Is purposely under-sizing a wood insert a mistake?

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MattyCee

New Member
Jan 23, 2025
1
Hartford, CT
We're in a 1950s 2300 sqft 2-story Colonial with a masonry fireplace and want to generate more heat than we get from the fireplace (which isn't much!) and prevent the heat loss we have now. Given the dimensions of the house and fireplace (41w x 29h x 21d), two contractors have recommended large units like the Regency cx2700 and Osburn Matrix 2700.

Realistically, we won't be burning wood every day and expecting to turn off our furnace for the winter. This will be for more casual use. But I'm concerned that with an insert that size the heat output would make our 15 x 25' living room almost unbearably hot.

Does running smaller fires defeat the purpose and efficiency of having a large insert? Would we be better off putting in a smaller unit?

We don't have any experience with these so I'm hoping to get input from you all. Thank you!
 
It will depend on a few factors like heat loss due to large windows and poor insulation, higher ceilings will raise the room volume to be heated, and the ability for the heat to reach other parts of the house. How open or closed off is the living room from the rest of the house on that floor? Is there a stairwell open to the living room?
 
Realistically any modern insert can provide at least 10x the heat you get from an open fireplace.
I don't think that you can go wrong with big or small, small fires in big insert or running a smaller one 24/7. Any modern insert will be a huge improvement, and I believe either could probably make the room unbearably hot with the fan running.

Unbearably hot can be really nice for a while sometimes!
 
You can always build a smaller fire in a large stove, you can't do the same for a smaller insert.

It maybe that you start burning and like it and go full time, if you stick with a smaller insert you will be feeding it wood more often and not like it as much.

Fans can be used to move the air around, that is what most do.
 
Blaze King 25 insert?