Smart lock for my door?

I have two separate locks on my door. The upper one is Zoo MK5 cylinder lock (knob inside, keyhole outside); lower one is a split spindle latch (lever handle inside, keyhole outside).

To open the door from the outside, I need to unlock the upper lock and then use my key for the lower lock to turn the latch.

I’d like to add a smart lock. What’s the best way to make this door smart? Is it to (1) make the lower lock a proper lock + latch and ignore the upper lock or (2) make the lower lock a latch that can be opened with a lever handle from both sides without a key? Which is less likely to affect the fire resistance of the door or hinder escape in case of emergency (because this is a leasehold property)?

Asked by Sean on 21st Aug 2024
Expert Trade Answers
"From the description you have given I would say removing the bottom lock to make way for a new smart lock and handle would be the best way to accomplish what you are looking for, however i could give you a better answer if i could see photos of the door itself and the lock set up"
Answered on 21st Aug 2024 - Member since Jul 2024 - report
"If you could post a photo of the lock it might help but I would say remove the bottom lock and just use the split spindle case the smart lock will operate the handles as required but it does depend on the smart lock you get"
Answered on 21st Aug 2024 - Member since Mar 2021 - report
"Fitted digital lock on door should take about 1 hour to fitted,cost £100"
Answered on 11th Sep 2024 - Member since Aug 2024 - report
"Good morning from KJC Locksmiths.
The best solution for this situation would be replacing both the cylinders for smart cylinders.
The two I would recommend are
1: i loq this is the most secure and no batteries involved as get power via nfc from you phone and keys are digital and held on your phone.
2: EVVA
Similar to I loq but works via Bluetooth and cylinders have batteries in.
Another option would NUKI
Which would work well in this case as had a similar setup on trial of an early version of the NUKI but was too noisy but they have improved greatly since then.
Hope this helps.
Kevin"
Answered on 29th Aug 2024 - Member since Oct 2023 - report
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