Was wondering what others thought here. So I installed some dual pex flex recently for my boiler, which is a just over 1” ID. My thought is to install 1 1/4” pex inside the house also because the inside diameter would be similar. And the fittings for that would actually decrease that a little more. Is it worth it to install the 1 1/4” inside the house or am i over thinking this? All my fittings i have now are 1”, but if its worth it i could spring for the 1 1/4”. I thinking flowing the extra BTU’s couldn’t hurt. Tell me your thoughts. Inside pex will be about 80 feet total. Total run from stove and back will be about 160 feet, including inside.