Heating Systems in Geothermal Greenhouses

Heating installations with natural air movement (natural convection):

(a) aerial pipe heating
(b) bench heating
(c) low-position heating pipes for aerial heating
(d) soil heating - heating installations with forced air movement (forced convection)
(e) lateral position
(f) aerial fan
(g) high-position ducts
(h) low-position ducts

(von Zabeltitz, 1986 as qtd International Geothermal Association)