Methods and apparatus for ductlessly distributing and circulating heated air from a gas-fired heater to heat large volumes of air in industrial facilities

An apparatus for heating, circulating and dispersing air in industrial building facilities and the like, comprising:

• (a) an upstanding structure of substantially right parallelepiped configuration including an assambly of lower, intermediate and upper modules arranged one atop the other and secured together to define a substantially unobstructed vertical chamber extending through the assembled modules;
• (b) each of the modules having a framework which defines upper and lower mounting flanges extending perimetrically in horizontal planes near upper and lower ends of their associated modules;
• (c) the upper and lower mounting flanges of adjacent modules being releasably connected to releasably interconnect the modules;
• (d) closure means closing the upper end of the upstanding structure;
• (e) each of the modules additionally having four substantially rectangular sidewalls secured to their associated framework, each of the sidewalls of the upper and lower modules having a plurality of apertures formed therethrough to facilitate the passage of air therethrough, and the sidewalls of the intermediate module being substantially imprevious to inhibit the passage of air therethrough with the exception of one of the intermediate module sidewalls having an opening formed therethrough for receiving heated air being discharged from a gas-fired heater;
• (f) a heater positioned externally of said one intermediate module sidewall so as to avoid obstruction to said chamber and mounted thereon, said heater having gas-fired means for heating air drawn externally of said modules into said heater from within said industrial facility for discharging heated air through said intermediate sidewall opening into the intermediate module for combining with and augmenting air passing vertically through the chamber;
• and,
• (g) an electrical blower assembly disposed in said vertical chamber at a location between the upper and lower module apertures and including a fan for drawing ambient air through the apertured lower module sidewalls, for ducting such air upwardly through the chamber for combination with heated air being discharged into the chamber by the gas-fired heater, and for discharging such combined air through the apertured upper module sidewalls.