system on a LEED v4 project?  Does the WE Prerequisite: Indoor Water Use Reduction Table...

Hi all,
The prerequisite lists the baseline flow rates at 60psi (415 kPa). Does this mean that the proposed flow rate must also be at 60psi? Are we able to use the flow rate at the actual...

Jens Apel LEEDuser Basic Member 134 thumbs up October 19, 2017- 1:59 am In Europe, many manufacturers do not have compliant faucets, and test pressure is different to LEED requirements. What we normally suggest is the use of pressure independent aerators that just replace the standard aerators in the faucets. They work with a lot of faucets, should be pretty low cost and allow the architects to select faucets from a larger variety of manufacturers and designs. I am unsure if forum rules prohibit promotion of specific manufacturers. In past projects we used products from www.neoperl.com, not sure...

Hello everyone, 

I would appreciate someone to suggest me on this topic.

Since Duration-based savings from autocontrol faucets with automatic fixture sensors or metering controls...

Has anyone worked with low flow aerators instead of metering since metering is no longer allowed for v4? I have a project where I previously did my calculations using 0.1 gpc for 12 seconds for a...