Heat pumps and modern boilers want a low return temperature. This course is about designing the rest of the system so they get one — and so the house still gets warm.
Everything the course covers, module by module.
→ Why the return temperature, not the flow temperature, decides how efficiently a system runs
→ Sizing emitters at 45 °C instead of 75 — what happens to the radiator schedule, and what it costs
→ Design ΔT, flow rates and the pipe sizes that follow from them
→ Cylinders for a low temperature source: coil surface area, reheat times and the legionella requirement
→ Hydraulic separation — buffers, low loss headers, and when you genuinely need one
→ Mixing old and new: radiators, underfloor and a heat source that wants one temperature
→ Weather compensation, controls strategy and commissioning a system that has to run cool
The working half of the course is open to everyone, no account needed: one task for every lesson, including thirteen design boards. Build up a U-value and watch the insulation do almost all of it, work a room heat loss element by element, size a radiator at 45/40 and find out why the bathroom needs three times its heat loss in catalogue output, calculate a cylinder reheat and see what keeping the old coil costs, size the pipes and the pump on one real house — and then run a design clinic on five systems that are not performing, one of which turns out not to be a fault at all.
One in-depth article per module of this course, free to read, each ending in a 10-question mock test. They cover the same ground as the lessons, so you can see exactly what the course teaches before you buy it.
Buy this course on its own, or take the full suite and get every course for a year.
53 lessons across 7 modules, 497 practice questions with an explanation on every option, flashcards, key facts, timed module tests and 53 interactive tasks, one for every lesson.
No, and they're designed to sit alongside each other. The heat pump course is about the appliance — the refrigeration cycle, the unit, siting it, commissioning it. This one is about everything downstream of it: the emitters, the cylinder, the pipework and the controls that decide whether the appliance ever gets the low return temperature it needs.
No. A condensing boiler only condenses when its return is cold enough, so a well designed low temperature system is worth real money on gas too. The design principles are the same whichever heat source is sitting at the end of them.
Yes — gas ACS reassessment, unvented hot water, water regulations, heat pumps and solar thermal are all live now, and the full suite unlocks everything for a year at £59.99.