Heating device for maintaining non-freezing temperature in vineyards or truck farming has J-shaped aerial structure with air flow forced and warmed between inlet and outlet

摘要

Aerial structure (12) is J-shaped, has slightly vertical barrel (17) with inlet (18) at top and bend (20) with outlet (22) at bottom. Air flow is forced by commands (14) through veins (80, 82) from inlet to outlet. Partition (81) separates air flow between veins. Air is warmed by heater (74) situated near outlet.