Heating - About A.T.S Gas Services ATS Gas services is a young, dynamic up and coming local company in the gas industry based in belfast. are primary services are gas and oil boiler servicing and repair specialists, plumbing and heating services, Gas installations. ATS gas services policy: To put our clients first To continue investing in training staff to ensure we stay at the cutting edge To provide a Quality Service at the most cost effective price To treat your home and property with the upmost care and respect Thank you for visiting our site and we hope you find the information on our services useful.