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Mod/Con Heat Exchanger Designs
As this heating season is easing up a bit (I hope!) I'm looking to replace my W-M CGi with a mod/con this summer.
Seems there are 3 main heat exchanger designs out there right now:
1) Fire tube ala Triangle Tube and Lochinvar
2) Giannoni ala Burnham Alpine and Lochinvar Cadet
3) Aluminum ala WM Ultra and Buderus
It is a little confusing to consider these choices.
I read a lot of negative things about the Giannoni type exchanger, yet US Boiler continues to sell many boilers with that design and has a new model coming out (K2) that appears to use the Sermata made Giannoni as well. If it is so horrid a product, why would they subject themselves to service headaches?
I read some good and some bad about aluminum heat exchangers, yet I think WM is on the 3rd generation of its Ultra model. Aluminum exchangers seem popular in Europe. I am sure that WM would not continue to advance the Ultra design if it was costing them a lot of money in replacement exchangers.
No one seems to have a beef with the fire tube designs. Foolish to look at the other designs with this heat exchanger out there?
I'd appreciate any thought on the different styles of heat exchangers and what you guys have encountered in selling and servicing them. I'm sure there are other homeowners that have similar questions.
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