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Est. 1970 — West Yorkshire

Fifty Years of Climate & Refrigeration Excellence

Operating under TEV Ltd, Marstair and Quartz represent the pinnacle of bespoke British HVAC manufacturing—delivering custom air-conditioning, chilled water systems, and cold-chain protection across Europe and the Middle East.

1970s — Origins

Foundations in Refrigeration

Marstair establishes its reputation in West Yorkshire, engineering high-spec cooling for retail cold rooms and cellar environments. A legacy of reliability begins.

Read about our early innovations ↓

From the outset, we prioritized thermal stability. By engineering our own heat exchange coils in-house, we ensured that the Marstair name became synonymous with "fit-and-forget" durability in the UK's most demanding hospitality environments.

1990 — Integration

The TEV Ltd Expansion

Quartz joins the TEV family, merging chilled-water expertise with Marstair's refrigeration pedigree. A singular force in British HVAC manufacturing is born.

Why this merger defined us ↓

Moving production to our dedicated West Yorkshire hub allowed us to integrate the precision of Quartz fan coils with the rugged cooling capacity of Marstair. This cross-pollination of engineering talent allowed us to pivot from simple cellar cooling to mission-critical infrastructure for the IT and retail sectors.

2026 — The New Era

Employee Ownership

TEV Ltd becomes an Employee-Owned company. The team that builds the products now leads the company, ensuring 100% alignment with our clients’ success.

See what this means for you ↓

In 2026, we took the bold step of transitioning to Employee Ownership. When you work with us today, you are collaborating directly with the owners. This isn't just a corporate structure; it’s a guarantee of craftsmanship. Every engineer, technician, and support staff member has a vested interest in the long-term performance of your cooling infrastructure. We are more agile, more committed, and more invested in your outcomes than ever before.

Capabilities & Innovation

Engineered British HVAC Solutions

Explore our specialized product divisions, West Yorkshire manufacturing facility, and strategic commitments to HVAC innovation.

Specialised Cooling Units
Specialised HVAC
Refrigeration & Hydronic Coils

Bespoke Cooling & Technical Coil Engineering

Combining Marstair’s precision cold-chain systems with Quartz’s low-acoustic chilled water fan coils. Every unit is engineered for demanding commercial, IT, and retail infrastructure across Europe and the Middle East.

  • In-house custom copper & aluminium coil manufacturing
  • Acoustically optimized hydronic fan coil configurations
  • Engineered for high thermal stability and "fit-and-forget" durability
50+ Yrs Coil Engineering
100% Custom Configurable
West Yorkshire Manufacturing Facility
West Yorkshire Hub
Production & Quality Control

Advanced West Yorkshire Manufacturing Hub

Our dedicated facility brings under one roof precision tube-bending, fin-stamping, manual craftsman brazing, and automated testing bays to uphold British manufacturing standards.

  • Dedicated automated refrigerant charging and leak detection bays
  • Full operational thermal testing on production units before dispatch
  • Lean manufacturing workflows adaptable for custom single-unit builds
UK Made Brighouse Hub
ISO 9001 Quality Standard
TEV Ltd Engineering Team
Why TEV Ltd
Operational Strengths

Agile Engineering & Direct Technical Support

We do not sell off-the-shelf compromises. We partner directly with consultants, contractors, and end-users to design bespoke cooling solutions that seamlessly fit unique physical footprints.

  • Direct line to product design engineers rather than automated call centers
  • Seamless legacy replacement units engineered to match existing pipework
  • Flexible manufacturing capabilities catering to niche commercial applications
Direct Engineer Support
Bespoke Physical Footprints
F-Gas Transition and Efficiency
Impact & Transition
Decarbonisation & F-Gas

Leading Sustainable Cooling Transitions

Helping the HVAC industry comfortably navigate the F-Gas transition with ultra-efficient EC motor technology, lower GWP refrigerants, and optimized seasonal performance ratings.

  • Active deployment of A2L and natural lower-GWP refrigerant architectures
  • Up to 60% fan power energy reduction using EC motor technology
  • Lower operational carbon emissions across full building life-cycles
Low-GWP Refrigerant Ready
-60% Fan Energy Draw
Employee Ownership Culture
Culture & Vision
Employee Ownership Ethos

100% Employee Owned. 100% Vested.

Our transition to Employee Ownership guarantees that every technician, design engineer, and support specialist is personally invested in the quality of every unit that leaves our West Yorkshire factory.

  • Long-term commitment to British manufacturing independent of external equity
  • Profits reinvested directly into R&D and team development
  • Craftsman mindset embedded in every seam, braze, and wiring harness
100% Employee Owned
Long-term R&D Reinvestment

Leadership & Vision

Select any executive leader to read their full group statement.

John Dobson
John Dobson
Managing Director
"We bring together a proud engineering heritage and specialist expertise across refrigeration..."
Read Statement →
Nuwan Chandrakumara
Nuwan Chandrakumara
Commercial Director
"Our customers need more than an equipment supplier, they need a partner who understands their application..."
Read Statement →
James Carr-Smith
James Carr-Smith
Chilled Water Division
"Quartz fan coils represent the absolute benchmark in low-acoustic hydronic performance..."
Read Statement →
Paul Crayton
Paul Crayton
Operations Director
"Manufacturing excellence is built on continuous investment in our West Yorkshire facility..."
Read Statement →
Louise Smith
Louise Smith
Finance Director
"Financial stewardship in an employee-owned model guarantees long-term independence..."
Read Statement →
Consultant & Contractor Portal

Looking for Technical Data or Submittals?

Access our comprehensive, live Engineering Asset Matrix. Instantly search, filter, and download product sales brochures, mechanical technical manuals, diagnostic fault-finding charts, and parametric Revit BIM blocks for both the Marstair and Quartz platforms.

Open Engineering Hub