System Specification
Engineer-led precision cooling
specification, in writing.
A senior cooling engineer specifies the topology, load schedule, redundancy class, bill of materials and commissioning plan for your room — manufacturer-agnostic, ASHRAE TC 9.9 and AS/NZS 5149 compliant, signed off by an ARC-licensed practitioner. One business day to confirm scope, five business days to deliver standard rooms.
What you receive
A complete cooling spec,
not a quote.
Six discrete deliverables, written, signed and version-controlled. Use them as the basis for procurement, tender response, capital approval, or as-built handover documentation.
01 / 06
Sensible heat load schedule
kW per rack, per row, per room. Includes diversity and growth factor.
02 / 06
Compliance statement
AS/NZS 1668.2, AS/NZS 3666, AS/NZS 5149, ASHRAE TC 9.9 mapping.
03 / 06
Topology recommendation
DX vs CDW vs CHW with cost / risk / service-life trade-off table.
04 / 06
Redundancy class
N, N+1 or 2N with documented assumptions and single-points-of-failure list.
05 / 06
Bill of materials
CRAC units, condensers, controls, humidifiers, accessories — model numbers, serials, lead times.
06 / 06
Commissioning plan
Pre-commissioning checks, factory tests, on-site IST, refrigerant log, handover pack.
Methodology
Six engineering steps,
in order.
The same methodology we apply on every specification, from a 4 kW comms room to a 2 MW Tier-III data hall. Repeatable, documented, and aligned with ASHRAE TC 9.9 and the AS/NZS 5149 series.
Room characterisation
Use case (production data hall · comms room · medical IT · industrial process), compliance class, square area, ceiling void, raised-floor depth, perimeter wall U-value and incoming services.
Sensible heat load schedule
Per-rack IT load profile + lighting (10 W/m²) + occupants (75–100 W ea.) + envelope gain. Industry-standard multipliers applied per ASHRAE TC 9.9. Outputs a kW sensible load with diversity factor.
Topology selection
DX (R-410A / R-32 / R-454B), CDW (condenser water), or CHW (chilled water) chosen against the kW load, available services, and roof / yard space. In-row vs perimeter vs RDHx for high-density.
Redundancy & airflow strategy
N, N+1 or 2N derived from uptime tier requirement. Hot-aisle / cold-aisle, containment, blanking, plenum vs raised-floor return. Containment opening / leakage analysis where containment is in scope.
Manufacturer & BoM
Vertiv Liebert, Schneider Uniflair, Stulz, Daikin Applied or Mitsubishi Heavy — selected against capacity, footprint, control system and warranty pathway. Full bill of materials with model numbers and serials.
Commissioning & handover
Manufacturer-aligned commissioning plan, refrigerant logbook, AS/NZS 5149 compliance certificate and ARC-licensed sign-off. Handover pack with as-installeds, control narrative and maintenance schedule.
What we need from you
The shorter the gap between intake and start,
the faster the spec lands.
If you have it, send it. If you don’t, we’ll book a 30-minute call to walk through it. Either way, the engineer assigned to your spec is the same engineer who’ll commission the system.
Send your intake- 01Room area (m²) and ceiling height
- 02Per-rack IT load profile (kW / rack and rack count)
- 03Existing infrastructure: power topology, available chilled / condenser water, roof access
- 04Required uptime tier or redundancy class (N, N+1, 2N)
- 05Refrigerant constraints (R-410A / R-32 / R-454B / chilled water only)
- 06Manufacturer or warranty preference (if any)
- 07Operational constraints: noise, perimeter access, hot-work permits, after-hours work
Initial response
< 1 business day
Intake confirmation, engineer assignment, scope letter.
Standard rooms
5 business days
Server rooms, comms, medical IT and small halls (≤ 500 kW).
Tier-III / high-density
10 business days
2N halls, GPU / AI rooms, multi-room precincts.
FAQs
Specification service questions, answered.
How long does a specification take?
Standard server-rooms and small data halls (≤ 500 kW IT load) — five business days from receipt of intake. Tier-III / 2N data halls and high-density / GPU rooms — 10 business days. Initial response and intake confirmation always within one business day.
What does it cost?
A written specification is provided at no cost when it leads to a quoted supply / install / service engagement. For standalone consulting (specifying a system you intend to procure or install elsewhere), we quote a flat engineering fee per room based on complexity. Either way, the scope and price are agreed in writing before work starts.
Do you specify against a particular manufacturer?
No — the specification is brand-agnostic. We recommend the manufacturer that fits the load, footprint, refrigerant constraint and service-life expectation. We hold service relationships with Vertiv Liebert, Schneider Uniflair, Stulz, Daikin Applied, Mitsubishi Heavy, and Climaveneta, and can specify against any of them.
Can the specification feed into your installation team?
Yes. Once the specification is signed off, the project flows into our OPUS project-management platform with full traceability — purchase orders raised against the BoM, commissioning plan loaded into the schedule, and ARC-licensed technicians dispatched. The same engineer who signed the specification owns the project through commissioning.