[Declanomous]

Yeah, exactly. I like to have it relatively cold at night, so with forced air I set the heat to come on about 15-20 minutes before I want to get out of bed, and turn off 15 minutes after I leave for the day.

With radiant heat, if I want it to be 55 while I'm sleeping, and 70 when I leave my bed, my heat will come on 2 hours before I'm going to get up, and the temperature will slowly increase over that time, leading to it being far too warm about an hour before I intend to get up. The heater turns off as the house gets up to temp, but the radiators thermal mass is such that they are still quite hot when I leave for the day, in effect heating the house long after I've left.

Furthermore, it's basically impossible to have zone heat with one-pipe systems, and it's much more difficult with two pipe systems. (This is less of a problem with hot water though).

With forced air, you can install active vents fairly easily, and while you still can't cut off TOO many of the vents at once, lest you cause too much back-pressure in the system, it is fairly easy to heat one side of your house or one floor of your house.

On top of all that, steam doesn't handle short-cycling well, so you have to accept a wider swing in temp than you do with forced air.

[Retric]

Significantly overshooting the temp is something you can avoid. The thermostat needs more information, but predicting the temperature in 10 minutes if the heat is turned off now is not that complex.

Ex1: https://www.heat-timer.com/steam-outdoor-reset-2/ Ex2: https://nest.com/support/article/What-is-True-Radiant#how-it...