Utility Cost Savings and Near Zero Carbon: Come see what an array of renewable energy and energy efficiency projects can do for an existing dwelling.
or less of hot water
75% to 99%
of space heating
or more of air conditioning
- Bob Large
- 44320 Munz Ranch Road, Lake Hughes, CA 93532
- 3,000 sq ft
- Energy need met:
- 25% or less of hot water
- 75% to 99% of space heating
- 100% or more of air conditioning
- Deep energy retrofit
- Zero net energy
- Event Participation:
- ASES National Solar Tour 2015 Host
- November 2014
- Size of System:
- 4 tons
- To heat hot water
- For space heating
- For air-conditioning
- Gross Cost of System:
- Value of Tax Credits:
- Net Cost of System:
- Own or Lease:
- Cash Purchase
- Additional Financial Notes:
- Financed through credit union Home Equity Line of Credit (HELOC) loan.
What You Need to Know
To complement the PV power system, a Water Furnace 7 Series Continuously Variable GSHP was installed. This system includes a closed loop, horizontally-trenched Ground Heat Exchange (GHEX) pipe, with 5 x 125' trenches, 5000' of pipe, unpressurized variable speed flow center, slaved to the GSHP system. De-superheater DHW, MERV11 Air Filter and Performance monitoring options.
Replaced noisy external compressor unit, freed space adjacent to house.
Semi-annual filter replacement, had to add some water to flow center.
Efficiency or Sustainability Improvements:
External sun screen, lighting upgrade to LEDs, upgraded interior blinds, insulated garage door, bamboo flooring, upgraded windows, etc.
(1) Sustainable future concern (2) Energy cost savings
Had to go beyond local contractors to get significant systems. Some extra effort and time required to work with Building and Safety, due to uniqueness of system.
Experience with Installer:
Excellent team. Worked with me on hiring local backhoe operator. Primary goal was to obtain most efficient system available.
Due to lack of local climate/soil data, I did extensive research prior to signing the contractor. Trenching was very challenging due to step slopes and tough digging (decomposed granite).
Open House Info:
9:00 AM to 5:00 PM on Saturday, 3 October 2015 and Sunday, 4 October 2015, The house is on a ridge several hundred yards off of Munz Ranch Rd on a private road. Limited parking right at the house, but we will ask neighbors to assist in providing overflow parking.
View Other Case StudiesSearch for Other Case Studies
The EnergySage Marketplace