//best ask your landlord this question..... //
My landlord seems to know absolutely nothing about the house. The house
is a duplex and she said that there is a filter in the floor on the
other side f the house, but isn't sure where the filter on our side
//how old is house? big old grate might be leftover of former heating
IMHO the larger great is a remnant from an older system.We no have
ducts running to registers in each room upstairs and down. And no air
seems to flow through the gate when the heating system is running. If
this is the case (the landlord doesn't know, see above) I should be
able to cover the large grate, correct?
//It's interesting, but one can't tell from the original post if he is
the landlord or the renter.//
I am the renter, by the way.