So what are my options. Block up open stairway (I’ve attached a pic). Block up open stairway and put in door. Leave open but fit a cornice on the ceiling to deflect warm air back down. Fit some sort of fan to blow warm air back down. Block off vent above ceiling. Leave vent and somehow get access and fit insulation. Click to see full answer. In this manner, how do you stop heat going upstairs?Use negative ventilation to move heated air out of the downstairs and vent it outside. Mount window fans to circulate air out of the house from the downstairs. Open upstairs windows to facilitate the air circulation, and the negative ventilation achieved downstairs will literally pull the upstairs air downward.One may also ask, why is it so hot upstairs but cold downstairs? Poor attic insulation, leaking air ducts and blocked soffit vents can also cause your home to have hot upstairs and cold downstairs. To check if your attic has sufficient insulation or not, look out for attic floor joists. If you can see any joist then your attic is not properly insulated. Just so, how do you force cool air upstairs? Place fans at the bottom of the stairs pointing upward, sending cool air on the first floor upstairs where you need it. If you have ceiling fans in second floor rooms, turn them on. They will circulate air and make you feel cooler. Switch them off when you leave to avoid wasting energy.How do you keep your upstairs from getting hot in the winter? Some common reasons that your second floor is too hot include: Hot Air. Keep in mind, that heat rises. Hot Roof. Ductwork, Insulation and Seals. Redirect airflow to the second floor. Change filters. Insulate and ventilate the attic. Insulate windows. Change the fan setting on your thermostat from “auto” to “on”

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