Vahtii watches over your building.
Steady heat, steady hot water, good indoor air.
Installed without renovation or downtime. It starts with a two-week survey. All data in Finland.
Vahtiiheat.water.cold.air.
Vahtii
Heat
Lowering the temperature is the single most effective way to save energy, and Vahtii can do that too. But the saving also comes from tuning and from empty spaces, without anyone being cold. Less than by lowering, and without anyone noticing it. The temperature only comes down in spaces that are too warm and in empty ones, never in a space that is in use.
Water
Apartment-level water use is measured and reported to the resident and the owner in near real time. Billing rests on measured consumption, and a leak is noticed the same day. When a resident sees their consumption straight away, they also see where it comes from.
Cold
Refrigeration runs on electricity all year round. It has no break the way heating does, so even a small unnoticed fault adds cost continuously. The compressor and the condenser have to work harder, and it may go unnoticed because nothing raises an alarm. Vahtii sees the change in how the unit behaves, and says what is worth checking.
Air
Duct pressure, temperatures and run times were set at commissioning, and they are probably right. Vahtii measures whether the unit stays within them, and whether reheating and cooling are running at the same time. When everything is in order, the indoor air stays good and no energy is wasted.
A verified saving
26 %
less heating energy, saving 189 MWh a year
Measured at a pilot site in the winter of 2025–2026 and normalised with Finnish Meteorological Institute heating degree days: consumption is converted to a normal year. A mild or a cold winter does not distort the comparison.
How it works
The plant can be sound, the sensors in order and the alarms silent, and still more energy goes in than the building needs. Then the fault is in the control. It is not a sign of a fault to come, it is the fault itself, and it may have been there since commissioning.
Control is the part nobody inspects, because it looks like it is working. A wrong setting does not show up as a fault.
Vahtii measures what the plant actually does and shows it precisely, and after that the settings go right the first time.
Once the settings are tuned, the same measurement carries on in a second job. Normal is now known, so a deviation stands out. A device that has started behaving differently shows before anything becomes urgent.
The same method works for cold and for water. In a shop's or a hotel's refrigeration, defrost cycles and compressor runtime are tuned so that goods stay cold on less electricity. For water, apartment-level consumption is measured in real time and shown to residents and owners as it is.
Contact
We will tell you what is worth measuring first in your building.
