For the weather in my local area, I guess that a boiler furnace is best! While a gas furnace uses air to distribute heat throughout the house, a boiler uses water; The advantage of water is that it heats up faster and retains heat longer; Rather than blowing hot air into a room and having it rise straight up to the ceiling, the boiler radiates heat into the air.
This avoids chilly spots, drafts and stratification.
The temperature from floor to ceiling remains within many degrees of the temperature control setting. The pipes that circulate the water create a closed loop system, requiring no new water to be added! It eliminates the introduction of contaminants into the breathing air, however a gas furnace uses HVAC duct which is often overrun with mold growth, decomposing rodents, dust, dander and bacteria. The HVAC duct commonly sacrifices up to 30% of the heated air to holes and leaks and the seams. That doesn’t happen with a boiler. This category of system also offers versatility. A boiler can be connected to any combination of radiators, baseboard furnaces and radiant flooring. All many of these possibilities are lovelyly clean, totally silent and especially energy efficient. They are unobtrusive and don’t require furniture to be arranged to accommodate them. The radiant flooring device is totally concealed beneath the carpet, tile, hardwood or virtually any kind of floor. A boiler can also provide towel warmers, heat the swimming pool or heat the hot tub. It can provide hot water for a snow melt system installed beneath outdoor walkways, driveways and the garage floor, eliminating the need for plowing or shoveling.