Zero Clearance Box

Abstract

An air feed system for a zero clearance box, wherein a combustion unit is configured to be located inside a box housing of the zero clearance box, the air feed system comprising: a flue adaptor for connection between a flue and an exhaust outlet of the combustion unit; and an air transfer channel for air communication between the flue adaptor and an air inlet in the box housing, wherein the air inlet is configured for sealed connection to the combustion unit; wherein the flue adaptor has: an exhaust air passage for exhausting gases from the combustion unit to the flue; and an air feed for receiving intake air from an external air source; whereby the intake air is directed through the air transfer channel, and transferred to the air inlet for combustion by the combustion unit. And a zero clearance box for receiving a fireplace combustion unit, comprising: a box housing having an interior configured for receiving the combustion unit and an exhaust opening through a top wall of the box housing through which a flue adaptor locates for exhausting exhaust gas from the combustion unit into a flue; an air feed system including a transfer channel for communicating intake air from an external source into the box housing wherein the transfer channel is configured for sealed connection to the combustion unit; the box housing having walls being insulated panel walls. 20 26 20 12 59 19 F eb 2 02 6 2 0 2 6 2 0 1 2 5 9 1 9 F e b 2 0 2 6 Fi gu re 5 Fi gu re 6 26 28 50 22 10 30 21R E R E E 23 23 29 14 18 54 R 26 47 48 50 18 60 67 51 24 27 4 / 9 2 7 0 9 2 4 1 0 6 7 2 3 4 8 2 6 2 8 E E F i g u r e 5 E 4 7 R 5 0 2 1 2 2 R 2 3 1 4 R 5 4 1 8 3 0 5 0 F i g u r e 6 B 5 1 2 6 1 8 2 9 4 / 9 20 26 20 12 59 19 F eb 2 02 6 2 0 2 6 2 0 1 2 5 9 1 9 F e b 2 0 2 6 EE 2 8 4 7 4 8 2 6 2 6R 2 3 2 32 2 1 0 1 8 5 1 2 44 / 9 6 01 4 1 8 2 7 5 4 R R 6 7 2 9 E 5 0 2 1 F i g u r e 5

Images