Placa de transferencia de calor PEX – lámina extruida o de aluminio?

We are retrofitting an existing house with radiant heat under the floor. From my research, it seems clear that we should install aluminum heat transfer plates, but I haven’t been able to determine if it’s worth investing in an extruded aluminum C-shaped heat transfer plate (omega o or U-shaped) on top of a metal plate. Even if bought in bulk, extruded sheet is about 3 times more expensive than sheet metal.

A useful study was carried out in 2013 comparación de la distribución de temperatura de aluminio extruido y placas en forma de U. La conclusión más importante que obtuve de ese artículo fue que la placa extruida tenía una distribución de calor desigual pero una temperatura de agua de retorno más baja (bueno para la eficiencia). Supongo que la pregunta principal es si el aumento de la eficiencia es suficiente para compensar el costo adicional por adelantado..
Placa de transferencia de calor PEX

Me doy cuenta de que hay muchos factores que pueden afectar el desempeño energético de una casa en particular, and we will work with the local heating company to determine the setup of the system. I’m hoping someone with experience with both boards can give us a feel for how much different extruded boards are compared to aluminum boards.

If we were using sheet metal, my hunch would be to use the omega shape, considering there is more contact between the metal and the pipe. Sin embargo, I’ve also heard that the sheet metal makes noise when the pipe expands as it heats up, and I’m wondering if there is more room in the U-shaped channel for the pipe to expand without affecting the surrounding metal. Any thoughts on this?

For extra background, we plan on 1/2PEX, two lines between the joists (16C), insulated from below. Hardwood (oak) floors above, small rugs. We haven’t decided on the water heater.

PEX heat transfer plate installation video