There really is no such thing as a "boiler furnace." You either have a boiler or a furnace.
With a furnace or warm air system, air is used to conduct heat from the furnace to rooms in the house. Air is warmed as it passes over a heat exchanger, and then blown throughout the house by a motorized blower. Sheet metal ducts channel the heated air to various areas of the house, and the heat enters each room through registers. Boilers, or hydronic heating systems, use heated water to supply heat to the rooms in the house.
Boilers send steam through pipes to steam radiators or hot water through baseboard radiators, radiant floor systems, snowmelt systems or pool heaters. Weil McLain can assist you in choosing the correct boiler or furnace for your home.