https://electrek.co/2025/04/02/dandelion-geothermal-lennar/
"Over the next two years, homebuilder Lennar is outfitting more than 1,500 new
Colorado homes with Dandelion Energy’s geothermal systems in one of the largest
residential geothermal rollouts in the US.
The big draw for homeowners is lower energy bills and cleaner heating and
cooling. Dandelion claims Lennar homeowners with geothermal systems will
collectively save around $30 million over the next 20 years compared to using
air-source heat pumps. Geothermal heat pumps don’t need outdoor AC units or
conventional heating systems, either.
Geothermal systems use the sustained temperature of the ground to heat or cool
a home. A ground loop system absorbs heat energy (BTUs) from the earth so that
it can be transferred to a heat pump and efficiently converted into warmth for
a home. Dandelion says its ground loop systems are built to last for over 50
years and should require no maintenance.
Dandelion’s geothermal system uses a vertical ground closed-loop system that is
installed using well-boring equipment and trenched back into the house to
connect to a heat pump. The pipes circulate a mixture of water and propylene
glycol, a food-grade antifreeze, that absorbs the ground’s temperature. A
ground source heat pump circulates the liquid through the ground loops and it
exchanges its heat energy in the heat pump with liquid refrigerant. The
refrigerant is converted to vapor, compressed to increase its temperature, then
passed through a heat exchanger to transfer heat to the air, which is
circulated through a home’s HVAC ductwork."
Via Esther Schindler.
Share and enjoy,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
