How much does it cost to replace steam radiators with forced hot water heaters?

Are you considering this in a residence? A friend of mine converted a residential steam system with cast iron radiators to hot water for child safety reasons. It all worked, but he had to deal with some water leaks at joints in the radiators. That was a nuisance. The amount of heat delivered to the house will be different with water, but I can't remember if the radiators are oversized or undersized after conversion. In his case it heated fine. Call a professional.

EPM