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NTIS 바로가기국가/구분 | United States(US) Patent 등록 |
---|---|
국제특허분류(IPC7판) |
|
출원번호 | US-0649538 (1976-01-15) |
발명자 / 주소 |
|
인용정보 | 피인용 횟수 : 23 인용 특허 : 0 |
A water heating system includes a boiler which is connected with a source of water supply for receiving water under pressure. An exhaust flue is connected to the boiler for the discharge of gaseous products of combustion. A pair of concentrically arranged coils is positioned within the exhaust flue
In a water heating system which includes a boiler, first conduit means connected between a water supPly and said boiler, means for heating the water within and means for supplying water under pressure to said boiler, and an exhaust flue for discharging heated products of combustion from said boiler,
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