weed steamer

Similar to houses that have central vac I want central weed steamer hook ups. If my flower beds had weeds I could hook the steamer hose and nozzle up anywhere in the yard and go around and just steam the heck out of any weeds. No chemicals, no flame, just steam.
Would a separate hot water heater get hot enough to steam weeds. Could I get a boiler that would do the job? I think steam is the best way to go. Hot low pressure, but would produce enough stem to work well.