Welcome to Gas Technical Services Website

Solar Systems

Solar Systems

The sun is by far the most abundant source of energy available on earth. Energy arriving at the earth's surface by way of solar radiation over a period of 40 minutes is the equivalent of the power used by the entire population of the earth in one year.

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Warm Air Systems

Many people have, and many are reluctant to change it because they cannot find a replacement to comply with Building Regulations (Part L) which was introduced on the 1st April 2005. In many cases people are feeling that they are being forced to change their ageing but much loved warm air system to a conventional system with radiators simply because there is no alternative on the market.

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What is the Unico System?

DSC00828The Unico System is a small duct central heating, air conditioning and ventilation system manufactured by Unico System International Limited (USIL), headquartered in Wales. The product has been on the market in the United States and Canada for the past 20 years, and over 250,000 of these systems have been installed there. The system has been profiled in numerous North American magazines and media outlets, most prominently on the television programme This Old House.

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Safety Check

Gas Safe Logo 200You must have your gas appliances safety-checked by a GAS SAFE REGISTERED installer every year. This is the only way to guarantee that they are working correctly. Never allow anyone without a valid GAS SAFE REGISTERED registration number to work on any of your gas appliances.

Appliances that are properly installed, serviced and adequately ventilated are efficient and safe. To avoid the accidental production of carbon monoxide and to ensure that you and your family are safe, you must:


Illegal Gas Work

Illegal gaswork can be defined simply as gas work carried out for gain by a person not working on behalf of a GAS SAFE REGISTERED business. Such work is far more likely to be unsafe and, in such cases, the illegal gas worker far less likely to offer support to the customer in the event of an incident.

“Full illegals” - people who carry out gas work without having any training – the handymen who so often appear on television programs like Rogue Traders.

“Lapsed” illegal workers - previously held a GAS SAFE REGISTRATION and have received training as a part of that membership. With the constant development of the gas industry, ACoP-level knowledge would leave a member with significant knowledge gap regarding the latest legislation and regulations, which would impact upon their ability to work safely on gas.

“Part Time” illegal gas worker - an operative of a GAS SAFE REGISTERED business with valid ACS competencies, this illegal carries out “private jobs”, typically for friends and family. Although the work is likely to be safe, installations cannot be notified, there is no insurance or warranty support available for the customer and, as such workers rarely inform their employers, the customer will not receive support from the registered business should an issue develop.

Our Reputation

clientsGas Technical Services have built an excellent reputation locally over the last 18 years for providing excellent service to both Domestic and Commercial customers within Pembrokeshire.

Fighting The Cowboys

GAS SAFE REGISTER has carried out the industry’s first research into the illegal gas market and concluded that there could be as many as 20,000 people working illegally on gas in the UK.

Along with the majority of genuine members, GAS SAFE REGISTER is very concerned about illegal gas workers. With Carbon Monoxide poisoning claiming needless lives we must work together to put a halt to illegal and therefore unsafe gas workers.


GAS SAFE REGISTER is committed to tackling this serious gas safety issue:

GAS SAFE REGISTER have launched a 'dobbing line' - 0800 915 0491. This hotline is for CORGI installers and members of the public to report suspected illegal gas work. Whilst individuals are able to remain anonymous, GAS SAFE REGISTER do need as much information as possible to track down those reported, such as names and addresses of both the person working on gas without GAS SAFE REGISTRATION, and any of their customers.

GAS SAFE REGISTER have mobilised a Hit Squad.  They have formed a nationwide team dedicated to dealing with the illegal problem. Their role is to work with un-registered gas workers to encourage GAS SAFE REGISTERED membership and safe, legal gas work. 

GAS SAFE REGISTER fully investigate reports and where applicable pass details to the HSE. Last year 2,642 illegal gas workers were reported to GAS SAFE REGISTER and, once these were investigated, 844 were then reported to the HSE for prosecution.