Patent ID: 7874288

Claim:
A gas combustion apparatus having an outer case 10 accommodating a combustion apparatus main body having an exhaust collector 14 connected to an exhaust cylinder 15 therein, in which the outer case 10 comprises a case main body 2 of rectangular box shape with a front side opened, and a front cover 3 for closing a front end opening of the case main body 2 , wherein the case main body 2 has an inner peripheral flange 20 formed on an inner peripheral edge of the front end opening of the case main body 2 , the inner peripheral flange 20 extends inwardly from a top plate 23 of the case main body 2 at the front end opening, the front cover 3 has an opposite inner peripheral flange 39 formed on an inner peripheral edge of a rear end of the front cover 3 , the opposite inner peripheral flange 39 extends inwardly from an upper side portion 33 a of the front cover 3 , so that when the front cover 3 is closed, the inner peripheral flange 20 and the opposite inner peripheral flange 39 are hidden under the upper side portion 33 a , a waterproof packing material 17 is sandwiched between the inner peripheral flange 20 and the opposite inner peripheral flange 39 , a protection plate formed at the upper side portion 33 a of the front cover 3 covers from above a range extending along an upper edge of the front end opening of the case main body 2 of the packing material 17 , the protection plate being flush with the top plate 23 of the case main body 2 , wherein a tip end of the protection plate is disposed so as not to extend above the upper side portion 33 a when the front cover 3 is closed.