Oil Boiler Replacement

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Nov 5, 2021
87
PA, USA
Hey all. I'm posting this here because I didn't think it really fit in the Boiler Room. My house is about 100 years old. The primary heating system is hot water radiators powered by a oil fired boiler. I added the wood stove a few years ago as a secondary (and cheaper) heating method. My domestic hot water is also heated by the boiler.

Well, said boiler seems to have finally died. It's about 20 years old, and is a Quietside QXM8. It's high efficiency, but Korean made and the company is either gone, or out of the boiler business. The only parts I can find (aside from universal parts like oil nozzles) are NOS on ebay for ridiculous prices. It fires, but then immediately dies and throws an inspection light. I've troubleshot to the best of my ability - replaced nozzle and filters, tested flame detector, etc... but I think its just time to bite the bullet and replace it with something that can actually be serviced into the future.

My plan is to get 4-5 estimates from various recommended local installers. What other things should I be aware of? I'm going to run on the assumption that I should get a thermal loss assessment completed and ignore the sizing of the current unit, because I have no idea if it was properly sized. Anything else? This is my first time going through this, so any pointers would be greatly appreciated. Thank you!
 
Buderus is a good brand with a long history. Weil-McLain too. These match the Quietside QXM8's 85% efficiency. The Energy Kinetics - Resolute EK1R is rated at about 91%, but I don't know what their service history is.
 
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for fun I’d get quote for a pellet boiler if you could take advantage of possible tax credits.
 
Depending if you want to service it or have someone else do it could sway the decision on Buderus. Their tech support will not talk to the general public.