Heating and air conditioning units

Q:ย It always seems much more humid inside my air-conditioned house than it is outside. The humidity inside is about 35 percent while outside it can be 15 percent. Is that OK, and why does it happen?

A:ย That humidity level is ideal. Your house is usually more humid because itโ€™s all sealed up in the summer, and moisture produced in cooking or running the shower stays locked up inside. Your humidity level in summer could actually reach about 40 percent. If it gets higher than that โ€” perhaps 45 to 55 percent โ€” itโ€™s actually possible that you have too big an air conditioning unit and it isnโ€™t coming on and running long enough. In that case, you need to lower the thermostat a couple of degrees. Youโ€™re better off with an under-sized air conditioning unit that runs a little bit longer.

For more do-it-yourself tips, go to rosieonthehouse.com. An Arizona home building and remodeling industry expert for 25 years, Rosie Romero is the host of the syndicated Saturday morning Rosie on the House radio program, heard locally from 8-11 a.m. on KNST-AM (790) in Tucson and KGVY-AM (1080) and -FM (100.7) in Green Valley. Call 888-767-4348.


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