Baseboards to infloor radiant?

[mr.fixit]

I am adding a hot water baseboard loop to my house system(currently using air plennum heat exchanger)I also have a small entry way with a 50 -60 ft. loop of pex in concrete currently on its own zone valve,mix valve and pump.My thought was (maybe I seen it here? can't recall)to run the floor loop at the end of the baseboard loop(20-25 ft.slantfin baseboard)eliminating 1 pump and mixing valve.Question is will there be enough temp drop through the baseboards (180* supply) so the concrete doesen't get to hot? The floor loop is so small even a small pump running seems like overkill.Has anyone measured temp. loss with baseboards?(Probably here if I searched deep enough).By the way the plennum HX stays in place for the below 0 days.I guess it might take some experimenting with the amount of baseboard to get the temp. drop needed. Thanks

 

[btuser]

If you sized the pump correctly to get the delta you wanted then yes you could do it, but an easier way is to use a mixing valve in the field. If you use a thermostatic mixing valve after the baseboard loop it will allow you to use outdoor reset on your baseboard, and keep a constant temp on the radiant. If you're clever you can fit the valve at the end of baseboard.