@Laura2327
My goodness me, I learn something new every day.
The smallest of window mount room air conditioners would have to weigh at least 35Kgs (80Lbs) . I shudder to think of the consequences of unskilled personnel putting this weight into a frame on a third floor window....far out!! Did they fix it in or just let it sit there to vibrate its way out and down to what ever was three floors below!!!
You have to make sure guests are aware of whether they can use supplied equipment or not, don't under any circumstance remove the installed equipment and leave it where the guest might find it and take actions into their own hands.
Laura, this is a serious disaster waiting to happen....I know what I am talking about, in my working life I owned a mechanical services company, that is what we did....supplied and installed air conditioners!
Laura, guests will be guests, if you leave a loaded gun around they will find a way of shooting themselves.....securely fix those air cons in place so they can't be tampered with and instruct the guest on when they can use them and when they can't.
You can buy and ambient temperature sensitive power switch which you can set to allow power to each air con in a limited temperature band ....only cool if ambient is above 28c (82f) or heat when the temp is below 16c (60f)./ They are not expensive, (about the $28 US mark) but they will pay for themselves in running cost savings and you won't be sued because the guest tampered with something you left lying around!
Cheers........Rob