Looking at Central Boiler and my worst case heat demand is about 94k btu. My current oil boiler is 100k. I'm looking to get a 12 hour burn time at the minimum. Should I go with the 1400 with 72k over 12 hours or the 2400 with 125k btu capability. If I go with the 2400 I can also heat a 25x25 garage later on. EPA also lists the 2400 as a cleaner burning boiler. In addition it holds more water, 340 vs 200 gallons. I rather go larger, but I hear that over sizing is not efficient. I could also hold out for the 1450, which supposedly will put out a little more btu. But it's not EPA approved yet. Also has anyone seen stack temperatures on these units? Called CB and the sales guy didn't know. Considering this brand because I got two dealers within 30 minutes. Looking at some other options as well, but living in Mass it limits my option to EPA phase 2 outdoor units and ASME indoor units. Any advice?