About TwisterTWISTER(tm) Geothermal Heat Exchanger Technology
Proven technology with a “twist” - reduces the cost of the vertical loop field by an average of 20%!
- Four 3/4” loops
- Cut drilling up to 50%
- 70 % lower BTR
- Centralized tremie system
- Continuous reels or coils
- No field assembly
TWISTER(tm) Geothermal Heat Exchangers are patent-pending systems that allow the simultaneous installation of 4 loops around a central Tremie conduit in a single vertical bore hole.
Borehole with one loop and a Tremie pipe
Borehole with TWISTER Pipe (4 loops and a central conduit)
TWISTER exchangers use 3/4” ASTM D3035/D3350 Cell Classification 445574C SDR 11 or 13.5 HDPE (IGSHPA Requirement) pipe spirally wound around a central 2” center pipe used to guide the Tremie pipe. Supplied on coils or reels, with factory prepared u-fittings, installation is quick and easy. Performance Characteristics are shown in the table:
|Formation Thermal Conductivity||Grout Conductivity||6” Borehole Thermal Resistance (BTR)||Bore Depth per Ton.||TWISTED Pipe:||1.6||0.4||.085||130'||Standard:||1.6||0.4||.276||210'|
Gaia Geothermal Ground Loop Design software has demonstrated that up to 50% reduction in loop length is possible.*
*Results will vary by installation. Follow IGSHPA guidelines
|O.D.||Center Pipe||Loop Pipe||Loops||ASTM||Cell Classification||4.475||2 HDPE||3/4” HDPE (SDR 11/13.5)||4   ;||D3035/D3350||445574C|
"I have used Agreenability's TWISTER product on several jobs. In each case the TWISTER was easy to install and because of the reduced amount of drilling I saved thousands of dollars on the cost of each loop field. I will continue to use the TWISTER for all my vertical jobs in the future."
Antonio Poccia, Perfection Contracting, Newton, NJ