Mechanical Services with a Difference

We appreciate that individual needs differ from customer to customer whether it’s the size of your building, budget or complexity; we work closely with you to meet your specific desires. In building a close business relationship from the onset of consultation right through to the planning, delivery and support, we pride ourselves in delivering our projects seamlessly. 

Mechanical Services

GMS can deliver Mechanical Services across any of the following key areas: Air Conditioning, Cooling, Heating, Plumbing, Ventilation, Refrigeration

Planned Preventative Maintenance

It is critical that your systems and equipment are maintained properly. The key objective of planned preventative maintenance is to prevent the failure of equipment before it occurs

Project Management

Our highly skilled project management team provides full project management services for the design, construction, installation and maintenance of Air Conditioning, Plumbing and/or Ventilation projects.

Consultancy and Design

We provide a bespoke service for the complete design and specification of your Air Conditioning Plumbing/Heating or Ventilation projects.

Our accreditations

Our credibility in the market and many successful projects delivered, gives GMS the highest confidence in the quality of our services which we utilise in all the customer projects we engage in.

Daikin Certified Installer Scheme

The Daikin Certified Installer programme is designed to promote and maintain the highest standards of practice and performance, providing enhanced warranties along with the extra credibility that comes from working with a market leader. As an established Daikin installer, our focus is on quality products, installation, and service – backed by high standards of training and accreditation.

Mitsubishi Electric Accredited Installer

Designed to raise industry standards, Mitsubishi Electric's Partner Programme assures end users of a consistently high level of installation and after sales service that supports our systems. Our Partner Programme is inclusive and open to all qualifying companies installing air conditioning and heating.

Safe Contractor

Safe Contractor accreditation has been achieved following an assessment of the contractor’s health & safety documentation, and compared against the Safe Contractor Charter Standards, which set out the health & safety standards required to achieve this accreditation. Safe Contractor also supports our business by helping us demonstrate commitment to sustainable and ethical practices.

F Gas

The F-Gas Register is appointed by the secretary of state for the environment, food & rural affairs (DEFRA) to operate an F-Gas Certification body under the stationary equipment provisions of fluorinated greenhouse gases regulations.


SafePQQ goes beyond Health and Safety showing our clients our commitment to ethical business practice, through a series of compliance questions covering GDPR, Finance, Modern Slavery, Building Information Modelling, Quality Management, Right to work, Environment, Anti-bribery and Equality.

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Why Choose Grays Mechanical?

GMS is a family run business set in the heart of Buckinghamshire, South of England. With a wealth of over 20 years experience in the industry, we operate as an independent supplier to offer impartial advice and guidance on the best equipment and leading technology, creating the perfect building environment to suit your needs.

Simple & Straight Forward Approach

We always keep our customers informed so you know what will be delivered, what the time frames are and costs incurred through clear project management and planning exercises.

Vast Experience

As a major competitor in the Industry, most our work is undertaken through reputation. We have delivered successful projects across commercial, retail and domestic environments, offering an end-to-end personalised and tailored service for Air Conditioning, Plumbing/Heating and Ventilation Solutions.

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Services with a difference

Our Services