Data Analytics report
Annual AC Cost for the Four Rooms
Booking-led heating and cooling estimate for the four enclosed Traunsee Escape rooms in Gschwandt.
Executive Summary
- Expect roughly €700Source: Traunsee Escape annual AC operating-cost model–€1,000Source: Traunsee Escape annual AC operating-cost model net per year for AC electricity. The planning case is €714Source: Traunsee Escape annual AC operating-cost model for 3.1 MWh, with only the four enclosed rooms conditioned around bookings.
- Carry €1,800Source: Traunsee Escape annual AC operating-cost model net per year (€150Source: Traunsee Escape annual AC operating-cost model/month) in the operating budget initially. That is more than twice the planning result and protects against a colder hall, longer preheating and weaker real-world efficiency.
- The extreme stress case is about €2,600Source: Traunsee Escape annual AC operating-cost model net per year. It combines a 4Source: Traunsee Escape annual AC operating-cost model °C winter hall, 75%Source: Traunsee Escape annual AC operating-cost model utilization, full design airflow, weaker insulation and lower heat-pump efficiency.
- Cooling is not the cost driver. With no direct solar exposure, heating and warm-up account for most annual energy; summer cooling remains concentrated in occupied rooms.
Booking-led zoning keeps the expected bill low
The result assumes each indoor unit runs only when its room has bookings, with a setback between uses. It does not assume that the four rooms or the 355 m² hall are held at comfort temperature all week.
The €714Source: Traunsee Escape annual AC operating-cost model planning case is the working expectation. The €226Source: Traunsee Escape annual AC operating-cost model lean case shows the lower boundary if the hall stays comparatively warm and utilization is light. The €2,600Source: Traunsee Escape annual AC operating-cost model case is deliberately stacked against the project and should be treated as a stress test, not as the forecast.
| Scenario | Annual cost | AC electricity | Delivered heating | Delivered cooling |
|---|---|---|---|---|
| Lean | 226 € | 1,129 kWh | 2,977 kWh | 320 kWh |
| Planning | 714 € | 3,103 kWh | 8,785 kWh | 442 kWh |
| Cold / busy | 2,602 € | 9,293 kWh | 23,798 kWh | 1,041 kWh |
Scenario assumptions and annual result
| Scenario | Utilization | Winter hall floor | AC electricity | Annual net cost |
|---|---|---|---|---|
| Lean | 30%Source: Reviewed annual HVAC scenario rows | 11 °CSource: Reviewed annual HVAC scenario rows | 1,129 kWh/aSource: Reviewed annual HVAC scenario rows | 226 €Source: Reviewed annual HVAC scenario rows |
| Planning | 50%Source: Reviewed annual HVAC scenario rows | 8 °CSource: Reviewed annual HVAC scenario rows | 3,103 kWh/aSource: Reviewed annual HVAC scenario rows | 714 €Source: Reviewed annual HVAC scenario rows |
| Cold / busy | 75%Source: Reviewed annual HVAC scenario rows | 4 °CSource: Reviewed annual HVAC scenario rows | 9,293 kWh/aSource: Reviewed annual HVAC scenario rows | 2,602 €Source: Reviewed annual HVAC scenario rows |
The building shell is favorable, but the new room walls are still an assumption
The venue certificate supports the low-cost direction: average shell U-value 0.26Source: Gillesberger 2023 energy certificate W/m²K, exterior walls 0.15Source: Gillesberger 2023 energy certificate, roof 0.11Source: Gillesberger 2023 energy certificate and ground floor 0.31Source: Gillesberger 2023 energy certificate. It records 4,021Source: Gillesberger 2023 energy certificate heating-degree days, a −14.4Source: Gillesberger 2023 energy certificate °C design temperature and 49.7 kWh/m²a reference heating demand.
Scaling 49.7 kWh/m²a to 190 m² gives a useful 9.4 MWh thermal heating anchor. The bottom-up planning model produces 8.8 MWh, which is close enough to pass a reasonableness check despite the different room-in-room geometry and intermittent use. The new drywall U-value of 0.45Source: Gillesberger 2023 energy certificate is not measured and must be replaced by the final assembly.
Weather basis
The monthly profile uses 8,760Source: European Commission JRC PVGIS TMY API documentation hourly observations from the European Commission JRC PVGIS typical meteorological year for the exact site coordinates. The dataset reports a 451 mSource: European Commission JRC PVGIS TMY API documentation model elevation, closely matching the certificate's 449 mSource: European Commission JRC PVGIS TMY API documentation site elevation, and 3,787Source: European Commission JRC PVGIS TMY API documentation degree-days at an 18Source: European Commission JRC PVGIS TMY API documentation °C base.
Most AC electricity is spent from October through March
The planning case averages €59Source: Traunsee Escape annual AC operating-cost model/month, but that average hides the seasonality. Typical winter months are around €80Source: Traunsee Escape annual AC operating-cost model–€100Source: Traunsee Escape annual AC operating-cost model; June through August are only about €14Source: Traunsee Escape annual AC operating-cost model–€15 because the rooms are inside the insulated hall and have no direct solar gain.
