year-round heating, cooling, and dehumidification.

Greenhouses need climate management every hour of the year. Geothermal heats and dehumidifies at the same time - holding VPD in the sweet spot and starving disease before it starts.

CEA & Greenhouses — Fifty Under (content sections)
The challenge

Climate control, every hour of the year

U.S. greenhouse operators spend over $1.3 billion a year on fuel and utilities — energy runs roughly 35% of operating cost. And conventional equipment forces the heat-and-vent cycle: burner on, vents open, and the humidity dumped along with the heat you just paid for.

The GSHP difference

Heat and dehumidify — without venting the energy

A ground-source heat pump heats and dehumidifies at the same time, displacing the energy penalty of heat-and-vent. Instead of opening vents to dump moist air, the system pulls the moisture out and keeps the heat inside the house.

The Old Way — Heat and Vent
Vent Open Burner Delivered Propane Heat, Moisture & CO₂ Out Vents Cracked Most of the Time No Connection to the Ground
Venting to dry the air carries off the heat and CO₂ you paid for — then you reheat.
Fifty Under — Separate and Recover
Vents Stay Shut Heat & CO₂ Stay In Heat Pump Moist Air Warm Dry Air Condensate to Irrigation ≈50°F Ground Every Day of the Year Winter: Heat Out Summer: Heat In
Moisture is condensed out and reused; the heat and CO₂ stay in the house.
Crop health

Hold VPD in the sweet spot

When the burner cycle and vent swing push VPD out of range, you invite botrytis and powdery mildew. Steady temperature and humidity keep VPD in the band that maximizes transpiration and starves disease pressure before it starts.

Vapor Pressure Differential — VPD (kPa)
SWEET SPOT 0.0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 12a 6a 12p 6p 12a Conventional (heat & vent) Geothermal (steady)
Geothermal holds steady temperature and humidity, keeping the reading in the middle band.