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.
A packaged rooftop for a VAV floor: outside-air damper with an economiser and demand-controlled ventilation, DX coil on an inverter scroll, an electric heater for morning warm-up, and a supply fan that holds a duct static as the boxes throttle; the boxes themselves live on the building. Published as an example; the figures below are solved from this model.
Example85–125 kW heating + coolingEUExample 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 |
|---|---|---|
| Outside-air damper: 24 % OA, economiser, DCV, 06–18 | damper | 0.0 kW |
| Return damper | damper | 0.0 kW |
| DX coil | dxEvaporator | 112.1 kW |
| Electric heater (warm-up) | heater | 0.0 kW |
| Supply fan (duct static 150 Pa) | fan | -4.2 kW |
| Inverter scroll (8 modules) | compressor | 26.7 kW |
| Air-cooled condenser | condenser | -137.5 kW |
| Condenser fans (2) | fan | -3.6 kW |
Every air-coil refrigerant circuit here is reversible, so this machine is also a heat pump. Solved with the circuit running backwards at the standard air-to-air heating rating point — outdoor 7 °C dry bulb / 6 °C wet bulb, indoor 20 / 15 °C (EN 14511) — not at the supplier's own design conditions above, so the two ratings can be compared across machines.
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