It applies to the gas exhaustion and ventilation from the chimney of a vessel. It can achieve the effect of watertight class water proofing.

烟囱可闭百叶窗适用于船舶烟囱排气通风，可达到风雨密防水效果。

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Depending on an applicant's needs, it will pay for things such as loft insulation, draught proofing, gas room heaters with thermostat controls, gas, electric or oil central heating.

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Draught-proofing can cut gas bills by 10% by merely putting sticky tape around windows and doors.

BBC: Gas prices rising: Can you cut your bill by 15%?