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Percent of Occupants

NC-v4 WEp2: Indoor water use reduction
posted by Amy Ruffino on Jun 1, 2016, 4:12 pm

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...

Last reply: Emily Purcell, May 14, 2018, 5:17 pm

Watersense- Local Equivalents?

NC-v4 WEp2: Indoor water use reduction
posted by Leanne Conrad on Apr 13, 2018, 12:38 pm

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...

Last reply: emily reese moody, Apr 24, 2018, 7:18 pm

Prerinse spray valves in Europe

NC-v4 WEp2: Indoor water use reduction
posted by Antti Karppinen on Mar 27, 2018, 9:26 am

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...

Last reply: Jens Apel, Apr 9, 2018, 2:24 am

Sensor Faucets

NC-v4 WEp2: Indoor water use reduction
posted by Jennifer Rennick on Feb 27, 2018, 1:05 pm

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...

Last reply: Nathan Gauthier, Mar 6, 2018, 4:31 pm

Open-Loop Heat Pump System/Process Water Use

NC-v4 WEp2: Indoor water use reduction
posted by Kara Rousselle on Feb 16, 2018, 6:00 pm

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...

Last reply: emily reese moody, Feb 27, 2018, 2:00 pm

Which flow rates to use?

NC-v4 WEp2: Indoor water use reduction
posted by Nate Tsang on Oct 19, 2015, 2:16 pm

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...

Last reply: Trista Brown, Jan 9, 2018, 9:20 pm

LEED Compliant Faucets

NC-v4 WEp2: Indoor water use reduction
posted by Ann E on Oct 19, 2017, 1:49 am

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...

Last reply: Ann E, Nov 28, 2017, 9:39 pm

Specifying the correct faucet system for an office facility

NC-v4 WEp2: Indoor water use reduction
posted by Guillermo Brunzini on Nov 8, 2017, 3:36 pm

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...

Last reply: Nathan Gauthier, Nov 9, 2017, 4:05 pm

Low flow aerators to account for reductions instead of metering

NC-v4 WEp2: Indoor water use reduction
posted by S. Sachs on Feb 14, 2017, 2:58 pm

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...

Last reply: Katie Fluence, Nov 3, 2017, 2:04 pm

Watersense Label

NC-v4 WEp2: Indoor water use reduction
posted by Indochine Engineering VN on Oct 30, 2017, 6:17 am

Hi LEED expert,

My project is Vietnam and there is no Watersense labelled fixtures in my country. Can I just select the fixtures based on the flow rate on their catalog, datasheet for this...

Last reply: Trista Brown, Nov 1, 2017, 7:23 pm