Catch HVAC failures weeks before they happen.
Pure software that reads the data your building already collects. It finds faults early and prices every fix in dollars.
real equipment faults caught in one university campus building. The building's own alarms caught 0.
median earlier warning than the commercial platform already watching a university chiller plant
expert-labeled real fault events from operating buildings used to test our detection
false alarms: fewer than one alert per unit per week, so every alert is worth reading
All results measured on real building data the buildings already collect. No new sensors or hardware installed.
Most buildings are paying for faults nobody can see
Commercial HVAC rarely fails out of nowhere. Valves stick, dampers seize, coils foul, sensors drift. The building keeps running, quietly wasting energy, until something finally breaks. The building's alarms are built to catch failures, not the months of degradation before them.
- Roughly 40% of commercial air handlers operate with at least one active fault (LBNL and industry research)
- 15 to 30% of commercial HVAC energy is wasted on faults nobody has detected
- On one university campus building, confirmed faults sat invisible for five months on average
- Scheduled maintenance checks equipment on a calendar, not when the data says something changed
One university campus building: 20 field-confirmed faults, scored against the building's own alarm history.
Illustrative Wattnest fleet view: prioritized faults, per-unit health, and daily cost impact.
Software that turns building data into a repair plan
Wattnest connects to the building data you already have and turns it into a short list of what to fix, in what order, and why it's worth it.
No hardware. No sensors. No controllers. If your building collects data, Wattnest can read it.
Built for the people who keep buildings running
HVAC service companies
Run data-driven service instead of calendar-driven truck rolls.
- Know what's wrong before the truck leaves the shop
- Prioritize the fleet by dollars at stake, not by who called last
- Show every customer what each repair was worth
- Serve more buildings per technician, profitably
Commercial facility owners
See what your buildings and your service contracts are really doing.
- Portfolio-wide visibility into equipment health
- Early warning before failures disrupt tenants
- Every open fault priced in dollars per day
- Verified energy savings for every completed repair
From the research lab to the service truck
Wattnest didn't start as a maintenance company. It started with a question about what building data could do, and 200+ conversations that changed the answer.
Research roots, 2025
We began in building-energy research, working on load flexibility with Lawrence Berkeley National Laboratory: teaching buildings to shift when they use energy.
200+ customer-discovery interviews
Conversations with facility managers and HVAC service companies kept surfacing the same, more basic problem: equipment faults sit undetected for months, and nobody can say what they cost.
The pivot
So we rebuilt Wattnest around that problem: software-only fault detection and predictive maintenance that runs on the data buildings already have. No hardware to install, nothing new to maintain.
Today
We're backed by Berkeley SkyDeck (Batch 22), NSF I-Corps, and the UC Santa Cruz Carbon Fund. We've analyzed a full season of data from a university campus building, validating detection on real equipment using only the data the building already collects.
Supported By
Backers, research heritage, and startup programs
We're backed by the UC Santa Cruz Carbon Fund, and our early-warning research began at Lawrence Berkeley National Laboratory.
See what your buildings already know
Send us three months of building data. We'll send back every fault we find, each with a dollar figure.