Gas and Oil Home Heating Furnaces - New Boiler

I have a good running hot water boiler is that 16 years old. My question is does it make sense to replace it now with a higher efficency boiler or wait until it quits on me?

Does anyone have any idea on how much more efficent a new boiler is compared to my old one?

There are several factors one should consider when determining if they should purchase a new energy efficient appliance. The first and foremost is, does the appliance need to be replaced? In your case it does not, however for future reference I will give you the factors you should consider when deciding on an appliance. Let's say a 16 yr. old boiler is 75% efficient and a new one is 90% efficient, the projected savings is approximately 20%. Your annual gas bill is $1,500./yr. and you have gas cooking, water heating and clothes drying that cost $25./mo. ($25. x 12 = $300./yr) If you subtract this from your annual gas bill ($1,500. - $300. = $1200.) you get your annual heating bill. The projected saving on your energy bill is $240. ($1,200. x 20% = $240.) The energy conservation centers at Utilities use default tables to determine the efficiency of the type and age of your unit. If you were to contact them and ask them what your savings would be if you got a new efficient boiler, they would access your billing history and apply basically the same calculations as above. However, I'm the type that if it ain't broke, don't fix it. There are so many other ways to reduce your fuel bill.