Combatting the hot weather

The cold weather and the high costs of heating are finally getting to me.  After a particularly cold and rainy summer season, the fall temperatures were so low that I was forced to fire up the furnace too soon.   I first turned up the temperature control and activated the furnace over Labor Day weekend. Since then, its been running steadily. For the past six months I’ve had the windows closed tight, and the same stale air has continued to circulate.  My home feels unpleasantly dry, musty and dirty. No amount of cleaning or dusting seems to make any difference. The furnace is blowing dry, dusty air into every single room, day after day. Without ventilation, there’s no way to freshen up the house.  I have considered contacting a Heating, Ventilation and A/C contractor and investing in some type of air quality accessory. I’ve done research into multiple whole-home air purifiers, humidifiers and ventilation systems. I’m not sure what type would be the best.  I’ve got airborne contaminants, a lack of humidity, fumes, and overly stale air. I know that any of these products would greatly improve the comfort and health of my home, while also trimming my energy bills. I just keep thinking winter has got to be nearly over.  It’s the middle of May, and the weather should be warming up. I’m hoping to open the windows and solve the problem. But still, the outside temperature is consistently in the mid-thirties, and I’ve got not choice however to keep running the furnace. With the high cost of monthly utility bills, I’m reluctant to spend even more money on indoor comfort.