Houghton H2000C Owner's Manual page 12

Load bearing of roof:
 The roof shall be able to bear the weight of the
air-conditioner and shall be level without accumulating
water. It is suggested that the caravan manufacturer
confirms the suitability of the roof for load bearing.
 If the roof is not preserved with holes, they shall be
punched from the top of the roof to the inside and use
them as leading to punch through the ceiling. It is
suggested to consult with the caravan manufacturer to
get the best punching method.
 The 400x400mm hole shall be boarded up with wood
sections that are at least 20mm thick. This boarding is
to ensure that the roof will not crush from the
installation bolts and that air conditioned air does not
enter the ceiling space.
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