The best replacement for forced air is central air.

The best alternatives to forced air are rated as following:
★★★★★  central air
★★★★★  heat pump
★★★★  boiler
★★★★  baseboard
★★★  radiant
★★★  radiator
★★★  radiant heat
★★  hot water heat
★★  hydronic
★★  radiant heat cost
★★  gas heat
★★  radiant floor heat
★  baseboard heating
★  convection heaters
★  central heating
★  radiator heat
★  geothermal
  hot water
  boiler heat
  steam heat
  central heat

Your alternative for forced air is not listed? Suggest!
Speaking about forced air, one probably shouldn't forget about boiler.

Other search terms related to forced air and their ratings are:
★★★★★ boiler
You have in mind a companion for forced air and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of forced air in all years. Click on graph for more.
forced air
central air
heat pump