Rochester Public
Utility's Geothermal Installation in Habitat
for Humanity Homes
From
RPU website
Our community involvement efforts include
promoting energy conservation. That's why we worked with the
local Habit for Humanity to install geothermal units in two
local homes.
Habitat for Humanity Homes
904 & 910 East Village Circle Dr SE
Rochester, MN 55904
Home Specifics:
Split entry home
1,598 total square feet: 816 sq. ft. top floor (24 x 34)
782 sq. ft. on for bottom floor (23 x 34)
2 x 6 studding used throughout
Tyvek used on entire outside
Electric outlet boxes located on outside walls are caulked
Vapor barrier installed throughout the entire inside of the
house
All walls are R-19 (note: the basement is 2 x 6 wood)
Attic is R-38
Geothermal Heating and Cooling System:
Installer: Tri-County Plumbing & Heating, Stewartville, MN:
(507) 533-9418
Equipment manufacturer: WaterFurnace International, Inc.
System size: 28,000 btus/hour, 2.5 tons
Desuperheater equipped (provides some water heating)
Earth Loop:
Installer: Enviro-Tec, Inc., Cresco, Iowa: (800) 728-6187
¾ inch polyethylene pipe
700 ft of pipe per ton
Horizontal "Slinky" configuration
Air-to-Air Heat Exchanger:
Installer: Tri-County Plumbing & Heating, Stewartville, MN:
(507) 533-9418
Equipment manufacturer: Venmar, Inc.
160 cfm
Efficiency at 32 degrees is 69%; at 13 degrees is 62%
To see the actual energy cost for the geothermal system
compared to the projected energy cost of a standard natural
gas furnace and water heater, view the
table that details these homes' usage (a PDF document). |
