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Need help with heating & hot water setup for tight space

Hi. I'm new to the forums here. I am in need of some help/input, any feedback is MUCH appreciated.

My situation:

- 1200 square foot condo apartment in Brooklyn, NY. On 2nd floor of a 4 floor building. Major heat loss is 2 exterior walls, all other walls touch 'warm' living spaces.

- Boiler closet within apartment is 36" wide, 31" deep, 7' high.

- Gas connection

- Current setup is a wall mounted atmospheric boiler. 100,000 BTU. Made by Myson, Apollo model. Completely dead now. Domestic hot water is from an indirect tank, 36 gallons. Made by Crown. Only 2 years old, still works fine. I'd like to keep/reuse the indirect tank if possible, will replace if I have to.

- Nobody makes a wall mounted atmospheric boiler these days. They don't exist. All wall mounted boilers have to be direct vented. I can't install a direct vent. So I have to use a normal cast iron floor boiler.

- I can't find a boiler + indirect tank combo that will fit within the tight space constraints I have. I've been looking at a bunch of 80-100,000 BTU boilers, none are small enough to fit along with an indirect tank.

- I can't install the indirect tank above the boiler, the walls are not strong enough to support it.

- If I can't fit an indirect tank along with a new boiler on the floor, I'm considering an external tankless coil. There's one made by TFI EverHot: <a href="http://www.tfi-everhot.com/ExternalTankless_2008.html">http://www.tfi-everhot.com/ExternalTankless_2008.html</a>. I'm looking at the 4 GPM or 6 GPM, which are small/light enough to fit in my boiler closet along with a new floor boiler. Does anyone know this company? Are they reputable? Will these units really deliver that amount of domestic hot water output? If so, for how long?

- I realize the external tankless coil solution is not the most energy efficient. It will also require an additional circulator pump, and I'll probably want a priority valve for when the heating system is on AND I need hot water at same time. The units don't seem to be insulated very well, I'm concerned about the heat loss and constant firing of boiler to keep the tankless coil hot. So all in all, I don't love this solution. But I can't find another option. Or is this option not so bad in reality, and I should just accept it?

Like I said, any feedback and suggestions are MUCH appreciated. I've been stuck with no hot water for 1 week already, I really need to find a solution and have it installed.




  • STEVEusaPA
    STEVEusaPA Member Posts: 6,505
    I have some ideas

    But I'm on the road, typing on my phone. But someone will pop on to help you.

    Energy kinetics and Buderus make boilers that stack on top of an indirect.

    I also can't believed, no mater how poorly insulated, you need 100,000 btus for 1200 sq ft, only exposed on 2 sides.

    Some wall mounts can use the same venting you're using now.

    If no one responds, I'll get back on tomorrow.

    There was an error rendering this rich post.

This discussion has been closed.