There are ways around that for arguments sake connect it to a humidity stat so the tenant has no control over it. Recent job I suggested a landlord sub meter which we did in the end it won’t cost that much to run it’s protecting the property without the tenant worrying about the electric...
https://www.permagard.co.uk/nuaire-flatmaster-2000-heat-piv?___store=default&gclid=EAIaIQobChMIwpyR983CggMVsYdQBh0K0wCbEAQYAiABEgIlnPD_BwE
A PIV system is the way to go, I recently installed these on a job