Case Studies
Small business: Backpackers Hostel, North Shore Oahu
In summer 2015, Pono Home installed energy and water-saving fixtures at a vacation hostel on the North Shore of Oahu. Six months later, we evaluated the results from those installations and found the following results:
- 13 month average monthly energy usage reduction: 490 kWh
- 13 month average water usage reduction: 21,000 gallons
- Same month energy reduction: 1300 kWh
- Same month water reduction: 19,000 gallons
- Estimated annualized savings: $2,950
- Estimated annual carbon emission reduction:
- Payback period: 4.6 months
- One year return on investment: 61%
Download the small business case study report here
Retirement Communities: Catholic Charities
In spring 2015, Pono Home installed efficiency hardware and maintained large appliances at a 10 bedroom, 5 bath low-income senior living duplex in Kalihi, Hawaii, with the following results:
- 19 month average monthly energy usage reduction: 117 kWh, 10.29%
- 19 month average water usage reduction: 2,700 gallons, 18.01%
- Same month energy reductions: 168.9 kWh
- Same month water reduction: 3,000 gallons
- Estimated annualized savings: $717.41
- Estimated annual carbon emission reduction: 2,456.69 pounds of CO2 equivalents
- Payback period: 3.7 months
- One year return on investment: 69.33%
Download the retirement community case study here
Low-income housing
In spring 2016, Pono Home completed a free home efficiency pilot program for renters and low-income families in partnership with Hawaii Energy. 12,572 home efficiency products were directly installed into 579 homes on the islands of Oahu and Maui in this program, resulting in a statewide reduction of 485,548 kWh/year and an average estimated savings of $167,514.206 or $289 per home annually.
Download the low-income housing case study here
Schools
In summer 2016, Pono Home completed a pilot program at a Hawaii Department of Education elementary school on Oahu, which included education, survey research, and electronic hardware installations (timers and advanced power strips).
- 6 advanced power strips were installed, which will save an estimated 616.8 kWh per year or $195.96
- 2 PowerDown timers installed on water coolers, which will save an estimated 1576 kWh per year, or $500.70
- 51 9 watt (60 watt equivalent) LED lamps were delivered to teachers to use at home or in the classroom, and if they are used similar to a residential setting, will save 5472.74 kWh or $1738.69 per year