New HVAC Technology
How it works
Four steps. No BMS required.
No step uses BMS data, damper feedback, or CO₂ proxy. DVM relies only on physical atmospheric tracer concentrations measured in place.
MONITORStep 01
Outdoor reference
Local outdoor atmospheric tracer concentrations are sampled continuously to establish the diurnal reference cycle for each site.
continuousSENSEStep 02
Indoor measurement
Portable Poppy sensors placed in the breathing zone of each area record the same atmospheric tracer species at matched cadence. No BMS hookup.
continuousCOMPAREStep 03
Cycle differencing
The delta between outdoor and indoor cycles (amplitude, phase, and damping) is proportional to how much outdoor air the zone is actually pulling in.
per zoneSOLVEStep 04
OA intake rate
Poppy resolves the zone-level outdoor-air intake rate — CFM and CFM/SF — and compares it to the ASHRAE 62.1 zone target.
updated hourlySystem specs
System parameters.
Sensing
| Medium | Multi-species atmospheric tracer concentration (outdoor + indoor) |
| Placement | Breathing-zone portable sensors, Poppy-maintained |
| Coverage | Zone-level — one station per monitored area |
| Connectivity | Cellular uplink · no BMS, no Wi-Fi required |
Reference
| Outdoor source | Local ambient monitoring at site |
| Cadence | Continuous — diurnal cycles resolved |
| Synchronization | Outdoor and indoor sampled at matched timestamps |
Analysis
| Model | Cycle-matching of outdoor vs. indoor atmospheric tracer concentration |
| Output | OA intake rate per zone (CFM, CFM/SF) |
| Comparison | Zone target per ASHRAE 62.1 Table 6-1 |
| Savings | Weather-normalized per IPMVP Option B |
Deployment
| Timeline | Screening call → 2–4 week assessment → 72-hr report |
| Tenant impact | None — sensors are passive and in-room |
| Integration | No BMS, damper feedback, or VAV command data used |
| Ongoing | Continuous monitoring + drift alerts post-tuning |
Why DVM
DVM vs. common alternatives.
Every common approach infers outdoor-air delivery from commands or occupancy proxies. DVM measures the physical outcome.
| Dimension | DVM | BMS inference | CO₂ proxy |
|---|---|---|---|
| Primary signal | Atmospheric tracer-cycle match (direct) | Damper position (inferred) | CO₂ rise (proxy) |
| Measures actual OA? | Yes — directly | No — commanded, not delivered | No — estimated from occupancy |
| Zone resolution | Per breathing zone | Per VAV | Per sensor |
| BMS required | No | Yes | Sometimes |
| Continuous | Yes — 24/7/365 | Yes (but inferred) | Yes (but indirect) |
| ESG / IPMVP-defensible | Yes — weather-normalized | No | No |
70% of air consumption runs below the DCV threshold.
Demand-Controlled Ventilation cuts outside air when CO₂ climbs above its threshold. The problem: in most commercial buildings, roughly 70% of total air consumption occurs below that threshold — so DCV never engages on the majority of the operating envelope. DVM measures what you actually deliver, whether CO₂ is high or not.
FIG.02b · COVERAGE OVER 24H OPERATING WINDOWthreshold = 1000 ppm CO₂The only thing that matters is what happens in the breathing zone.
Not what the rooftop schedule says. Not what the DCV algorithm assumes. Not what the commissioning report logged three years ago. The occupied breathing zone is the whole point of ventilation, and it's the only place performance can be verified.
Get started
Request a method brief or start a DVM assessment.
30-minute screening call. If your building qualifies, we deploy DVM sensors at no cost and deliver a 72-hour zone-level report before any setpoint change.
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