Gas and Oil Home Heating Furnaces - Radiant Floor heating...mixed zone

I've a forced hot water system and would like to remove a 5' length of baseboard heater and replace with a small length of radiant floor heat tubing (30'-40'). On this zone is other baseboard heaters which would remain and be controlled by the same thermostat. I'm looking for the most simple way to tap into the zone. What are some of the pitfalls to look out for?
TIA
copeecat:

If you don't get an answer here, ask it over on The Wall at heatinghelp.com. Its an all hydronics site.

No, you can't mix radiant floor heating with baseboard heating. Radiant usually operates at 105 degrees F. and the baseboards usually have an minimum operating temp. at 140 degrees F. and a high cut off at 180 degrees F. The operating temperatures are imcompatible. Radiant heating usually runs continuously and baseboards when there's a demand. Though some people like to run the pump continuously and the gas comes on when there is a demand. Because of the different operating temperatures, they would have to be on separate zones.

I'm not an expert but have done some research on mixing hot water baseboard with radiant floor heating and it is do-able. You can find more info at Radiantec's site (they support do-it-yourselfers), but basically they use a mixing valve to step down the temperature for the radiant zone, and leave the baseboard zone at the higher temp. Not sure it's practical in all cases, but it's worth a look.

Thanks All
I'm getting the idea that this may require a flow control valve and a mixing valve, but may be possible
copeecat