If you are worried about it being safe for the inhabitants of the house, then yes, it is generally safe. If the air conditioner is running with a dirty filter or sending air through dirty vents, using it all the time could lower the house’s indoor air quality. But as long as you have an air conditioning Tunbridge Wells company like this example perform regular maintenance on the unit at least once a year, you’ll be fine.
As for whether or not it is safe for the unit itself, well, running it 24/7 may reduce its lifespan. Or it may not. Using it that long will lead to more wear and tear between the moving parts of the machine, but moveable parts can generally be replaced, and a breakdown of these is not usually what kills AC units. Plus, chances are you’ll be looking to replace your current unit for a more energy-efficient one long before this one experiences mechanical failure, so there is little reason for concern on this front.