Do I obligation a heat filter?
Answers: There is no danger to not have a filter. But it is healthy, keep the furnace working efficiently, and who wishes to be blowing dust all around. They are inexpensive (a couple bucks), simply do it.
Without knowing what kind of heat system you have this is a difficult cross-examine. Newer blower type heating systems hold replaceable filters--easy. Older types may have a radiator type system through which the upper air is filtered. Not too aware with those.
In any crust, why isn't your landlord doing the repair or replacement? It is his place and to his lead to keep it up. Please don't grant you signed a lease that says you are responsible for upkeep and repairs.
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