ᐅ Underfloor Heating: Length of Heating Circuits

How long would the experts here recommend making the individual heating circuits for the underfloor heating?

I need about 1350-1400 m (4400-4600 ft) total length. With 12 heating circuits, that still results in roughly 112 m (370 ft) per loop. Is that too long or acceptable?

Can anyone estimate the pressure loss over 112 m (370 ft) of 16x2 mm (5/8 x 1/16 inch) pipe?

There are experts who can do the calculations for this. Pressure loss depends on many factors and cannot be answered in a general way. However, 112 m (367 feet) of 16 mm (5/8 inch) pipe is already borderline.

I have actually read everywhere that a heating loop should not be longer than 100 meters (330 feet), and I have followed this guideline.

Brevity is the soul of wit!

I use 80m (260 feet) ±10% for all loops. Avoid especially long loops, particularly in rooms with high heating demand, such as bathrooms.

Have a professional evaluate it.