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Which is better?

Rob T
Rob T Member Posts: 64
two following options is going to help me realize more in savings?

An outdoor reset (Specifically a Honeywell AQ475) or adding a draft hood and damper?

This is on my home system, a 40yr old American Standard atmospheric hot water boiler. The boiler is way oversized from what I can tell. (Approx 170kbtus when heat loss software shows my house at about 65kbtu losss) I also have approximately 60% more fin tube than I need. (Example, in the 14' x 15' master bedroom there is 18' of actual fin tube in the 30' of baseboard.)

So my question is, will regulating the boiler temp according to outside temp be more cost saving than eliminating the heat going out the chimney? (Old MI style basement, stone walls for the most part with a few basement windows in the addition.)

I know that replacing the windows and insulation is going to be the biggest bang for my buck and I am doing that in stages but was just wondering which of the two options above would generate the most savings.



  • Uni R
    Uni R Member Posts: 663


    Which of the two would you still be most likely to use when you upgrade your boiler? I think that vent dampers are standard on all new atmospheric boilers.

    I would get the reset in your case. It has the savings factor combined with the comfort factor since the heating system will be better matching the heating requirements of the house. White-Rogers also has a mechanical unit that is reasonably priced and bulletproof but won't work for DHW very well either directly or indirectly off the boiler.
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