Will radiant heating on porcelain ceramic floor of bathroom raise the market value of house?

Adding an electric radiant heating on flooring is an option in remodelling a bathroom.
By how much will it increase the market value of the property?
Any disadvantage of radiant heating on floor?

View this post on my blog: http://madeinhome.info/will-radiant-heating-on-porcelain-ceramic-floor-of-bathroom-raise-the-market-value-of-house