UH-OH...... Looks like it may be time for the "pirate" to start up a 'tuna thread' over in The Game Room forum!!
It depends upon different factors location Maine vs Virginia ,how big is the home how well it's insulated. For me it was 3 ton last year. I burn a bag a day keeps the house a toasty 70* + 1st floor 68* bedrooms 2nd floor.