L-D-N Engineering Knowledge Centre

Our Knowledge Centre shares practical, accessible information about maintaining building engineering systems and understanding common faults, servicing requirements and maintenance decisions.


Editorial topics

  • MVHR filters: why routine servicing matters
  • MEV versus MVHR: understanding the difference
  • How managing agents can plan ventilation servicing across a block
  • Common AHU maintenance findings
  • Why VRF/VRV systems need planned maintenance
  • Mechanical plant inspection and pump condition
  • Electrical control faults: when specialist investigation is needed
  • How to prepare for a technical building services survey
  • What a PPM contract should include


Publishing rules
Articles must be technically reviewed, dated, accurate and original. Distinguish general education from professional advice. Avoid unsupported safety claims, copied manufacturer diagrams or guarantees.


Search and linking strategy
Every article should link naturally to the corresponding service page, survey page and maintenance enquiry.
Build topic clusters around ventilation, HVAC, mechanical engineering, controls and portfolio maintenance.


Call to action
Ask a Technical Question — Enquire about your building, asset schedule, location and required service. We will
review the scope and respond with appropriate next steps.