BOHS P903 - Management and control of evaporative cooling and other high risk industrial systems

£350 ex VAT & a BOHS exam fee of £255.00 per delegate



Syllabus/Course Structure and Assessment

BOHS P903 - Management and control of evaporative cooling and other high risk industrial systems is there to provide background and an overview of the risk of Legionella infection and how it can be controlled in Evaporative Cooling and other high risk Industrial type systems. It is a requirement of this course that candidates have successfully completed P901 - Legionella- Management and Control of Building Hot and Cold Water Services. Where both P901 and P903 courses are run on subsequent days or as a combined course then this prerequisite is waived.

The main subject areas of the course are:

Who is this course suitable for?

  • Process and cooling water system technicians and operatives.
  • Responsible persons for industrial type water systems (e.g. building and facilities managers, duty holders, maintenance staff).
  • Legionella risk assessors and consultants.
  • Occupational hygienists and health and safety managers.

Course Timing

Duration: 1 day

Start time: 9am on course day

Finish time: Approximately 4pm

Written Exam: 20 short answer Questions, 60 mins

Report submission.

In order to be awarded a Certificate for this examination, candidates are required to provide evidence of field proficiency. To satisfy this requirement candidates are required to demonstrate that they have carried out, possibly under supervision, one field assessment of an appropriate water system under their direct or indirect control. The report must show to the examiner that the candidate is competent to do the work.







Thank you for your course/exam booking with AEC. Please see the below update from BOHS.

Please note, we have been informed by BOHS that from 1st November 2025 all AEC BOHS classroom courses will be electronic exams only. BOHS will no longer be sending paper exams. Therefore, we will now require BOHS Candidate Information Forms to be sent to us to process your exam booking . BOHS will not issue paper exams. This form must be completed and returned to training@aec.uk within 48 hours of making the booking, without this form, we cannot order an exam for you.

All classroom courses will now have a remote exam set up by BOHS. You will need to bring a laptop with you to complete the exam. Please bring this with you on the first day of the course.

Please click here for further online Exam FAQ’s, test examination, guidance and contact information.

The reason for the above is because BOHS will now be using an online exam software provider, Eva, to provide the function to generate online exams.

This should help speed up the turnaround time for the marking process.

Many thanks

We appreciate your assistance with this matter






Dates for this course will be added soon.

If you would like to talk to us about an urgent training need please call us (Manchester) 0161 872 7111 or (Essex) 0203 384 6175 or contact us via the form below.




Get in touch

Contact our team of consultants to discuss how we can help. Please fill in the form or call:

Manchester 0161 872 7111
or Essex 0203 384 6175

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