在使用两种不同资源的两个独立设施中，使用低温至中温（49至88°C[120至190°F]）地热流体进行温室供暖已被证明是经济的。1.50°C[122°F]的资源是一口1522米[5008英尺]深的井，服务于2.4公顷[6英亩]的温室。地热能提供了三分之二的空间供暖，目前每年可节省8万美元。该装置采用强制空气加热。温室已有13年历史，1981年11月初开始使用地热系统。2.88°C[190°F]的资源是一口124米[410英尺]深的井，为1.2公顷[3英亩]的温室提供100%的热量，目前每年可节省8.5万美元。犹他州要求注入热流体。该装置采用热水、自然对流加热。温室从1980年6月开始运行，地热供暖系统从1980年9月开始运行。 这两个设施都采用了相对传统的抽热系统设计。没有二次热交换器的地热水的直接、直流通道，会对腐蚀和沉积的长期影响产生一些担忧。然而，经济因素决定了这一选择。这两个设施都使用井下（潜水）泵，使地热流体始终处于足够的压力下，以防止氧气进入和二氧化碳（碳酸氢根离子）逸出。引用:研讨会，ASHRAE交易，第88卷，第2部分，加拿大多伦多

The use of low-to-moderate temperature (49 to 88°C [120 to 190°F]) geothermal fluid for greenhouse heating has been demonstrated to be economical in two separate facilities, operating from two different resources.1. The 50°C [122°F] resource is a 1522 m [5008 ft] deep well serving a 2.4-hectare [6-acre] greenhouse. Geothermal energy supplies two-thirds of the space heating with a present-day savings of $80,000 per year. The unit employs forced air heating. The greenhouse is 13 years old, and operation began in early November 1981 on geothermal systems.2. The 88°C [190°F] resource is a 124 m [410 ft] deep well supplying 100% of the heat for a 1.2-hectare [3-acre] greenhouse with present-day savings of $85,000 per year. Injection of the thermal fluid is required by the State of Utah. This unit employs hot water, natural convection heating. The greenhouse has been operating since June 1980, the geothermal heating system since September 1980.Relatively conventional heat extraction system designs have been employed in both facilities. Direct, once through pass of the geothermal water, without secondary heat exchangers, gives some concern about long-range effects of corrosion and deposition. However, economic considerations dictated this choice. Both facilities use downhole (submersible) pumps to maintain the geothermal fluid under adequate pressure at all times so as to prevent entrance of oxygen and escape of carbon dioxide (bicarbonate ion).