Schools
250
BuiltLedger
One school, a day of air.
The same inspection in every building. A robot scans, a PE signs, fixed sensors watch between visits, and it all lands in one record the facilities team and the compliance officer can both use.
Inspected
248
Compliance
97%
Open deficiencies
412
Monitored zones
1,840
Every hour
CO2 in one classroom
CO2 tells you if a room is ventilated. It climbs as the room fills, drops when fresh air keeps up. Here it goes over the line by mid-morning and stays there.
CO2 (ppm)
Occupied hours
1,100 ppm ventilation threshold
Room 109 · Fairwood Elementary · sample day. Peak 1,300 ppm at 09:00.
The twin
The school in 3D
Each room shows its live CO2 and ventilation status, with sensors and units where they physically sit. You see where a problem is, down to the room.
Good < 1,000
Watch 1,000–1,200
Exceeds > 1,200
Room109 · Classroom
CO21,360 ppm
VentilationFail
Served byAHU-2 · MERV-13
Outside air41% of design
EvaluatorPE signed · A. Patel
⚠ Open deficiency · P1
AHU-2 outdoor-air damper stuck closed. OA flow 41% of ASHRAE 62.1 design. Recommend actuator replacement.
The moves
What we check
Seven checks, one standard, recorded once. Robots do the capture. A licensed PE makes the call and signs it.
01
Verifies the filter
Installed MERV rating and condition confirmed at every air handler, against a MERV-13 target and documented per unit.
Filter efficiency
02
Measures the outside air
Direct measurement first. Outside-air flow read at the unit and checked against design ventilation rates, not assumed.
Outside air · airflow · static pressure
03
Reads the room
CO2 sampled in occupied zones, spot at inspection or logged continuously by a fixed sensor between cycles.
CO2 monitoring
04
Signs to the standard
Compliance with ASHRAE 62.1 and Virginia requirements, evaluated and signed by a mechanical engineer, one of the statute's named evaluators.
ASHRAE 62.1 · PE of record
05
Watches between cycles
In-production fixed sensors stream CO2, PM, and VOC into the platform, so a failing unit is caught in days, not at the next inspection.
Continuous monitoring
06
Rolls to the portfolio
Every finding becomes a prioritized, costed line in a district dashboard, exportable to GIS and the CMMS, and a defensible compliance record.
Deliverables · capital planning
The record
All schools at a glance
One row per school, colored by what matters. Each status comes straight from the readings under it.
| School | Type | Last insp. | Avg CO2 | Filtration | Ventilation | Def. | Status |
|---|---|---|---|---|---|---|---|
| Fairwood Elementary | Elem | 2026-03-12 | 842 ppm | MERV-13 | Pass | 3 | Pass |
| Meadowbrook Elementary | Elem | 2026-03-11 | 690 ppm | MERV-13 | Pass | 2 | Pass |
| Lakeside High | High | 2026-02-27 | 760 ppm | MERV-13 | Pass | 5 | Pass |
| Cardinal Middle | Middle | 2026-03-09 | 1,180 ppm | MERV-11 | Watch | 9 | Watch |
| Fairfax High Annex | High | 2026-03-04 | 980 ppm | MERV-11 | Watch | 7 | Watch |
| Ridgecrest Elementary | Elem | 2026-03-15 | 1,410 ppm | MERV-8 | Fail | 14 | Fail |