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Question:

How do I use a window A/C unit and Central Air the same time?

We are renting to own a house and do not have much extra money in order to have our cental air unit inspectedThe house was built back in 1940s but the whole downstairs has been remodeledThe bedrooms are upstairs and both have closets that feel like they get up to 90 degrees in the summerwe also have an attic and a very old bathroom up there that never gets cooled off by the central air unitWe keep the thermon 72 and it gets freezing downstairs but upstairs still feel crazy hotShould we shut the vents up there are put in a window unit or will this just mess up our central unit or not even work because of the atic?

Answer:

Some place to sleep, a tent,sleeping bagFood to cook, utensils,stove,way to make a fireWater if none availableChanges of clothes, swim suittowelsWay to wash upExperience will tell you the other things you will need.
Water bottle sunscreen towel bathing suit closed-toed waterproof shoes (like Crocs) bug spray marshmallows instant coffe for the a.m.
The reason upstairs is so hot is because there is no insulation in the attic, sidewalls, and roof which allows the heat to roast you upstairsYou setting the temp to 72 is costing you money that will never get the upstairs coolYou can try this: cold air is heavier than warm air so open the vents on the second floor and keep the lower ones closedThe cold air will go all upstairs and flow down the stair case to cool the first floorIt will help but you are still going to roast up there, so a portable a/c in the window might be the only way to tolerate itYou should keep this in mind with the fact you are renting to own, that 40 year old house is under insulated at best which will make your heating bills in the winter as bad as your electric bills in the summer because your heat is going to go right out through the roof as it rises to the second floor and then you will be dealing with ice dams in the winter and roof leaksSo freeze in the winter and roast in the summer, pay through the nose for heat and electricmaybe look into a more modern house?

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