Every commercial building now produces more operational data than any team can track by hand — HVAC alarms and setpoints from the BMS, vibration and temperature readings from IoT sensors, work order history inside the CMMS, energy meter readings, and compliance test logs. Facility managers report that most of that sensor data never reaches the maintenance team in a format anyone can act on, because it sits scattered across three or four systems that were never built to talk to each other. A facility data lake fixes that by pulling every one of those sources into a single, queryable layer that both BI teams and maintenance teams can trust. Start a free OxMaint trial to connect your systems into one warehouse, or book a demo below to see the architecture.
What Disconnected Facility Data Actually Costs
None of this data is missing. It is being generated constantly by sensors, controllers, and technicians every single day. The problem is that it lives in separate systems with separate schemas, and nobody has built the layer that reconciles them into one trustworthy source. The numbers below are what that disconnect costs in practice.
Turn Scattered Building Data Into One Trusted Source
OxMaint unifies IoT streams, BMS alarms, CMMS work orders, and compliance logs into a single facility data layer — built for maintenance teams and BI teams to query the same numbers.
Four Layers of Facility Data, One Missing Link
Sensor data does not disappear on its way to the maintenance team — it stalls at a specific handoff between systems. Tracing the path from a raw sensor reading to a completed work order shows exactly where most facilities lose the thread.
What Each System Holds — and Where It Gets Stuck
| System | What It Captures | Where the Data Usually Gets Stuck | What a Data Lake Adds |
|---|---|---|---|
| BMS / BAS | Setpoints, alarms, equipment states | Proprietary protocol, no export path | Normalized alarm history queryable with everything else |
| CMMS | Work orders, asset records, technician logs | Manual entry, inconsistent asset naming | One asset ID linked across every source system |
| IoT Sensor Platform | Continuous vibration, temperature, and usage data | Own dashboard, rarely exported anywhere | Raw streams joined directly to maintenance history |
| Energy & Utility Meters | Consumption, demand, cost per building or zone | Utility portal or spreadsheet, updated monthly | Real-time cost tied back to the asset driving it |
| Compliance & Test Logs | Water tests, inspections, certifications | Paper or PDF records filed by site | Searchable audit trail across every location |
Stop Losing Sensor Data Between Systems
OxMaint reads BMS, IoT, and CMMS data through native protocol connections and reconciles every asset under one consistent ID — no middleware, no manual re-entry.
Six Data Sources Every Facility Data Lake Should Include
A facility data lake is only as useful as what flows into it. These six sources cover the operational picture most BI teams and facility leaders are trying to reconstruct manually today, usually across several disconnected spreadsheets and portals.
Siloed Systems vs. a Unified Data Lake
The same building, the same sensors, and the same maintenance team can look completely different depending on whether the data behind them is scattered or unified. Here is what changes on each side of that line.
What Data and Facility Operations Leaders Say
Facility Data Lake Software — Common Questions
Build the Data Layer Your Reporting Deserves
OxMaint unifies every source of facility data into one warehouse — so maintenance teams get automated work orders and BI teams get numbers they can finally trust.
