CaptSpiff
Minister of Fire
...It's also clear that the installer prefere to sell you a bigger, more expensive appliance...
I changed from oil to NG in 2000. Had an old 140K btu input oil boiler and had significant pushback when I asked for the smaller 105K btu gas boiler. Guy actually made me sign a paper stating I would not complain in the future about too little heat. He didn't care that I was running a 0.7 gal/hr nozzle in the oil gun for years.
First winter I found the Gas Boiler cycling more than I liked, so I got smaller nozzels from Burnham that got me down to 90K btu input. I should have gotten their 90K unit to begin with.