Worthwhile to Convert Oil Boiler to Propane or Not?
Have just applied for Energy Audit to determine insulation and other needs. House is about 3000 s.f. in NY State. Definitely we have an under-insulated attic. I'm thinking foam.
However, I know my Weil McClain oil-fuel boiler is 20+ and will need replacement (service guy told me a few years back it had a few years of life left).
Trying to assess whether to convert to gas/propane. That would involve removal of current boiler, oil tank (possible) and placement of propane tank, trench, vent etc. I believe I understand most of the issues around that and the retrofitting that would take place afterwards. Also cleaner burning and no yearly service.
Alternative would be replacement with something like Buderus high efficiency oil-fuel boiler (what most around here seem to use).
However, there are so many variables. The fuel supplier gave me a calc of 750 gallons of propane per 1000 s.f. per year to figure propane cost at $2.29 per gallon. The math puts me at approx the same cost as this year's oil oil-furnace bill. Of course there are the global variables and a chance of skyrocketing fuel oil down the road. But I can't believe oil could skyrocket without putting so much pressure on propane that would rise as well.
So wondering whether -- big picture -- the whole fandango of changing out the entire heating system is worthwhile longterm or whether the only non-variables actually are clean burning, no yearly maintenance cost and no tank in the basement.
Any opinions would be incredibly helpful. I'm trying to get as much knowledge under my belt as possible (and navigate financing options) but I can't get a clear picture of cost/benefit for each option. This is only for our heating/hot water. We have electric for cooking.