A shell system (200) for a building facilitating internal bottom-up flow of air inside the shell system, the shell system comprising:
- a) a plurality of modular thermal panels (100), wherein each said modular thermal panel comprises:
- i. an enclosed frame (106) having two side faces (106a), a top face (106b) and a bottom face (106c), wherein two openings are formed in said frame faces;
- ii. an internal face (102), sealingly enclosing an internal opening of said frame;
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- iii. an external face (104), sealingly enclosing an external opening of said frame;
- b) a plurality of horizontal try-squares (150) for individually assembling each one of said plurality of modular thermal panels, wherein each try-square comprises:
- i. a back panel (158) configured to securely attach said try-square to the external belt of a floor or skeleton of the building;
- ii. an interconnecting-oblong-panel (156) extending outwardly perpendicular to said back-panel, wherein said interconnecting-oblong-panel (156) extends outwardly a distance that match the width of said enclosed frame (106);
- iii. an interface-oblong-panel (153) is secured attached to the edge of said interconnecting-oblong-panel that opposes to said back-panel, wherein said interface-oblong panel (153) extends perpendicularly from said interconnecting-oblong-panel (156), forming an upper-interface-edge (154) and a lower-interface-edge (152),
- wherein at least one frame-opening (108) is formed, at a preconfigured location in each of said faces (106a, 106b and 106c) of said frame, allowing air to flow from/to any adjacent modular thermal panel;
- said top face (106b) of said enclosed frame (106) further comprises a top mounting device (1070) and wherein said bottom face (106c) of said enclosed frame (106) further comprises a bottom mounting device (1050);
- an inner gap (109), filled with air, is formed between said internal face (102) and said external face (104) of each said modular thermal panels;
- said plurality of modular thermal panels, or a portion thereof, form at least one wall having a shell-bottom edge (210) and a shell-top edge (220);
- said modular thermal panels are sealingly interconnected, using said tri-squares, and said frame-openings of all adjacent frame faces are aligned to allow air flow between one of said modular thermal panels and any adjacent said modular thermal panel;
- said at least one wall is configured to receive external ambient air only from said shell-bottom edge into said inner gap, which received air flows upward, due to convection, through said frame-openings, and to exhaust said at least one wall only through said shell-top edge back into the external ambient air;
- for each floor in the building, said horizontal try-squares (150) include a respective lower try-square (150lower) and a respective upper try-square (150upper);
- each said upper-interface-edge (154) of a respective said horizontal try-square (150lower) is configured bear said bottom mounting device (1050) of said bottom face (106c) of said enclosed frame (106) of a modular thermal panel (100) assembled above that try-square (150lower);
- each said lower-interface-edge (152) of said horizontal try-square (150upper) is configured to support said top mounting device (1070) of said top face (106b) of said enclosed frame (106) of a modular thermal panel (100) assembled below that try-square (150upper);
- each said modular thermal panel (100) is configured to be individually assembled between said lower try-square (150lower) and said upper try-square (150upper) from inside the interior space (22) of the building or from the ambient space (20);
- said try-squares (150) are continuous or segmented;
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- when using a continuous try-square, at least one try-square-opening (159) is formed through said interconnecting-oblong-panel (156) of said continuous try-square, to facilitate flow of air from a lower said modular thermal panel (100) to an upper said modular thermal panel (100).