im looking to put another stove in my basement i cannot decide between gas or pellet this stove would be for slight warming but mostly ambiance, if i do gas i can install it on the wall next to furnace so plumbing would be easy but venting would be tricky. can i vent it in furnace chimney? a pellet stove may work on wall just need to run pipe up wall oan out just over foundation. whats up with vent free gas stoves are they any good? thanks