Vertiv 7902E-MC29-B 29kW Precision Cooling Unit with iCOM Controls
The Vertiv 7902E-MC29-B is a precision cooling system rated at 29 kW (91.4 kBtuh) net sensible capacity, built for data center rows, server rooms, and high-density IT environments where stable temperature and humidity control is non-negotiable. With R-410A refrigerant, variable-speed EC fans, and Liebert iCOM unit control, the 7902E-MC29-B is engineered for continuous-duty operation and energy-efficient modulation — not a one-speed-fits-all approach.
Overview
Precision cooling at this scale (29 kW sensible / 31 kW total) is a different discipline than comfort cooling. Data centers generate heat that HVAC systems aren't designed to handle at the density or duty cycle required. The 7902E-MC29-B addresses this with upflow and downflow airflow configurations, a 4,300 CFM fan array, and a controls platform — Liebert iCOM — that integrates with broader data center infrastructure management (DCIM) environments. At 79 inches tall and built to Vertiv's Liebert product line standards, this unit fits standard data center floor plans. For buyers evaluating precision cooling solutions or comparing within the Vertiv product catalog, the 7902E-MC29-B sits in the mid-to-large capacity tier of the Liebert ES series.
Key Features
- 29 kW Net Sensible Capacity (91.4 kBtuh): Sensible cooling — not total capacity — is what actually removes heat from IT equipment. At 26.8 kW net sensible (91.4 kBtuh), this unit is sized for mid-to-large server room rows or a dedicated high-density rack cluster. The gap between net sensible (26.8 kW) and total capacity (31 kW / 105.9 kBtuh) accounts for the refrigeration cycle overhead — plan your IT load around the sensible number.
- Variable-Speed EC Fan Capacity Modulation: Electronically commutated (EC) fans adjust speed in response to actual load rather than cycling on and off. In practice, this means lower energy consumption during partial-load conditions (nights, weekends, shoulder seasons) and reduced acoustic output — a meaningful factor in co-location or mixed-use spaces.
- 4,300 CFM Airflow: Rated airflow of 4,300 CFM supports row-based cooling configurations. Higher CFM means more heat can be moved per unit time — but also that return air path design matters. If your hot-aisle/cold-aisle containment isn't tight, that airflow budget gets wasted on mixing.
- Upflow and Downflow Airflow Modes: Both upflow (raised-floor) and downflow (overhead return) configurations are supported, which means this unit can be deployed in raised-floor legacy data centers or in more modern slab-floor environments with overhead cable trays and return plenums — without requiring a different model.
- R-410A Refrigerant: R-410A is the established HFC refrigerant for precision cooling at this capacity class. It operates at higher pressures than legacy R-22 but provides better heat transfer efficiency. Note that R-410A phase-down timelines are active in some regulatory jurisdictions — confirm local requirements for long-term fleet planning.
- Liebert iCOM Unit Control: The iCOM platform provides local and networked control, sensor integration, and alarm management for the unit. It's the same control architecture used across the broader Liebert ES and CRV product lines, which simplifies multi-unit management and integrates with Vertiv's Environet and third-party DCIM monitoring platforms. iCOM supports coordinated control across multiple units in the same row — reducing simultaneous compressor starts and improving redundancy behavior.
- 79-Inch Height Form Factor: At 1,970 mm (approximately 79 inches) tall, this unit aligns with standard 42U rack heights and fits within typical data center floor grids. For data center cooling planning, confirm the floor-to-ceiling clearance and any hot-aisle containment panel heights before specifying.
Integration and Compatibility
The Liebert iCOM control system on the 7902E-MC29-B supports integration with building management systems (BMS) and DCIM platforms via standard protocols. The unit is designed for use within Vertiv's broader precision cooling ecosystem, which includes complementary units, economizers, and monitoring software. When deploying multiple units in a data center row, iCOM's coordinated control capability allows units to share load and manage redundancy without manual intervention. For facilities already running Liebert precision cooling — see Liebert cooling units — the iCOM architecture is a direct fit into existing management workflows.
Frequently Asked Questions
Q: What is the net sensible cooling capacity of the Vertiv 7902E-MC29-B?
A: The 7902E-MC29-B delivers 26.8 kW (91.4 kBtuh) net sensible capacity. Total capacity is 31 kW (105.9 kBtuh). For IT load planning, use the net sensible figure — it represents the actual heat removal available for IT equipment.
Q: Does the 7902E-MC29-B support both upflow and downflow airflow configurations?
A: Yes. The unit supports both upflow and downflow airflow directions, making it compatible with raised-floor environments as well as slab-floor data centers with overhead return plenums.
Q: What refrigerant does the 7902E-MC29-B use?
A: The 7902E-MC29-B uses R-410A refrigerant. Buyers planning long-term fleet deployments should verify current and upcoming R-410A regulatory timelines in their jurisdiction.
Q: What control system does the 7902E-MC29-B use?
A: It uses the Liebert iCOM Unit Control platform, which provides local and networked management, alarm handling, and multi-unit coordination. iCOM integrates with Vertiv Environet and supports BMS/DCIM connectivity.
Q: What is the airflow rating on the 7902E-MC29-B?
A: Nominal airflow is 4,300 CFM, delivered via variable-speed EC fans that modulate based on actual load — reducing energy use during partial-load operation.
Q: How does the 7902E-MC29-B fit into a standard data center floor plan?
A: The unit is 79 inches (approximately 1,970 mm) tall, aligning with standard rack heights. Confirm floor-to-ceiling clearance and hot/cold aisle containment geometry before finalizing placement.
The spec that drives most 7902E-MC29-B purchase decisions is the 26.8 kW net sensible figure — and buyers frequently conflate that with the 31 kW total capacity number. For IT thermal planning, only the sensible capacity matters: that's the actual joules-per-second you're pulling out of the airstream for your servers. The 7902E-MC29-B lands in the right range for a dense 10–15 rack row at moderate per-rack loads, or a smaller cluster running high-density compute.
Technical Highlights:
- Variable-Speed EC Fans at 4,300 CFM: Most of the operating hours in a data center are at partial load — EC fan modulation means the 7902E-MC29-B isn't running flat-out during those hours. Real-world energy savings on EC-driven precision cooling units are measurable, especially in environments with variable IT load profiles.
- Liebert iCOM Multi-Unit Coordination: When you deploy more than one unit in the same row (N+1 or 2N), iCOM's coordinated control prevents simultaneous compressor restarts and balances load across units — issues that single-unit controllers can't handle and that catch facilities teams off-guard during failover events.
- Dual Airflow Direction (Upflow/Downflow): Supporting both modes in one SKU gives procurement flexibility without maintaining two model families. If your facility transitions from raised-floor to slab-floor in phases, the 7902E-MC29-B doesn't need to be replaced — just reconfigured.
Deployment Considerations:
- The 4,300 CFM rating assumes clean return air paths. In partially contained hot-aisle environments, effective airflow delivery drops measurably — commission airflow measurements before signing off on cooling adequacy.
- R-410A regulatory phase-down is in progress in multiple jurisdictions. If this unit will be in service beyond 2030, verify refrigerant availability and servicing cost projections for your region before committing to a large fleet deployment.
The 7902E-MC29-B is the right specification for a mid-density server room or co-location row where iCOM integration is already in use and the facility team needs a unit that can coordinate with neighbors — not just cool in isolation. Standalone single-row deployments in new slab-floor builds are where this unit's dual-direction airflow and EC modulation pay off most directly.
