I've installed several electric mat systems in previous homes (bathrooms). Generally kept floor at 84, which felt great but could overhear adjacent bedroom (we like bedrooms ~62-65). The problem in this new house is that it won't lose heat as quickly as a standard home (R43 walls, R60 ceiling, triple pane windows with U factor < 0.2, even 0.15). So, the thermostats won't call for much heat, leaving the hydronic radiant to just barely "trickle in" heat, even when very cold outside. Great for energy savings, but a floor temp over 80 will almost always overheat the room. So, water temp may well be only in the 90s. Tradeoffs...
Agree!
I have that exact Multiplus now, in current "multi-shed" build. Awesome little unit. Only time I hear fans is when charging from AC or gen, but load typically only 100-150 watts. Will give it more of a workout in spring/summer when mini split installed in office. I'm just really struggling with this decision, for reasons earlier noted. Need to speak with CurrentConnected soon but don't want to waste their time until they break ground. Well drilled yesterday. 48 gallons/minute at 280 feet. I was ready to do backflips.