mistake_not

Thanks for the quick reply @ProDave. Yes S plan and different channels and valves is the plan (and existing set up for HW / CH). Questions were more about manual manifolds Vs electronic as well as WC electric mixers. Also my assumption is it's best to have the UFW all running same flow rate. Heat source is boiler but obviously wil likely change to ASHP in the future as boilers go away.... Can't afford to do entire house in one go, hence going to be mixed rads / UFH for a while.

Hi, Hoping for some design help / thoughts for a planned UFH installation. I have done some searching/ reading on previous posts but still have questions. The context: I am renovating an extending our house, and looking to install UFH downstairs. We are going to dig up the existing floor slab and lay insulation/ screed so we are not dumping heat into the ground (as well as one other insulating changes). Upstairs will remain as rads, but may convert to UFH in the future, however a few rads will always remain. I have been playing around with loopcad, and looks like I will have 3 or 4 loops of 60ish M. The questions: should I aim for the same flow rates across the loops, same length, or something else? Also should I be looking for a specific manifold/ pump design for mixing rads and UFW? I previously had a single loop on my last house with a very small manifold. I just set the mixer to fully open and used a Tado thermostat with WC to turn it on an off which worked ok, but not great as the PiD control couldn't be set manually so would overshoot. Edit: I am planning single zone and all actuators open: so assume I want the same flow rate on all? Thanks for any help / advice. Toby