My dear old grandmother always kept a cast iron water kettle on her wood stove in the kitchen and one on the potbelly stove in the living room to keep the home humidity higher in the winter time. It adds to the comfort level and her good wooden furniture would not dry out and split. By keeping the humidity higher in winter the home does not have to be heated nearly so much as the humidity equates to “latent heat”. The same reason humidity works against us in summer it works for us in winter. Ive seen where some units are run in “fan” mode only just to circulate and filter the indoor air.