I am purchasing a new home, and designing some renovations to several rooms. The house has a gas boiler and radiators throughout the house. For the kitchen and upstairs bathroom, I will be putting in tile flooring. To save space, I am wondering if installing PEX tubing for radiant floor heating using the supply and return from the radiator is a possibility. Can this be simply installed in place of a radiator, or does the entire radiant floor heating system (thermostats, control modules, etc.) need to be installed as well?