Hello there! Looong time no see!

So, my girlfriend and I just went to the Maryland reptile show Saturday morning, just to browse, and well, she ended up leaving with a baby male ball... Afterwards, I helped her pick out everything for a tub set up, and that's really motivated me to switch over to a tub myself (been using a tank for 3 years and it's definitely a headache). However, I just read in another thread that, if you don't have really warm ambient temperature in the room already, a tub doesn't really work out so well? Is there no good way to increase the ambient temperature of a tub? Is just an UTH not sufficient? My house is usually kept around 70, so it's not 'cold', but it's not exactly warm, either. So, I imagine it'd need a little help. Any advice would be much appreciated.

Thank you!
Brittney