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Electric Magic

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I've been asked to quote for replacing a window extractor fan on a double glazed kitchen window. I've not done this before so haven't said yes yet as I want to make sure I'm not going to muck up the seal. For those with experience in this area, presumably when the hole for the fan was originally cut (provided it was done properly by a glazier) it should have been sealed independently from the fan unit? E.g. when I remove the fan I should be able to do so without compromising the seal? Or should I steer clear and suggest the customer has a new wall fan instead?
 
I've never seen a fan on a double glazed sealed unit, but am certain the window will be sealed and will remain so when the fan is removed. You could include a note in your quote that all due care will be taken but you will not be held resonsible if the seal is found to be compromised during the work.
 
as above.a disclaimer is advised.
 
reminds me of a job, years ago. i had fited a viper shock sensor to a patio door frame. customer had condensation within the sealed D/G. their "engineer" said it was due to me drilling holes for the viper. "hold on", says me. "look at this. viper attached with superglue, no holes. up yours mate".
 
I fitted one a couple of years back. It was a replacement fan and the new fan had bolt through connectors to keep both sides of the fan together. In this case the new bolt holes were not in the same position as the old ones so had to replace the DG unit also. Not that expensive but a PITA. So be a bit wary with regards to possible extra costs, and mention this when quoting. You will be able to get tech specs from the extractor websites to see if one particular fan is suitable for the current opening.
 
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reminds me of a job, years ago. i had fited a viper shock sensor to a patio door frame. customer had condensation within the sealed D/G. their "engineer" said it was due to me drilling holes for the viper. "hold on", says me. "look at this. viper attached with superglue, no holes. up yours mate".

Does my head in when companies try to get out of their duties by basically clutching at straws as to why it is not their responsibility. The likelihood of a couple of inch eights screwed into a frame causing a sealed unit to mist up is somewhere between nil and negligible. Obviously yours was glued and I hope you told the 'engineer' to man up!
 
certainly did. even if i have to screw them on, i use 1/2" x 4's. thing is , these days, PIRs are so cheap and it's easier to conceal the wiring, that fitting shock sensors is not the best option. had an irate customer once, phoned up saying he'd had a false alarm. turned out it was a shock sensor on a window.close investigation showed the imprint in dust of a pigeon's body and wings on the glass with a spattering of what it had recently half eaten. "works then" says the now happy customer.
 
from the top of everest, he could clearly see anglia , unless he was wearing a safestyle suit
 

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