The problem: Holiday rental guests are on holiday. They are not managing an electricity bill. They leave the AC on when they go to the beach, when they go for lunch, when they go on excursions. This happens on most stays, not a few.
What we found: In warm-climate rentals, AC units commonly run 12–16 hours per day across peak season. A property with no runtime control is effectively paying for four to six hours of daily cooling with no one in the room to benefit from it.
What it means in euros: Unattended AC operation costs €190–450 per unit per season. Across ten rooms, that is €1,900–4,500 lost every summer, not to system failure or high energy prices, but to AC running in empty rooms.
Holiday rental guests leave the AC running when they go out. Not occasionally, but routinely. Across a full season, unattended AC operation accounts for a large share of the €190–450 per unit that operators lose each summer.
What "running AC all day" actually means in a rental
When guests are at home, they adjust. When guests are on holiday, they don't. The dynamic in a short-term rental is fundamentally different from a primary residence: guests are not there long enough to develop habits, they have no financial stake in the electricity bill, and they spend a substantial portion of each day away from the property.
A typical Mediterranean rental day looks like this: guests wake up, cool the room, go to the beach at 10am, return for a long lunch, go back out, return for dinner, go out again, return late evening. The AC that was switched on at 7am runs through all of it: beach absence, lunch outing, evening absence. Nobody turned it off, because nobody thought to, and there was no reason to.
This is not unusual behaviour. It is the default behaviour of guests in warm-climate rentals. The question is not whether your guests do this, they do, but how much it is costing you.
How many hours per day is your AC actually running?
In uncontrolled warm-climate rentals, AC units commonly run 12–16 hours per day during peak season. Of those hours, a meaningful proportion involve an empty property: guests out during the day, between check-out and check-in, or during overnight absences.
The comparison above uses conservative figures. In properties with multiple daily outings and a full peak season, the gap between actual and necessary runtime is larger.
Why guests don't turn AC off when they leave
The instinct is to assume guests forget, and that a reminder in the welcome book would fix it. Operators who have tried this consistently report otherwise.
A guest leaving for the beach at 10am is thinking about sunscreen, towels, and which beach to go to. Switching off the AC requires noticing it is on, deciding to act, walking to the remote, and doing something. None of those steps are automatic. The friction is small but non-zero. The motivation to overcome that friction is zero, the guest does not pay for the electricity.
Even guests who read the welcome book carefully, a minority, return home after a hot afternoon to a room at 28°C and immediately put the AC back on. The pattern reasserts itself within 24 hours of arrival.
This is not a failure of guest communication. It is a structural feature of the rental relationship. Operators who accept this and design around it, rather than trying to change guest behaviour, recover the costs. Operators who keep trying to change guest behaviour do not.
The compounding effect across a season
The daily waste figures above become significant at season scale. A 120-night peak season, four to six hours of daily unattended runtime per room, and the energy cost of a split unit running in warm outdoor temperatures: the arithmetic arrives at hundreds of euros per room before any accounting for overnight waste.
The €190–450 per unit per season that Narveo operators typically recover reflects this compounded daily waste. No single day is catastrophically expensive. Across a full season, the total is.
For a property with ten rooms, the calculation is straightforward: €190–450 per room × 10 rooms = €1,900–4,500 recovered per season. The investment is €690 (ten units at €69). The payback occurs within the same season, often within 30 to 75 days.
What about energy tariffs and AC efficiency?
Operators sometimes focus on switching energy providers or upgrading to higher-efficiency units as a route to reducing AC costs. Both can contribute. Neither addresses the primary driver of high AC bills in warm-climate rentals.
A 20% more efficient AC unit running 14 hours per day still costs more than a standard unit running 9 hours per day. The runtime problem dominates the efficiency problem. Solving the runtime problem first, through automatic limits, gives a faster return and does not require capital expenditure on new equipment.
- Holiday rental guests routinely leave AC running during beach trips, long lunches, day excursions, and evening outings, this is the default behaviour, not the exception
- Uncontrolled rentals run AC 12–16 hours per day in peak season, of which 4–6 hours commonly involve an empty property
- Welcome book reminders and check-in messages do not change this pattern in practice, guests have zero financial incentive to act
- Automatic runtime limits eliminate unattended waste without requiring guest cooperation, awareness, or behaviour change
- The €190–450 per unit per season recovery reflects a full season of compounded daily waste, not a single dramatic event
- Runtime control delivers a faster return than equipment upgrades because it addresses the primary cost driver directly
When Narveo is not the right solution
Narveo is designed for warm-climate rentals where split AC units run continuously through a four-to-six month peak season. Properties in cool climates, where guests rarely use AC during the day, will see proportionally less return. Narveo is not compatible with ducted or centralised AC systems. It is also not suited to owner-occupied properties where usage is self-managed.
Recover €190–450 per room this season.
Narveo auto-shuts off after a set time and prevents extreme setpoints. Guests keep full access to cooling. No app. No WiFi. No installation.
Order now – €69