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Replacing Gas Boiler Questions
We are in the process of replacing a Weil Mclain CG-5 (140,000 BTU/hr) gas boiler. The cast-iron block has a small drip leak and my serviceman after contacting WM for me, believes that this will not be covered under WM's limited lifetime warranty repair since it only covers manufacturing defects and those are only usually found after 10 years and this is a lot older than 10 years. The amount of labor + cost of part would probably be better off to just replace the boiler.
Boiler is hooked up to a WM Indirect HW tank (Plus 60), it is the same age as the boiler.
We live in a 3000 sq. ft house with two-story foyer and family room. Long Island, NY. Have seen temps as low as -10 to -15F in January. 3 zone system. 1 for IHW and a zone to air handler in basement for 1st floor and to attic air handler for 2nd floor. We need to have a 20% glycol mixture in the system due to air handler in attic.
OK, our installer has recommended either replacing just the boiler (and everything around it) with a Peerless MI-05 for lets say $X (not sure if pricing is allowed here). This would hook up to the current WM IDW tank.
For $X + 4500, he suggests the NTI Trinity Ti200c which would do both the heat and HW, so get rid of both the WM boiler and tank. This would include new exhaust routing outside to the side of the house, outside temperature gauge, etc. Installer has said he has installed plenty of these in recent years with no problems.
My concerns are (Trinity):
1. New technology scares me a little, especially at the extra cost. Especially the electronics which are only covered for 16 months under warranty.
2. Having condensate drip from the boiler and have to be pumped outside also is a little worrisome as I have a finished basement.
3. I can't assume my serviceman is never going to retire, so I'm unsure if servicing will be readily available as with a typical cast-iron boiler.
There are some benefits that I can see such as replacing everything at probably an additional $2000 (Note: this takes into account that we probably will have to replace the WM IDW in a few years at a cost of $2000+) with a high-efficient boiler sounds like I could save money in the long run, but the payback seems to be far off. We plan to be in the house at least another 12 years. Also, I'm kind of a tech-geek so this stuff sounds cool.
However, I've seen through research that a boiler hooked up to a IDW is the most cost-effective way to heat water and house. Also, I am assuming that the Peerless boiler is standard fare and could be services by most heating contractors. One concern I have is about only changing the boiler and not the IDW, if I go the Peerless route. Should I do both at the same time?
Thanks in advance...