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.
Featured Courses
Our most popular Energy Assessor qualifications
Self-Paced Domestic Energy Assessor Course | Guided Online Level 3 DEA Training
3-Day Online Domestic Energy Assessor Course | Live Level 3 DEA Training
2-Day Weekend Domestic Energy Assessor Course | Live Online Level 3 DEA Training
Upcoming Course Dates
Live availability across all our courses
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 courses
- Real-world tips, not just exam-pass content
- Spread cost in interest-free instalments
- 100% pass guarantee with free re-sits
What Our Learners Say
Real reviews from our Google profile
Frequently Asked Questions
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.
Is a Commercial Energy Assessor the same as a Non-Domestic Energy Assessor?+
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) | |
|---|---|---|
| Days | Monday – Wednesday | Saturday – Sunday |
| Start Time | 9:30 am | 8:30 am |
| Finish Time | 3:30 pm | 5:30 pm |
| Daily Training Hours | 6 Hours | 9 Hours |
| Total Duration | 3 Days | 2 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.
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.