1. Water Saving Technologies for Buildings August 10, 2015

2. Mike Hess, PE, LEED AP US Green Building Council − National Board of Directors – 2007-2010 − Florida & Caribbean Regional Representative – 2006-2010 − Central Florida Past President Principal at exp − Earth Group − Commissioning Department

3. Agenda Water Saving Technologies − Outside the Building − Inside the Building Water Re-use Technologies Discovery Techcenter II Case Study

4. WATER SAVING TECHNOLOGIES

5. Water Saving Technologies Outside the Building Can typically reduce irrigation by more than 50% with a combination of landscape and irrigation strategies − Landscaping − Native and drought tolerant plants − Minimize turf grass − Group plants based on water needs − Avoid thin strips of turf grass − Diversify species − Landscaping − Native and drought tolerant plants − Minimize turf grass − Group plants based on water needs − Avoid thin strips of turf grass − Diversify species

6. Water Saving Technologies Outside the Building Can typically reduce irrigation by more than 50% with a combination of landscape and irrigation strategies − Irrigation − Different zones for shaded areas − Separate water meter for leak detection − Drip where possible − Smart irrigation controls with rain sensors − Irrigation − Different zones for shaded areas − Separate water meter for leak detection − Drip where possible − Smart irrigation controls with rain sensors

7. Water Saving Technologies Inside the Building Can typically reduce water by 30% - 40% with a combination of technologies − Water saving appliances − Faucet controls − Ultra low flow lavatory sinks - 0.35 Gallons per Minute (GPM) or less − Low flow kitchen and break room sinks – 1.5 GPM or less − Low flow showers – 1.8 GPM or less − Water saving appliances − Faucet controls − Ultra low flow lavatory sinks - 0.35 Gallons per Minute (GPM) or less − Low flow kitchen and break room sinks – 1.5 GPM or less − Low flow showers – 1.8 GPM or less

8. Water Saving Technologies Inside the Building Can typically reduce water by 30% - 40% with a combination of technologies − Ultra low flow urinals – 0.125 Gallons per Flush (GPF) or less − Low flow toilets – 1.3 GPF average or less − Dual flush − Air pressure assist − Ultra low flow urinals – 0.125 Gallons per Flush (GPF) or less − Low flow toilets – 1.3 GPF average or less − Dual flush − Air pressure assist

9. WATER RE-USE TECHNOLOGIES

10. Water Re-use Technologies Why do we throw water away and then pay to bring it back? Typically conserve first (can cut storage tank sizes in half) Can typically reduce water inside the building 80%+ with efficient fixtures and re-use water for non potable

11. Water Re-use Technologies Water re-use options − Municipal reclaim water − Irrigation − Toilet flushing − Greywater (sink and shower drains) − Irrigation − Toilet flushing − Condensate (from air conditioning units) − Can use for anything − Rainwater (from site) − Irrigation − Rainwater (from the right roof surface) − Can use for anything

12. Greywater Re-use Collect water from shower and sinks Can’t store it long without treatment (or stuff grows in it) Irrigation – sub-surface and not near crops Toilet flushing – may want to disinfect with chlorine or UV first

13. Greywater Re-use Greywater Rainwater

14. Condensate Harvesting Cooling coil condensate from air conditioning units Best resource is a psychrometric chart or program Need annual weather data for your location − Temperature − Humidity Assuming 1,000 CFM of fresh air in Orlando (enough for about 50 occupants) − 3 to 5 Gallons per Hour of water generated at peak cooling times

15. Condensate Harvesting

17. Rainwater Harvesting Collect from the site or the roof − Site – typically for irrigation only due to contaminants in run-off − Roof – should be a smooth clean surface (metal, singly ply membrane) if you want to bring it back into the building Good resource – Google “Texas Manual on Rainwater Harvesting” Use websites like NOAA for mean annual precipitation Orlando normally receives 48 inches of rain per year − Multiply rainfall with the collection area

18. Rainwater Harvesting

19. DISCOVERY TECHCENTER II CASE STUDY Water

20. General Project Info 60,000 SF office Owned by Taurus Southern Investments LEED CS 1.0 Gold Certified In the UCF Research Park In operation for 5+ years

21. Outside the Building Zero potable water for irrigation − Drought tolerant plants − Rainwater harvesting from site and retention pond Lessons learned – don’t spray onto wide sidewalks

22. Inside the Building Zero potable water for flushing toilets and urinals − Dual flush toilets and low flow urinals − Rainwater and condensate harvesting from roof and cistern 89% less water than a typical office Saves about 346,000 gallons per year Lessons learned − Smoothing inlet and floating intake could have avoided tank cleaning − Use established vendors − Avoid make-up directly into cistern if possible − Coordinate make-up cross connect with local Authority Having Jurisdiction

23. Harvesting Components Serving Interior

25. CONCLUSION

26. Conclusion Can typically reduce irrigation by 50% with sensible landscape and irrigation technology Can typically reduce water inside the building 30% - 40% with low flow fixtures Typically in Orange County – more water lands on our roof than what we use Can typically reduce water inside the building 80%+ with efficient fixtures and re-use water for non potable Conserve before re-use to minimize costs

27. QUESTIONS