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Delta First Building Services Insights

Expert Advice on Electrical, Mechanical, HVAC & Compliance

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Commercial Building Services Insights
Delta First Building Services Insights

Expert Advice on Electrical, Mechanical, HVAC & Compliance

  • Compliance, Fire & Security

The Building Safety Act for building owners: accountable persons, the golden thread and M&E records

Reviewing building safety records for the golden thread

What the Building Safety Act 2022 means for building owners: accountable persons, the golden thread and the M&E and fire records you need to keep.

  • Delta First Editorial Team
  • October 25, 2026
  • Electrical, Energy Efficiency

Commercial solar PV in Essex: sizing, grid connection and maintenance for business premises

Engineer inspecting a commercial rooftop solar PV system

How to size commercial solar PV for an Essex business, the DNO and planning checks that apply, available tax reliefs and how to keep it performing.

  • Delta First Editorial Team
  • October 24, 2026
  • Energy Efficiency, Mechanical

Commercial heat pump installation: is your building ready and what does it involve?

Commercial air source heat pumps beside a building

What a commercial heat pump installation involves: heat loss surveys, flow temperatures, electrical capacity, refrigerants, funding and maintenance.

  • Delta First Editorial Team
  • October 23, 2026
  • Compliance, Fire & Security

HMO fire safety requirements: alarms, emergency lighting and fire doors for landlords

Hallway of a shared house with fire doors and a smoke alarm

HMO fire safety explained for landlords: fire risk assessments, alarm grades, fire doors, emergency lighting, licensing and keeping compliant.

  • Delta First Editorial Team
  • October 21, 2026
  • Electrical, Facilities Management

Upgrading to three-phase power for commercial premises: process, DNO applications and timescales

Three-phase intake and switchgear in a commercial building

How a single-phase to three-phase upgrade works for business premises: when you need one, the DNO application, timescales, costs and on-site work.

  • Delta First Editorial Team
  • October 21, 2026
  • Compliance, Electrical

Lightning protection testing under BS EN 62305: inspection intervals and what engineers check

Engineer testing a lightning protection system

How often lightning protection must be inspected under BS EN 62305, what engineers check, who is responsible and which records to keep.

  • Delta First Editorial Team
  • October 19, 2026
  • Compliance, Fire & Security

Dry riser testing and maintenance: inspection intervals and responsible person duties

Engineer testing a dry riser inlet

Dry risers need six-monthly visual inspections and an annual pressure test under BS 9990. What each visit covers and who is responsible.

  • Delta First Editorial Team
  • October 19, 2026
  • Compliance, Fire & Security

AOV and smoke ventilation maintenance: testing frequencies and duties for building owners

Engineer testing an automatic smoke vent in a stairwell

How often AOVs and smoke vents should be tested, who holds the legal duty, and what records building owners need to keep.

  • Delta First Editorial Team
  • October 15, 2026
  • Compliance, Fire & Security

BS 5839 fire alarm categories explained: L1 to L5, M and P systems

Engineer inspecting a fire alarm control panel

BS 5839 fire alarm categories in plain English: M, L1 to L5, P1 and P2, domestic grades, who chooses the category and how often to test.

  • Delta First Editorial Team
  • October 15, 2026
  • Electrical, Facilities Management

Emergency electrician in Colchester: what counts as an emergency and what to expect

Electrician carrying out an emergency electrical repair in a shop

What counts as an electrical emergency, what to do while you wait, how to choose a 24/7 electrician in Colchester and how call-out charges work.

  • Delta First Editorial Team
  • October 15, 2026
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