Beefcake,
We have an older house which is very drafty so believe it or not I have to keep 3 running to keep the tank temps consistant! When the wind blows they work twice as hard!
olsenjb,
Mine is a 55 gallon also but luckly enough it rest up against our staircase to the upstairs. I drilled 2 holes in the wall behind my stand and ran the two hoses into the refugium tank which I set up in the cupboard under the stairs (like in Harry Potter). Thanks for the kind words!