Tenant Wants To End Lease 1 Month In...

[Dan Shelhamer]

So I just signed a lease with new tenants a month ago.  They have been nit picking and complaining here and there, and haven't even technically moved into the unit.  I took 1.5X for security deposit and 1st months rent.  

I just spoke to them today and they informed me their young son has respiratory issues and after explaining the living situation to the doctor, he highly recommend against them living in my unit.  The reasons they provided are due to it not having A/C, and the water heater is in one of the bedrooms in it's own closet and they are worried if it were to leak or break.

I used the lease which is provided here on Bigger Pockets in the Landlord Forms.  I was planning on keeping 1 months rent for them moving out early to cover the time it will take me to get this refilled.  Can I keep their entire security deposit which is 1.5x rent for breaking the lease?