I should add that it's important to set the fan speed right - too fast and the tenant will be complaining of drafts, too slow and the unit won't be as effective as it could be. Also, make use of the diffuser blanking wedges if its location risks throwing a draft down an adjacent wall (this'll make more sense when you read the instructions and have a unit in front of you).
Finally, make sure the loft space, where you're fitting the unit, is well ventilated, insulated and dry - otherwise you'll risk blowing moist, stale air back into the property. Any water tanks up there should be well covered.
I'm also not a fan of the heater version - that's mainly due to the energy efficiency bit of me balking at the thought of a 500w electric heater clicking on and off with gay abandon... Client's choice at the end of the day, but all Drimaster versions will cure condensation equally well. No point bothering with competitor's products IMO - Nuaire invented the technology and the Drimasters are simple, effective and well priced.
