Heating/cooling options while renting?

[naddis01]

Ok guys, we are currently renting a house which basically has no heating. There is a gas bayonet in the lounge room but it is hooked up to gas bottles (only gas option available here) and I'm not keen on unflued gas heaters anyway. So what are our options for heating the house? Obviously being a rental I don't really want a permanent solution that only benefits the landlord in the long term. Window rattler, portable air con, electric heater? What is out there? I was thinking a portable split system but no one appears to make them any more.

Thanks in advance.