Qualification Details Unvented Hot Water Systems and Safety (HWSS)

This course is accredited by LCL Awards and will give you the experience and knowledge to install, service and maintain hot water systems.

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Programme description

This course covers installing, servicing and maintaining domestic hot water systems in the G3 class. This covers systems up to 500 litres of capacity and 45kW of power input. This course (HWSS) focuses on compliance with Approved Document G (ADG) 2016.

Who is this programme for?

This course is designed for those with industry experience and who are looking to upskill and add new certifications to their repertoire. Please check the pre-requisites below to make sure this course is a good fit for you.

Qualifications awarded

Learners will gain the following industry-recognised qualifications:

  • HWSS, G3 Unvented Hot Water Systems and Safety


This course requires prior learning and industry experience and is specifically crafted for those with experience in the industry.

It is essential that candidates will be experienced in the installation of cold and hot water systems. They must also hold one DCLG-recognised competency in a conventional fuel (i.e. gas, oil or solid fuel).

For those in the plumbing field, an NVQ level 2 or equivalent plumbing qualification or experience. A basic knowledge of the WRAS Water (fittings) Regulations is desirable, although this course is available separately.

Candidates undertaking the course should also be conversant with the new Part G document, which can be downloaded from the following link: Part G Building Document 2010

Course structure and Assesment method

We have a full-time option for this course:

Candidates are expected to attend our Kirkintilloch centre for 1 day for this course.


All of our course prices are displayed excluding VAT.

Unvented Hot Water Systems and Safety (HWSS) = £200+VAT

Hear from previous students

"Cannot thank ETA enough, made it so easy and down to earth to learn, also made it enjoyable, cannot thank Scott and Jan enough for all their help when going through course and especially when it came to ACS, made me feel at ease. After helping me get a job, before I had my papers through…..they are always on the end of a phone or WhatsApp if I need any help or info when I started. Always available for any help etc and always answer or call back asap. As I said. Can’t thank ETA, Scott, Jan, and Tommy and his team enough. Thank yous ☺️"

Richard Ross - December 2023

"Cannot recommend the energy technical academy enough. The facilities are brilliant as are the staff. Jan, Scott, Ryan, Gary, Gavin and Mark are absolutely brilliant and always make you feel so welcome. I'm almost finished sitting my gas ACS and wouldn't have got through it without them. The courses offered are all brilliant and are a great starting point if you're like me and decided to change career. Thanks so much for the help and support !"

Melissa McKenna - April 2023