I've decided to install the pex tubing for my radiant floor heating system in my new home, to be clear-a contractor is going to make all the connections and plumb in valves, headers, etc. I'm just doing the tubing. After alot of searching it seems as if there's a huge divide in regards to the use aluminum heat transfer plates. It seems to be agreed that they do improve efficiency and make a difference but a varied opinion on whether you'll notice or have any problems without them. I'm hoping for any suggestions that would help make a decisions. I live in northeast, will be heating with geothermal heat pumps at 120 degrees, upstairs will be under carpet. 1st floor a combo of carpet and hardwood.
Also trying to determine the best method for new construction, I'm planning on attaching to sub-floor from underneath but I read about the "sandwich" method which seems easier to laydown but labor intensive and expansivene due to the keepers that would have to be installed. Also the thought if installing a floor over top terrified me.