combustion inadequate flue inadequate ventilation gas / gas supply system / gas escape / gas flames / room-sealed gas water heater / defective gas water heater / registered gas installers / protective device / gas appliance / flame failure device / gas water heaters / combustion products / registered gas contractors / incorporated oxygen deficiency device / registered gas contractor / room-sealed sink gas water heater / toxic gas / petroleum gas / gas supply / routine maintenance services / gas safety / odourless and tasteless gas / escape faulty equipment / instantaneous gas water heater / gas appliances / gas water heater / gas water heater installations / /
Organization
Electrical and Mechanical Services Department / / /
Domestic Gas Appliance Safety http://www.info.gov.hk/emsd/leaflets/dom_gas/dgas-e.htm KNOW MORE ABOUT GAS SAFETY