Rinnai Corporation

Rinnai New Zealand Ltd.

Ikuo Tsunekawa

Keiichi Ito

Satoshi Kaneiwa

Minoru Oguri

Brian Smith

Gregory Brinsden

A drain pipeincludes an upper end portionwhich is connected to a concaveof a leading endof an exhaust tube, and a lower end portionwhich is opened to the inside of a warm air furnace below the concave. The lower end portionis formed as a tubular portion where a membrane is formed at a plane orthogonal to an axis lineby a surface tension of a drain. A leading endof the tubular portion is formed as an openingwith an area large enough such that the membrane is not generated by the surface tension of the drain.

Warm air furnace

In an in-wall heater, in which control equipmentis disposed in a side spaceon one lateral side of a combustion housingwithin an outer caseand an exhaust ductis disposed in a side spaceon the other lateral side of the combustion housing, the cooling performance of each of the side spaces is increased and noise due to a sucked-in sound of room air can be reduced. In a side plate portion of the outer caseon both lateral sides, an air intake opening, which is vertically long, is provided in a position in a front side portion exposed to a front of a room wall. Each side spacewithin the outer caseis formed in a ventilation flue on the suction side where the room air from each of the air intake openingsis conducted into the warm air fan

In-wall heater

Growing community of inventors

Nagoya, Japan

Ikuo Tsunekawa