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Ensure that the device drains into a sewer
●
system which leads outside, and is
suitable and installed for this purpose.
Ensure that air valves and grilles are not
●
obstructed, and that they are clean.
1) A qualified installer is one who is employed by a central heating or civil
engineering installation company registered with the Chamber of
Commerce and who is registered in the SEI qualification register, or holds
a Sterkin certificate.
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