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VRF capacity estimate

Enter your rooms; see the indoor unit size per room, the total load, the outdoor unit size and the connection ratio.

Project details

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Not all rooms peak at the same time (façades, usage hours). The outdoor unit is sized for total load × this factor; move it towards 1 for single-façade buildings or ones fully occupied at the same hour.

Rooms

Factors used
UseW/m²Typical range
Office / workspace115100–130
Meeting room170150–200
Retail170150–200
Restaurant / café dining220200–250
Hotel room10090–120
Residential (living room, bedroom)9580–110
Classroom135120–150
Gym170150–200
Lobby / corridor9070–110

Indoor unit sizes (kW): 1.7 · 2.2 · 2.8 · 3.6 · 4.5 · 5.6 · 7.1 · 9 · 11.2 · 14 · 16 · 22.4 · 28. Rooms above 14 kW are split across several indoor units for air distribution. Outdoor unit kW ≈ HP × 2.8. The connection ratio (indoor total / outdoor) is kept between 50% and 130%. Sizes and limits vary by brand.

How to read it

Total load, connected capacity and the outdoor unit

Room load: area × unit load for the use × region × sun factor. Example: a 40 m² office in Marmara with average sun is 40 × 115 W/m² ≈ 4.6 kW; the next indoor unit size up is 5.6 kW.

Connected capacity: the nominal total of the selected indoor units. It exceeds the total load because sizes are rounded up.

Outdoor unit: the smallest size that covers total load × diversity while keeping the connection ratio under 130%. A very low ratio means the outdoor unit is oversized; a very high one means indoor units can't all run at full capacity together.

This is a preliminary estimate

Fresh air loads, glazing ratios, internal heat gains, pipe length and height-difference capacity corrections, heating capacity checks and brand selection tables are not included. Final selection is made with the site survey and design calculation.

Worth knowing

Around AC and VRF, we also do all of this.

Central control & scheduling After-hours shutdown, setpoint limits, bulk commands. Air quality & monitoring CO₂, temperature, humidity; battery-powered wireless sensors. Maintenance & mobile work orders Checklists, photo-backed completion, entitlement tracking. Predictive maintenance Catch the trend before the fault code. Energy metering & BMS Circuit-level consumption; Modbus and BACnet. Residential blocks Per-apartment control, central monitoring.

Request a quote with your room list.

Use the button on the result panel to attach this list to a quotation request.

Sales & service line · Klimanist +90 216 640 40 47
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