This is also why multi-split heating capacity should be selected for the coldest occupied hour, even though annual electricity use is modest. Peak kW and annual kWh are different questions.
| Month | Net AC electricity cost | AC electricity | Heating electricity | Cooling electricity |
|---|---|---|---|---|
| Jan | 100.3 € | 436 kWh | 408.1 kWh | 0 kWh |
| Feb | 92.2 € | 400.9 kWh | 372.9 kWh | 0 kWh |
| Mar | 88.5 € | 384.9 kWh | 356.3 kWh | 0.7 kWh |
| Apr | 43.7 € | 190.1 kWh | 155.7 kWh | 6.4 kWh |
| May | 58.7 € | 255 kWh | 223.4 kWh | 3.7 kWh |
| Jun | 14.8 € | 64.4 kWh | 10 kWh | 26.5 kWh |
| Jul | 15.1 € | 65.5 kWh | 9.7 kWh | 27.8 kWh |
| Aug | 14.4 € | 62.5 kWh | 8.2 kWh | 26.3 kWh |
| Sep | 31.5 € | 136.9 kWh | 97.8 kWh | 11.2 kWh |
| Oct | 76.8 € | 334.1 kWh | 304.1 kWh | 2 kWh |
| Nov | 82.8 € | 360.2 kWh | 331.6 kWh | 0.6 kWh |
| Dec | 94.8 € | 412.4 kWh | 384.4 kWh | 0 kWh |
The flagship uses the most energy; the party room is intermittent
The 70 m² flagship accounts for about €265Source: Traunsee Escape annual AC operating-cost model of the planning result. Each 40 m² small room is about €183Source: Traunsee Escape annual AC operating-cost model. The party room is about €83 because the model carries one party slot per operating day and conditions it on fewer days, even though its occupied airflow and people load are high.
Planning-case cost by room
| Room | Area | AC electricity | Annual net cost |
|---|---|---|---|
| Flagship | 70 m²Source: Reviewed Planning scenario room rows | 1,152.3 kWh/aSource: Reviewed Planning scenario room rows | 265 €Source: Reviewed Planning scenario room rows |
| Small A | 40 m²Source: Reviewed Planning scenario room rows | 794.3 kWh/aSource: Reviewed Planning scenario room rows | 182.7 €Source: Reviewed Planning scenario room rows |
| Small B | 40 m²Source: Reviewed Planning scenario room rows | 794.3 kWh/aSource: Reviewed Planning scenario room rows | 182.7 €Source: Reviewed Planning scenario room rows |
| Party | 40 m²Source: Reviewed Planning scenario room rows | 361.9 kWh/aSource: Reviewed Planning scenario room rows | 83.2 €Source: Reviewed Planning scenario room rows |
Use €0.23Source: E-Control Gewerbe-Strompreis-Monitor, August 2026/kWh net as a planning rate, not a tariff quote
E-Control's August 2026 commercial monitor shows material variation between providers and consumption bands and includes energy, grid costs, taxes and levies. The model therefore uses a transparent €0.23Source: E-Control Gewerbe-Strompreis-Monitor, August 2026/kWh net planning rate and tests €0.20Source: E-Control Gewerbe-Strompreis-Monitor, August 2026–€0.28Source: E-Control Gewerbe-Strompreis-Monitor, August 2026. The actual business contract and meter profile can move the euro result even when physical consumption is unchanged.
Recommended next steps
- Carry €1,800 net/year for the four-room AC electricity line until the first winter.
- Place a temperature logger in the unheated hall for one cold week; this is the most valuable missing input.
- Give the contractor the final wall/ceiling build-up, 1,050–1,200 m³/h simultaneous airflow case, room schedule and the −14.4 °C design temperature.
- Ask the quote to state room-by-room heat load, low-temperature output, SCOP, minimum modulation and standby power.
- Sub-meter both outdoor units and replace the estimate after the first full heating season.
Further questions
- Will rooms be brought to temperature only for bookings, or held at 15–18 °C throughout every operating day?
- What is the actual insulated drywall and ceiling specification?
- How warm does Hall 2 remain in an unheated January week, including heat from neighboring units and the floor below?
- Will ventilation be demand-controlled by room CO₂, or run at full design flow whenever any room is occupied?
- Is reception added to the same multi-split operating-cost line later?
Caveats and assumptions
This is a planning estimate, not a statutory heat-load calculation, energy certificate for the tenant unit or equipment quote. It excludes reception, conditioning the unused hall, ventilation-fan electricity, maintenance and demand charges. It assumes heat can be delivered by the multi-split in winter without material resistance backup. The 14 August decision to use concealed ducted indoor units has not yet been recalibrated for the selected units' fan power and external static pressure. Room construction, hall temperature, operating hours, actual occupancy, fresh-air control, refrigerant layout and selected-unit performance can all change the result.
Sources
- Traunsee Escape annual AC operating-cost model
- Reviewed annual HVAC scenario rows
- Reviewed monthly Planning scenario rows
- Reviewed Planning scenario room rows
- Gillesberger 2023 energy certificate
- European Commission JRC PVGIS TMY API documentation
- E-Control Gewerbe-Strompreis-Monitor, August 2026
- Traunsee Escape 24-month financial model
- Traunsee Escape heating, cooling and ventilation plan