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I build telephone switches and have installed a large number of these systems. Halon is being replaced by other gases but the systems are similar.
No, you can't afford it.
Your house likely isn't sealed well enough to use such a system.
It wouldn't be easy to retrofit into an existing house, if you want to hide the components.
No maintenance, really, apart from checking its integrity from time to time.
There are fires that occur in houses that wouldn't be well covered by such a system. Attic fires come to mind.
You really wouldn't want to be in the house if it went off.
The gas itself wouldn't make a mess but it would definitely stir one up, what with the dust and loose items that exist in your house.
A hand-held extinguisher is probably a good idea, for the kitchen, garage, etc.
JR
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