Keep your system running efficiently & effectivley

We don’t like to state the obvious but:

​Planned Preventative Maintenance (PPM) is crucial to ensuring your air conditioning system is operating as efficiently as possible but it also has numerous other benefits:

Ensures your manufacturer warranty remains valid

Reduces risk of expensive repairs due to mechanical failure

Increases the lifespan of your equipment giving you a greater return on your investment

Reduces environmental impact through efficient energy use

Comply to F-gas regulations for leak testing checks

Sub Zero offer a range of packages:

Something as simple as a blocked filter or blocked condensor coil can reduce your systems efficiency by upto 60%. Restricted airflow can cause serious mechanical failure costing hundreds of pounds in repairs or often leads to water damage to interior decoration or equipment.

  • One off service
  • 6 monthly service
  • Annual service
  • Strip down and deep clean service

Climate Change & Greenhouse Gases

The Kyoto Protocol 1997 is an international treaty which is committed to reductions in emissions that contribute towards global warming or climate change.

HFC (Hydroflourocarbon) refrigerants are one of the 6 greenhouse gases that the Kyoto protocol applies to and we must take steps to ensure emissions are kept to a minimum. With this in mind the F-Gas leak test regulations came into place in 2015, strict leak testing procedures were introduced to ensure a reduction in the release of HFC refrigerants into the atmosphere.

The amount of HFC refrigerant in your air conditioning system dictates how often the system needs to be leak tested each year. Ensuring adequate leak testing is the responsibility of both the owner/operator  of the equipment and the contractor and is a legal requirement.

Sub Zero can help to keep you compliant by ensuring all systems are leak checked in accordance with F-gas regulations but also by ensuring all equipment log books are kept upto date with all the necessary information.  F-gas regulations are legal obligations to ensure we reduce global warming emmissions.


Paula Graham, Operations Manager - Alpha Vitality

Craig and his Sub Zero team have been looking after all of our sites over the North East and North Yorkshire areas for a number of years. All of our units have been installed by Sub Zero and their continued support and maintenance is always to the highest standard. The full team are always on hand to discuss problems and attend site should we need them. As we work in a clinical area the team have been very accommodating to our needs and have always attended sites when it suits the practice. Thank you all for your continued support

Andrew Beardshall

Sub Zero recently fitted a domestic unit for us in our new extension. The quality of their work is fantastic and they couldn't do enough for us. Great service, great work

Highly recommended!

Ian Gordon - Riverdale Healthcare

Craig installed one of the first air con units in a dental surgery for me around 1997. Since then we have worked together to install well over 100 units in multiple surgery sites in the North East and North Yorkshire , from retro fits to new builds to conversions. Sub Zero's service has always been first class, pricing always fair and competitive and I recommend this company without reservation

James Sheun

Professionalism, Punctuality, Quality, Responsiveness, Quality!
Highly Recommend, Sub Zero provided excellent quality & professionalism during the installation of 2 x Mitsubishi Electric Zen units

Paul Thompson

Sub Zero have fitted us 3 units in the past and their work is exceptional. Their service is top class and we wouldn't hesitate to recommend Sub Zero. Thanks again.

Carl Sanderson HSL Chairs

We have worked with Sub Zero for the last 8 years for all of our air conditioning requirements whether it has been installation, maintenance or repairs. Sub Zero were a vital part of our store expansion programme installing in the region of 150 systems in our new outlets spanning the length and breadth of the UK. The entire Sub Zero team have always given us first class service, extremely high quality installations and they now provide a PPM package to ensure we are compliant and upto date at all times. An excellent company who I recommend without hesitation.

Keith Roper

Sub Zero have fitted 3 units in our bungalow, this company is top class from advice to installation of the units. The work was carried out both swiftly and with great care to detail and the units work perfectly. If it's top class service you are wanting look no further than this one stop shop, you won't be disappointed. 5 star plus service.

Dean Lancashire

Couldn't recommend this company enough. Craig quoted quickly and explained what was required. The Sub Zero team came and installed the kit rapidly in temperatures close to 30c in our loft bedroom and were very tidy and professional on completion. Thank You

Jim Freeman - Patriot Games Sheffield

As a business that constantly holds in-store events and regularly fills our space with people, it was important that we found the correct solution for Air-Con. Craig and his team recommended and fitted a system for us that has been perfect and problem free for the 5 years we have been using it. Great after care and affordable maintenance contracts. I cannot recommend Sub Zero highly enough. Even if you don't really know what you need, they will be willing and able to help.

Ian Palmer

The guys at Sub Zero excelled themselves throughout the whole process. SubZero assured me that the job was well within their capabilities. Even though they had suggested a slightly larger unit the price was still comparable with other quotations I had received. On the day of installation the whole process was over and completed within the morning.

I cannot recommend Craig and the Sub Zero team highly enough

Juliette Walstow: Armthorpe WMC

These guys are amazing, very professional. The job was done over a few days but each day our club was left clean and safe. The air con systems are great, the guys gave us a full detailed guide of how to use them efficiently. Fantastic Job, Thank you!

Walden Effingham

The Sub Zero team were very helpful and efficient when they fitted our air con unit in our conservatory. 3 years later when there appeared to be an electrical problem they were again very helpful in attending and providing a solution. Recommended.

Mac N Alli

We are a tea room / gift shop in South Shields and Sub Zero provided us with our air conditioning system. From an initial survey of the job to providing us with good advice, Sub Zero gave us an extremely high quality installation.... they were amazingly efficient and friendly, completing an impressive job at a very competitive price. Well done and thanks for everything. It's a pleasure to work with a professional team like yours. It makes my job easier and our customers more comfortable.

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