01582 932 444 training@ozonegroup.training

Build Your Career inEnergy Assessment & Building Compliance

City & Guilds approved training in Domestic EPCs, Retrofit, SAP, Non-Domestic Energy Assessment and more. Flexible learning. Expert tutors. Real-world support.

Expert Tutors
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Flexible Learning
Classroom, online live & guided learning
Practical Support
Assignments & portfolio guidance included
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Ongoing Portfolio Support
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Industry-recognised UK qualification
Experienced Tutors
Taught by working assessors
Online Learning Materials
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Portfolio Support
Hands-on assignment guidance
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Featured Courses

Our most popular Energy Assessor qualifications

Why Ozone

Why Choose Ozone Training

We're working Energy Assessors who train new assessors — not a generic training company.

  • Run by practising DEAs since 2011
  • City & Guilds approved course materials and assessment
  • Real-world tips, not just exam-pass content
  • Lifetime tutor support after qualification
  • Spread cost in interest-free instalments
  • 100% pass guarantee with free re-sits

What Our Learners Say

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Frequently Asked Questions

What is the difference between the 3-Day Online DEA course and the 2-Day Weekend DEA course?+

Both courses cover exactly the same Level 3 Domestic Energy Assessor syllabus and lead to the same recognised qualification. The training materials, assignments, portfolio requirements and assessment criteria are identical.

The only difference is how the training is scheduled.

The comparison below shows the difference between the two delivery options.


3-Day Course (Weekdays)2-Day Course (Weekend)
DaysMonday – WednesdaySaturday – Sunday
Start Time9:30 am8:30 am
Finish Time3:30 pm5:30 pm
Daily Training Hours6 Hours9 Hours
Total Duration3 Days2 Days

As you can see, the weekend course has longer training days, allowing us to cover the same syllabus in just two days. No topics are omitted or shortened, and every learner receives the same training materials, tutor support and guidance.

Whichever option you choose, you'll complete the same assignments and portfolio before achieving the same recognised qualification.

If weekdays are difficult because of work or other commitments, the 2-day weekend course offers a convenient way to complete your training without taking time off.

Can I pay for my course in instalments? How does the payment plan work+

Yes. We offer flexible interest-free payment plans on most of our training courses, making it easier to spread the cost of your qualification.

To secure your place, you'll pay an initial deposit when you book your course. The remaining balance (including VAT) is then divided into two equal monthly instalments.

Your instalments are due on the same date in each of the following two months after your initial payment. For example, if you pay your deposit on the 10th of the month, your remaining payments will be due on the 10th of each of the next two months.

There are no hidden charges or interest when payments are made as agreed. We'll confirm your payment schedule before your course starts, so you'll know exactly when each instalment is due.

If you have any questions about our payment plans or need help choosing the option that's right for you, our team will be happy to assist before you enrol.

Are there any hidden fees, registration fees or certification charges?+

No. We believe in transparent pricing, so there are no hidden fees.

The price you see for your course includes your training, learning materials, tutor support, assessment, internal quality assurance (IQA) and the cost of claiming your qualification certificate from the awarding organisation.

There are no separate registration fees, examination fees or certification charges added during your course.

Once you've qualified, you'll usually need to join a government-approved accreditation scheme before you can start producing Energy Performance Certificates (EPCs). The good news is that joining an accreditation scheme is free with almost all major schemes, although you'll be responsible for their ongoing membership or lodgement fees, which vary between providers. Many schemes also include additional benefits such as professional indemnity insurance, public liability insurance, software and technical support as part of their membership packages.

If a course includes any optional extras or third-party costs, these will always be clearly stated before you book, so you'll know exactly what is included with your course.

Ready to start your DEA career?

Speak to our team or book your course today. We'll guide you from enrolment to your first paid EPC.