Which Bathroom Heater?

I just don't know whether bathroom heater are safe? what size,feature,types is going to better for me can anyone let me know about this I have read this hometoolsguide.puzl.com but still waiting for suggestion who has purchased it

Few weeks ago, when I was making a little renovation of my bathroom, I've decided to change my old boiler as well, and you know what, this resource called builderandengineer helped me in understanding some features about boilers, which manufacturers produce nowadays, and explained everything about boiler interlocks. You should check it out, it's really helpful.

We put Broan heater/exhaust fan/light units in the ceiling of our baths. Been very happy with them. Nice to quickly fill the bathroom with warm air on a winter morning.