Summer used to mean full occupancy and healthy revenue for hotels. In 2026, it also means something else: the most expensive electricity of the year, driven almost entirely by one thing – air conditioning. For hotel owners and operators, the question is no longer just “how do we stay cool?” but “how do we achieve real hotel energy savings while keeping guests comfortable?” Across Europe, heatwaves are reshaping how hotels operate, how much they pay for power, and even where and when guests choose to travel. Understanding this shift and automating around it has become a direct lever on profitability and long-term hotel energy savings.
Why this summer’s energy bills look different?
Electricity markets across Europe have already recorded some of their highest-ever daily prices this year, and the timing is not a coincidence. As heatwaves intensified through June 2026, demand for cooling pushed several days to record price levels, while the cheapest days of the year fell during the mild weeks of spring. Cooling demand, not heating, is now the dominant driver of peak electricity prices in large parts of the continent.
This isn’t a temporary spike. In a growing number of countries, the summer demand peak now exceeds the winter one; Greece is a clear example, where tourism and air conditioning combine to push electricity use higher in August than in January. As air conditioning ownership keeps rising across Europe, this pattern is expected to deepen, not reverse, in the coming years.
For hotels, the exposure is direct and structural:
- Energy prices are rising at the same time hotels are running cooling systems continuously for months.
- Staffing shortages are compounding the pressure on operating costs across the hospitality sector.
- Maintenance and service costs are climbing alongside everything else.
The result: even hotels with full occupancy are seeing their operating margins squeezed by costs they can’t fully control except, increasingly, they can. Smart automation is now one of the most effective paths to consistent hotel energy savings.
Air conditioning isn’t optional anymore
There’s a second, equally important shift happening alongside rising costs: guest expectations are changing.
Reliable cooling and comfortable indoor spaces are becoming a genuine booking factor for both leisure and business travelers, not a nice-to-have. Hotels with modern, energy-efficient cooling systems are increasingly better positioned to win bookings, while older properties without effective climate control risk losing market share as heatwaves become more frequent and more intense.
Hotels across Southern Europe are already redesigning entire guest experiences around heat-shifting dining indoors during peak afternoon hours, expanding shaded and air-conditioned rest areas, and adjusting excursion timing. Renovation budgets are shifting accordingly too, with HVAC systems, energy-efficient cooling, solar integration, and automated temperature control now consistently prioritized in hotel upgrade plans.
In short: guests now expect the room to be cool when they arrive and hotels are expected to deliver that without letting energy costs spiral. That balance is exactly where meaningful hotel energy savings begin.
Where the money actually goes
For a typical hotel with a pool, heating, ventilation and air conditioning isn’t just the biggest energy cost it dominates the bill:
- HVAC (cooling and heating): roughly 35–50% of total hotel energy consumption
- Domestic hot water: 15-25%, higher in hotels with heavy shower and bathtub use
- Kitchens and refrigeration: 15-25% in properties with restaurants or buffets
- Pool systems: 5-12% for outdoor pools, up to 20% for heated indoor pools
The takeaway is simple: if a hotel wants to control its summer energy bill and unlock serious hotel energy savings, HVAC is the single biggest lever to pull – and it’s exactly the system most commonly left running inefficiently, in empty rooms, at the wrong temperature, with no automated oversight.
The real cost of “set it and forget it” cooling
Here’s the problem most hotels still face: air conditioning is typically controlled manually, room by room, guest by guest. A window left open with the AC running. A unit left at full blast in a room that’s been empty since checkout. A thermostat set once at check-in and never adjusted again, regardless of occupancy or outside temperature.
Multiply that across dozens or hundreds of rooms, during the exact weeks when electricity is at its most expensive, and the waste becomes a serious line item – not a rounding error. This is precisely the gap that smart room automation is built to close if you want real hotel energy savings.
How smart automation changes the equation
This is where Guest Room Energy Management (GREM) and the EOS Smart Thermostat come in. Instead of relying on manual settings and guest habits, automated systems continuously adjust cooling based on real conditions:
- Occupancy-based control – cooling automatically reduces or shuts off when a room is unoccupied, and returns to comfort settings before the guest returns.
- Open-window detection – the system prevents the classic (and expensive) scenario of AC running against an open window or balcony door.
- Centralized, hotel-wide visibility – instead of managing hundreds of individual thermostats blind, staff and management get a single dashboard showing energy use and anomalies across the entire property.
- Guest comfort, preserved – automation isn’t about making guests uncomfortable to save money; it’s about eliminating the waste that happens when no one, guest or staff is actively managing the room.
This is exactly the model already proven at Le Méridien Lav, Split – a large Mediterranean resort facing the same summer heat and occupancy pressure as hotels across the Adriatic coast. The case study shows what’s possible when energy management is automated rather than left to chance: meaningful, measurable hotel energy savings during precisely the months when energy costs are highest.
It’s not just energy – summer also strains your team
Rising energy costs are only half the summer story. The same peak season that drives up electricity bills also brings the sector’s most acute staffing pressure: more guests, more turnover, more seasonal hires, and less room for scheduling errors or productivity gaps.
This is where time management solutions matter just as much as energy automation: accurate time tracking and workforce optimization help hotels handle the summer surge in guest volume without the labor costs and inefficiencies that come from manual scheduling and paper-based tracking. Pairing energy automation with workforce optimization means both sides of summer’s cost pressure, utilities and labor, are being actively managed, not just absorbed. Together, they compound your hotel energy savings.
The bigger picture: this trend is not going away
The data points in one direction. Heatwaves are becoming more frequent and more intense. Air conditioning adoption across Europe continues to climb. Electricity price peaks are shifting from winter to summer in more markets each year. And guests are increasingly choosing hotels based on comfort and cooling reliability.
Hotels that treat this as a one-season problem will keep absorbing rising costs every summer. Hotels that automate now starting with the biggest energy line item, HVAC turn a growing structural cost into a controlled, predictable one and lock in long-term hotel energy savings.
Ready to see where your hotel is losing energy?
Every hotel’s exposure is different, depending on room count, occupancy patterns, building age, and existing systems. The fastest way to find out exactly how much your property could save this summer and every summer after is a free energy review.
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Spica Hospitality provides smart technology solutions for energy management, access control, and workforce optimization – helping hotels across Europe reduce costs, improve staff productivity, and deliver a better guest experience while supporting sustainability goals and measurable hotel energy savings.