Heat flux, surface limits, flow temperature and loop lengths for wet underfloor heating, with a worked living room and the bathroom that sets the flow temperature.
Underfloor Heating: Quick Design Rules Read More »
Catalogue radiator outputs are for 75/65/20 °C; at heat-pump temperatures you need two to three times more. Here are the factors and a worked room.
Radiator Sizing: Correction Factors for Low Temperatures Read More »
Find where the heat pump stops coping on its own: a straight-line load and capacity check gives the bivalent point and the backup heater size in minutes.
Heat Pump Sizing and the Bivalent Point Read More »
Size a heating expansion vessel in five steps from system volume, maximum temperature, static height and safety valve setting, with a worked 200 kW example, a quick house check and the site settings that matter.
Expansion Vessel Sizing for Heating Systems Read More »
How to size hydronic heating pipes: water flow from load and temperature difference, velocity and Pa/m criteria, Darcy–Weisbach friction, a worked 200 kW main, and the index circuit that sets the pump head.
Heating Pipe Sizing: Flow, Velocity, Pa/m and Pump Head Read More »
A practical, step-by-step EN 12831 heat loss calculation: design conditions, U-values, thermal bridges, ground and unheated spaces, ventilation, and one living room calculated in full to 904 W.
Heat Loss Calculation Step by Step: EN 12831 Worked Example Read More »