Heating, Ventilation, Air Conditioning and Refrigeration

Celcius, based in Southampton, delivers HVAC-R services covering the South Coast of England, working with both residential and commercial clients.

We have over 23 years of experience installing, maintaining and repairing all manner of heating and plumbing, refrigeration, air conditioning and ventilation equipment.

Combining our experience with a customer service lead ethos, we are sure you will be pleased with the work carried out by Celcius.

Celcius are Hampshire based and provide services across Andover, Basingstoke, Bournemouth, Chichester, Eastleigh, Fareham, Fordingbridge, Guildford, Havant, Petersfield, Poole, Portsmouth, Reading, Romsey, Salisbury, Southampton, Tidworth, Waterlooville, Winchester and surrounding areas.


HVAC-R Care Plans

Experience reliability, efficiency, and comfort for your home or business.

  • Heating (Gas Safe | Boiler Servicing | Repairs)
  • Ventilation (Fresh Air | Extraction | Heat Recovery)
  • Air Conditioning (Heating | Cooling)
  • Refrigeration (Cellar Cooling | Chillers | Freezers)

We’re now providing care plans to both existing and new clients, applicable to both residential (domestic) and commercial properties.

These are straightforward and convenient packages designed to help you spread the costs of servicing, maintenance, and breakdowns over the year at a discounted rate, or through a one-off payment.

Comprehensive HVAC-R Solutions: Excellence from Design to Completion

From design and installations to maintenance, servicing, and repairs, Celcius offers a comprehensive range of HVAC-R services, ensuring compliance and excellence from project inception to completion.

Specialising in various f-gas and Gas Safe projects for Heating, Ventilation, Air Conditioning & Refrigeration services, we also handle electrical works through our appointed NIC/EIC contractor, certifying all works to the highest standards.

We are equipped to collaborate with other professionals on subcontractor basis, seamlessly integrating our services into your project as needed.

Our specialised services include:

  • Installation and maintenance of all air conditioning systems, including single, twin, multi, and VRV/VRF systems.
  • Installation and maintenance of refrigeration split and packaged systems for various applications such as ice machines, beer cellars, and display cabinets.
  • Ventilation systems installation and maintenance, covering heat recovery, fresh air, and extraction systems.
  • Gas Safe services for all domestic boiler works.
  • F-gas services for all refrigerant-based systems.

Resilient Growth and Commitment to Excellence: Celcius’s Dedication to Quality Service

Despite industry fluctuations, Celcius has demonstrated resilience and growth, thanks to our customer-centric approach and commitment to quality. Our stellar reputation and dedication to service have earned us a loyal client base and numerous accolades.

We firmly believe in the importance of periodic servicing for Gas Safe and F-Gas systems, emphasising the benefits of regular maintenance, including extended lifespan, reduced operating costs, and minimised downtime.

Our track record speaks for itself, with countless satisfied customers attesting to our commitment to excellence.

For any inquiries of our services, please don’t hesitate to contact us.

View Our

Latest News & Projects


Navigating Refrigerant Phase-Outs: Celcius Leading the Way

In response to mounting concerns over the environmental impact of refrigerants, governments worldwide are accelerating the phase-out of high Global Warming Potential (GWP) refrigerants. Celcius, a premier provider of refrigeration solutions, stands at the forefront of this transition, spearheading efforts to adopt eco-friendly alternatives and embrace sustainable practices.

Continue reading »


What Our Clients Say

Rob Bacon
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Great work, fitted and commissioned an unusual air con unit for us. Very friendly and helpful.
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Positive: Professionalism, Punctuality, Quality, Responsiveness, Value Fantastic company to deal with! Highly proffesional and efficient, whilst being reasonable on costs. Highly recommended! Services: HVAC system repair, HVAC system maintenance
Matt Carter
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Positive: Professionalism, Quality, Responsiveness Always great service. Diagnoses and sources parts for a quick fix. Definitely recommend. Service: Installation
Stephen Light
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Honest, genuine and reliable. Reasonably priced.Highly recommend.
John Goss
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Extremely pleased with the work I had done. I was impressed when work continued throughout a heavy rainstorm. Everything was completed to my satisfaction and all is working well. No hesitation in recommending him and his work
Neil Woodhatch
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Positive: Professionalism Very thorough and Professional, tidy work at all times and fair pricing structure for the maintenance of our kit. Services: A/C system maintenance, HVAC duct & vent cleaning
Kyle Stacey
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Positive: Professionalism, Responsiveness Thanks to Steve for installing my new AC unit! Steve was professional, friendly and went above and beyond to get the unit installed quickly too. Services: Install AC, Ductless heating & A/C services
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Positive: Professionalism, Punctuality, Quality Steve visited to help us troubleshoot our deepwell calibration bath. We were impressed with his knowledge and patience in finding coolant leaks and assessing components. Service: HVAC system repair
Jeremy Rouse
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Positive: Professionalism, Punctuality, Quality, Responsiveness, Value Quality product, fair pricing, aesthetically pleasing installation all tied up with a friendly, professional and punctual service. I wouldn't use anybody else. Service: Install AC
Guy Blackburn
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Positive: Professionalism, Punctuality, Quality Really professional and quick. Work completed in 2 days and looks fantastic. Well recommend. Service: Install AC
Peter Williamson
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Positive: Professionalism, Punctuality, Quality, Value Great service, arrived on time and price as per quote Service: A/C system maintenance
Paul Stamp
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Positive: Professionalism, Quality, Value Celcius provided a really helpful service. They fixed my servicing and repair and were incredibly neat and efficient Services: Heating system repair, Repair HVAC