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mod/con boiler?

Mitch_4
Mitch_4 Member Posts: 955
in THE MAIN WALL
Depending on your system there are a couple options.

In a smaller load (say 40-50Mbtu) single baseboard loop, I recommend a fixed rate condensing boiler and outdoor reset.

The cost savings modulating from 25-50 would be a long payback for the extra technology required in modulation.

Using a small condensing boiler, and an outdoor reset to modulate your water temperature is simpler in design, cheaper on installation costs, and you ge the benefits of condensing technology 90% of the time. (I typically lower the high limit on fixed input units to 160 and still have no trouble.)

Now if you have a larger system with many zones, or are looking to zone you home to 3+, then a small mod con will make sense because the load varies as more zones go on and off line.

Find a pro, ask questions, and if unsure of the reply post it here, you will get the help. don't ask about prices though..local conditions will affect that

Comments

  • Jim_83
    Jim_83 Member Posts: 67


    I’m planning on replacing my heating system. I’ve read a lot on this site about mod/con boilers like the Vitodens 200 and they seem to be the most energy efficient.

    In floor radiant is not an option for my house.

    Are mod/cons an appropriate boiler to use with either baseboard radiators or radiant panels? I’m concerned because of the low operating temperatures of the mod/cons and how the low temperature would work.

    I realize the baseboard radiators or radiant panels would have to be sized appropriately for the lower operating temperature.

    Would a regular high efficiency boiler be more a cost effectiveness than a mod/con?
  • Dorothy_2
    Dorothy_2 Member Posts: 7
    What boilers are out there that

    condense but don't modulate?
  • Dorothy_2
    Dorothy_2 Member Posts: 7
    What boilers are out there that

    condense but don't modulate?
  • Roland_4
    Roland_4 Member Posts: 84
    MOD/CON

    Educate yourself and find a good heating tech. How much efficiency can you afford? As stated earlier, consider the amount of time to pay for the efficiency increase.

    http://www.hpac.com/Issue/Article/24498/24498
  • Mitch_4
    Mitch_4 Member Posts: 955
    Non modulating Condensing boilers

    Personally I use the Olsen in Canada. In the USA they are the Utica UB90 series, and the Dunkirk Q90. made from 50,000 - 200,000 input in 25k increments

    Google any of the company names for their websites.

    I have had great success with the 50 and 75 for retrofits up to about 3000 sq ft homes usually.

    Mitch
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