Any advice picking between Regency 2600 vs 3100 (Cat/Non-Cat). Looking to heat 2800 sq ft house. Great room where wood stove will be installed in is 700 sq ft with ceilings from a low of 12 ft to 17ft high with a ceiling fan to circulate air. Open floor plan for great room, dining area and kitchen (Around 1500 sq ft). Not sure if I should be concerned about cat/non cat stoves and will both give enough heat to keep rooms in low 70's