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[coolidge]

Is there a benefit to running hotter water in a boiler? I know it takes more wood to get it there, but if you had 195 high point and 175 low wouldn't you be able to extract more usable heat than 160?

[hondaracer2oo4]

What are you running for a heat source? Forced hot air, baseboard, radiant etc?

[E Yoder]

Higher temp water has more available btu's, but you may not need to transfer more btu's... It's all in type and sizing of emitters. Higher temp water allows for smaller emitters, but creates more dramatic temperature swings in the house. Stack temps would climb a bit with hotter water, with a small loss in efficiency, also greater heat loss in underground piping. ...
If you're aiming for max comfort in theory an outdoor reset to drop water temp down in milder weather would give constant circulation and even temps.
It's a long discussion and as Honda said depends on the heating system. 

[coolidge]

I have mostly radiant, with small amount of baseboard. Not really needed here.

[Smokeless]

With temp gauges on the back of my g-200 I will see temp up to 195deg on the supply.(when it is running)  If your system is correctly installed there should be no reason to turn up the furnace temp.

[tinfoilhat2020]

my last home had radiant baseboard heat and I ran my temps at 175-190 to keep the water hotter in the baseboards.. you would be surprised what an extra 10 degress of water will do as far as BTUs....for forced air now im comfortable running the factory 160-180

[hondaracer2oo4]

If you are running a majority of radiant then you shouldn’t gain anything from going up in temonsince your radiant runs at almost half those temps. Baseboard though increases btu output a lot as temp rises. Search google for slant fin btu chart.