How do I comparison shop for a new furnace?

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• BOSCH Greenstar Combination 131 Wall-mounted Condensing Boiler
• VEISSMAN Vitodens Combination 100-W wall-mounted condensing boiler
• RINNAI Combination i120CN Condensing Boiler

Here are the nitty gritty details in case it's a factor, listed from most to least expensive, although with only $ difference, price doesn't seem to be the most important variable:

My trusty s furnace is finally getting replaced after years of service with a combination heat and hot water boiler. The heating company I've chosen has given me three options from different manufacturers, and I'm finding myself at a loss for how to choose between them. Are there unbiased review sites for this sort of stuff? My point of contact is trustworthy, but the purchase is a hefty chunk of change and I want to do my own independent research in order to make a decision.

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I agree that your space may be a bit small to justify a condensing boiler.

I'm using a New York Thermal modulating fully condensing boiler in my garage, but it's bigger, has a bonus room above and I'm using the same boiler for one zone in my attached breezeway. The smallest unit they have is rated at 100,000 BTU's and would likely WORK fine, as it is modulating (will run as low as 15,000 BTU's per hour and throttle from there as needed)...but a lot of green for your application.

Regarding the condensate. I did the no-no everyone pointed out and ran mine out the wall with an overflow plumbed in that would allow the condensate to just run out on the floor if the line ever froze. Garage floor with floor drain about 6 feet away.

In southern Indiana, it froze up once or twice every winter and made a bigger mess than what you might think even with the floor drain. Really, who wants to see a puddle on the floor of a new garage?

When I recently redid my garage sink, I ran the overflow to my sink drain. One less thing to worry about.

Phil

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