The French made Noirot is nice looking and has a life time warranty. Plus I understand it has a thick heating element which has a lower temperature so won't cause burnt smell.

But how does it save power cost when compares to other similar type of heaters? Say a Goldnair panel model. The sales people told me Noirot will cost me 27c per hour while others cost me more than 54c. She showed me a booklet to back up that point. 

If it is that efficient then I think the 4X price is worthy. But how panel heaters have different efficiency?