8:30a.m.- 9:30 a.m.
Kevin, Brent, Jeff, Hans, Lisa & Emmanuelle.
Geothermal System Sizing
Brent is working on selecting equipment/manufacturers that might help shave up to 1kw on the all system and 10-20% off the geothermal load. Bill Slauder installs horizontal systems for 10 to 20% less than the cost of vertical systems.
There is sufficient space for a horizontal field, which can be landscaped. A horizontal test cost about $5,000, a vertical test is $10,000 to $15,000. The hole drilled for the test can be integrated into the actual loop. Horizontal systems perform more efficiently than vertical systems.
Brent has data from a hybrid system of a home down Priest Creek near rabbit ears, however the difference in topography and geology, might change the TC value. Brent will be able to see the soil when we the holes are drilled for the test and get a good idea of the site conductivity.
Geothermal Downsizing and Upsizing of Solarthermal
The direction to go now should be to upsize the solar thermal portion and downside the geothermal. We will not have a netzero system but it maybe be a good way to provide a heat sink and avoid overheating. Larger geothermal will require larger storage tanks (a 3,000-4,0000 gallon storage is about the cost of a hole).
The goal is to get less of a PV array. In the beginning, we may decide to install 2/3 of geothermal to avoid overheating, which would bring the home within 10% of being netzero. After evaluating consumption and boiler usage, the system will be adjusted.
Lisa mentioned the Rinaii on-demand electric or gas hot water heaters, which could be a good solution in place of the boiler, but would be redundant with the new boiler.
Winterizing
Need to finish the calking that Chad suggested, the front door is ordered, then will be ready for the blower test.
Polycarbon
Brent ran the model for both 25mm and 45mm polycarbonate, 45mm shaved a million btu on overall load, and only 5,000btu/hour peak load.
Lighting
Brent is exploring better equipment for appliances and lighting to fit within the sizing. Amy and Kevin are considering several lifestyle changes, including getting ride of the hot tub and using automatic light controls.
LED lights can save up to 80%of lighting electric load. Brent saw the cans that could be used to replaced on the main level through access in the attic, however the process would be quite intrusive. Ledtronics lightbulbs might be a better option.
Jeff is including two solar tubes in the kitchen, which should reduce the load considerably. Adding solar tubes in other high electric usage areas such as the office might also be a good option.
Jeff also found a couple of good system for framing the walls at the green house.
Planting plan is too early to finalize, bed design and greenhouse function.
Action Items:
Brent needs to finalize the geo numbers to make sure the field fits.
Find competitive geothermal contractors and equipment.
Look at Ledtronics led bulbs.
Jeff is pricing the structure including the cost of 25 and 45mm polycarbonate panels.
John, Cameron, Lisa and Emmanuelle will start to design the rain water system.
John, Lisa and Emmanuelle will provide a proposal for the constructed wetland septic system
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