An air-handling unit for use in a greenhouse. The unit provides an efficient, sturdy and easily assembled and transported means for drawing air and/or gas into a greenhouse air distribution conduit. The unit also provides an efficient means for adjusting the temperature of air drawn into air distribution conduits by the air handling unit by causing more incoming air to be exposed to an internal temperature-adjustment element. The unit comprises a housing body, an air inlet, an air outlet, a fan, and a temperature-adjustment element.
