Geothermal Recreational Facilities

Koronis Civic Arena - Paynesville, MN Koronis Civic Arena in Paynesville, MN opened in the spring of 2004. The existing geothermal system
in place operated ice from October to March. They wanted additional capacity to run early summer ice.
We installed a new fluid cooler, two additional low temperature heat pumps, and re-piped entire mechanical
room with larger piping for increased flow. Future provisions were left for dehumidification unit, for year
round ice. The arena operates from October to March and one month in summer for hockey camps. The
facility is used for practice, games, and tournament events.

Graham Ice Arena Complex - Rochester, MN Harty Mechanical installed a new geothermal system in Graham IV Arena that includes many energy saving
options. Waste heat from the ice making process provides the following: Heated Spectator Seats, In-Floor
Heat in the Rink Perimeter and Mezzanine, Heating of common areas including locker rooms and offices,
Snow Melt Pits for resurfacing waste. Other energy saving devices include Variable Frequency Drives on the
pump motors, ERV units for outside air requirements and heating/cooling and High Efficiency water heaters.

Graham I Arena was converted from a conventional refrigeration system to geothermal by replacing the
refrigeration equipment with four low temperature water to water heat pumps that use an earth friendly
refrigerant and modifications to the rink piping. This is the first North American conversion of an existing
ice arena to geothermal utilizing our innovative rink header piping design. The piping changes will increase
energy savings by 35 to 40%. Waste heat form the ice making process provides the following: Heating of
the building and Heating of Domestic Water.

Packer Arena - Austin, MN Packer Arena opened in December of 2002. We were the installing contractor of complete ice system
including geothermal well field, all under floor tubing, header piping, six low temperature heat pumps, and
fluid cooler. The system includes snow melt and in-floor heat for locker rooms. Installing contractor of complete
plumbing and mechanical system including plumbing pipe, equipment, fixtures, ERV unit, louvers, dampners,
ductwork, and temperature controls. The arena operates from early fall until late spring. It's used as a practice
facility and tournament facility for Austin Public Schools hockey teams and for Austin Youth hockey practice,
games, and tournament events. The City of Austin has a existing facility they also use for practice, games, and
events. This facility, Riverside Arena is a refridgerated ice system.