Patio door handle key lock on Outside and Inside

A home owner from Naples, FL says:
We have a 3-section sliding glass door leading to our lanai. I'm looking for a key lock that works both from the inside and outside. We have hurricane shutters over a portion of our lanai; one allows access from outside and inside the lanai. If power failed, can get into the lanai through the hurricane shutter but still need to unlock the sliding glass door or leave it unlocked.

I'd prefer to be able to lock/unlock the sliding glass door from either side. Any lock that will enable us to do that?
Thank you.
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Dave Sr. from SWISCO responded:
Thank you for posting. We actually do not recommend that customers install any type of handle that has a keyed lock on both sides, as this presents a serious fire hazard. Would a secondary lock suit your purposes?
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