It is huge. About 3 feet tall. Anyway, I mentioned the electricity bill to him, telling him it is very high for me, at my old place (which has the same rates) it was much much lower, less than half. At the hydro office, they told me a dehumidifier could cost up to $50/month to run.I told him that and he got mad and told me that it costs $2.00 a month to run. I know he is lying. I think it is completely unfair that I am paying HIS hydro in the basement.He doesn't live here, no one lives in the basement.t is huge. About 3 feet tall. Anyway, I mentioned the electricity bill to him, telling him it is very high for me, at my old place (which has the same rates) it was much much lower, less than half. At the hydro office, they told me a dehumidifier could cost up to $50/month to run.