Refrigeration &
Air Conditioning Specialists
Commercial refrigeration, air conditioning, cold rooms, freezer rooms, ventilation and planned maintenance for businesses across the UK.
Approved Partner & Installer for Leading Manufacturers
Engineered cooling for mission-critical environments
From single-cabinet installs to nationwide rollout programmes — every project delivered to manufacturer standards.
Commercial Refrigeration
Display cabinets, multidecks, serve-over counters and bespoke refrigeration systems engineered for retail and hospitality.
Air Conditioning
VRF, VRV and split systems for offices, retail and commercial buildings — designed for efficiency and year-round comfort.
Cold Rooms & Freezer Rooms
Modular and bespoke cold and freezer rooms with precision temperature control for food, pharma and logistics.
Service & Maintenance
Planned preventative maintenance and 24/7 emergency call-outs that keep your critical systems running without downtime.
Trusted by businesses that can't afford downtime
Every installation, service and call-out is backed by certification, insurance and a national engineering network.
Emergency Response
Average call-out response across the UK, day or night.
F-Gas Certified
Fully compliant engineers registered and certified.
Fully Insured
Comprehensive public liability cover for every project.
Nationwide Coverage
Commercial engineers deployed across the country.
Manufacturer Approved
Official partner status with leading brands.
Energy Efficient
Typical energy saving on optimised systems.
Projects engineered to perform under pressure
Regional Distribution Cold Store
"Delivered ahead of schedule with zero disruption to our operation. Faultless."
Real engineering, on real sites
A look behind the scenes at our technicians delivering commercial refrigeration and HVAC works across the UK.
Ceiling Void Survey
Precision measurement of joist and insulation voids before ductwork installation.
External Condenser Mount
Cantilevered bracket installation for a commercial split-system condenser.
Indoor Unit Service
Decommission and internal component inspection on a wall-mounted unit.
Mezzanine Ductwork Refit
Scaffolded access works during a full HVAC and ceiling refit programme.
Condenser Coil Deep Clean
High-pressure wash down of an external condenser housing to restore airflow and efficiency.
Facades & Fan Units
Controlled spray cleaning of rooftop AC equipment and surrounding building fabric.
Pressure Washing Service
Targeted jet-wash of coil faces and housings to remove debris and biological growth.
Rooftop AC Servicing
Full maintenance routine on a commercial condenser — coil flush, chemical treatment and inspection.
On-Site Engineer
Kold Star branded engineer carrying out a scheduled clean-down on a rooftop condenser bank.
Kold Star Mobile Engineer Van
Our fully branded Renault Trafic service van — on the road to commercial sites across the UK.
Finding faults, fixing them properly
Real diagnostic work from live call-outs — refrigerant circuits, ice faults, blocked ducts and electrical traces, resolved by qualified engineers.
R600a System Diagnostic
F-Gas qualified engineer inspecting a flammable-charge refrigeration circuit with a manifold gauge set.
Wall Unit Fault Trace
Diagnosing an indoor split-system unit and its control wiring during a no-cooling call-out.
Iced Expansion Valve
Heavy frost build-up on a brass valve assembly — a classic sign of a restricted or under-charged circuit.
Blocked Ductwork
Debris and obstruction found inside flexible ducting — the hidden cause of poor airflow and overheating.
Live Fault Diagnosis
Footage from a real call-out — tracing and resolving a refrigeration fault on a live system.
A decade of engineering commercial cooling
Kold Star is a specialist commercial refrigeration and air conditioning company delivering installation, service and emergency response for businesses that depend on reliable temperature control.
Precision
Engineered to exacting tolerances and manufacturer standards.
Transparency
Fixed quotes, clear timelines and honest communication.
Compliance
Fully certified, insured and audit-ready on every job.
Partnership
Long-term PPM relationships, not one-off transactions.
Founded
Kold Star established as a specialist commercial refrigeration provider.
F-Gas Certified
Achieved full F-Gas company certification and Refcom registration.
Nationwide Expansion
Engineering network scaled to cover commercial clients across the UK.
Manufacturer Approved
Granted approved installer status with Daikin, Mitsubishi & Carrier.
1,000th Project
Completed our thousandth commercial installation nationwide.
24/7 Response
Launched round-the-clock national emergency response division.
Let's engineer your next project
Tell us about your site and requirements. We'll come back with a fixed quote and a clear timeline — usually within 24 hours.