by HVAC Builder
Open this system in HVAC Builder Load it into the 3D builder, adjust it to your project, and solve it against your own climate — or drop it into a building model and simulate a full year.
The plant a European house runs on: an outdoor coil taking heat from 7 °C air, a scroll compressor, a coaxial condenser heating a water loop, a circulator, and radiators giving it to the room. The radiators are a **hydronic emitter** — rated the way EN 442 rates one, an output at 75/65/20 °C and a characteristic exponent, with no geometry, because that is what a radiator maker publishes. They are deliberately oversized, which is what a heat-pump installer does: 34 kW at the EN 442 rating for a house that wants 12, so the machine settles at 47 °C water and a COP of 3.34 instead of the 53 °C and 3.02 that boiler-sized radiators would have forced. Ten per cent of the running cost, bought with nothing but bigger radiators. Published as an example; the figures below are solved from this model.
Example6–12 kW heatingEUExample system. Published by HVAC Builder to show suppliers what their own page looks like. There is no company behind it and it is not a product offer — the specification is generic and the performance is solved from the model on this page.
Solved from this example's own model each time the page loads — the same numbers a supplier's page shows for their machine.
| Component | Kind | Duty |
|---|---|---|
| Outdoor fan | fan | -0.5 kW |
| Outdoor coil (source) | dxEvaporator | 10.6 kW |
| Scroll compressor | compressor | 4.4 kW |
| Coaxial condenser | pipeInPipe | — |
| Circulator | pump | — |
| Radiators (type 33, 34 kW at ΔT 50) | emitter | -14.7 kW |
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