| 摘要 |
Heating apparatus comprising a heater unit (10) close coupled to an air inlet and exhaust outlet device (11) which is detachable to provide access to a removable burner assembly (70) and automatic electronic control means (72) which are assembled as a replaceable unit. In the apparatus an exhaust flow space (18), an air entrance chamber (33), an air chamber (66) and a combustion chamber (41) are close together and substantially parallel so that the apparatus is compact and can be mounted in an opening in a wall (1) with minimal external projection.
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