On 30 July, 17:03, NT wrote:
On Jul 29, 5:12 pm, Bear wrote:

Luckily my tumble dryer (once purchased) can sit aside an external
wall in the utility room. Question is, how do I bore a hole through
the wall of reasonable size? I'm handy with a drill, but the last
vented dryer I saw required a hole around 6 - 9 inches in diameter!

A better answer is dont. Sorry but you've made the wrong purchase. A
vented TD will probably cost you more over its life that it would to
bin it and get a condensing dryer

NT

pssst

"Luckily my tumble dryer (once purchased) "

"Just to revive an age old argument before purchase - vented or
condenser?"

were the OP's clues you omitted to read/understand before your usual
helpful response.

Cheers
Jim K