Any Lennox Brentwood owners out there? I am looking to replace my existing open-air fireplace with and EPA model. I was thinking about the RSF Opel 3, but the price seemed a little steep to me. My dealer recommended the Brentwood so I am trying to figure out how it compares with the Opel 3. As far as installation goes, the dealer said he would install an AC chimney pipe as opposed to an ASHT (solid pack, more expensive) pipe. With the Central Ohio climate, will I be OK with and AC pipe? Thanks for any insight!