Monitoring for the central cooling plant (Chiller Plant) — chilled-water and cooling-tower ΔT, operational-sequence compliance, and plant efficiency (kW per ton) where the plant is metered. Instruments the building's single largest cooling load and surfaces its operational metrics and alarms; it does not control the plant.
Impact: Turns the building's largest and least-visible cooling load into a monitored asset — efficiency drift, off-sequence operation, and ΔT degradation are caught remotely, weeks before they surface as a comfort failure, a plant trip, or a season of quietly elevated energy.
What it solves: In a chilled-water office building the Chiller Plant — the chillers, cooling towers, pumps, and the chilled-water loop — is the largest single cooling load. Keedian instruments the plant, tracks the evaporator and tower ΔT, scores how well the BMS holds its operating sequences, and — where plant power and chilled-water flow are metered — tracks efficiency as kW per ton against the plant's design. Keedian reads the plant and surfaces the metrics and alarms; the BMS sequence logic and the mechanical plant and its maintenance stay with the customer and the customer's plant-service vendor — Keedian does not stage, reset, or perform mechanical work on the chillers or towers.
These are the operational metrics this add-on monitors and alarms on. Keedian surfaces them and, where the contract includes managed service, triages them; acting on the physical asset stays with you and your vendors.
The core metrics are summarized below. Full methodology, thresholds, diagnosis steps, and escalation criteria are in the Metrics Catalog.
Temperature difference a cooling stage develops across its heat-transfer surface — return vs supply air on an RTU or AHU, chilled-water return vs supply across a chiller's evaporator, or entering vs leaving water on a cooling tower. Measures how effectively the equipment moves heat. A declining or persistently low ΔT is the earliest remote signal of degradation — fouled coils or tubes, low flow, or a failing charge — often visible weeks before a comfort failure or breakdown.
Full detail → Metrics CatalogWeighted score of the six operating sequences the plant's BMS is supposed to hold — a chiller running with its chilled-water pump, its condenser-water pump, and a cooling tower, distribution following production, and everything off together when the plant is off. A low score means the plant is being run out of sequence: auxiliaries burning energy with no chiller behind them, or a chiller running unprotected. Target ≥ 95%.
Full detail → Metrics CatalogThe plant's electrical input divided by its cooling output — kW drawn per ton of cooling delivered, the standard measure of how efficiently a chilled-water plant runs. A rising kW/ton against the plant's own design is the clearest efficiency-drift signal: fouled tubes, low flow, or a plant staged poorly for the load. A monitoring metric — Keedian reports and alarms on drift; it does not control the plant.
Full detail → Metrics CatalogEach metric includes definition, detection logic, diagnosis steps, recommended actions, escalation criteria, and prevention controls. Thresholds are reference values to be calibrated per client.
View Metrics Catalog →The plant runs within its operating sequences (≥ 95% compliance), evaporator and tower ΔT stay in band, and — where metered — efficiency is tracked against design so drift is caught early. Expected (pending validation) — offices have no named Keedian reference deployment yet.
Model A, scoped per building: chilled-water and condenser-water sensing, plus plant power metering and chilled-water flow where kW-per-ton is in scope. In a Model B building the same signals are read from the BMS. No sensor-by-sensor cost modeling — instrumentation is scoped per plant.
The operational-metric alarms in scope are managed on the same 24/7 basis as the rest of the contract — surfaced, triaged, and referred to the customer's plant-service vendor with a recommended action.
Add-on charges apply on top of the base subscription. This page states which charge components apply; the product subscription lives in the pricing catalog.