What Is a Preventive Maintenance Contract?

A preventive maintenance contract (also called a PPM contract — Planned Preventive Maintenance) is a service agreement between a building owner and a licensed maintenance contractor. Under the contract, the contractor carries out regular, scheduled servicing of your building's systems — most commonly the ACMV (air conditioning and ventilation), electrical, and plumbing equipment.

The defining characteristic is that the work is preventive, not reactive. Rather than calling a contractor only when something breaks down, a PPM contract means qualified technicians visit on a fixed schedule throughout the year, catching small problems before they become expensive failures.

For ACMV systems in Singapore's commercial buildings, a PPM contract is effectively standard practice — and in many cases, a requirement of your building management, insurer, or BCA compliance obligations.

Why It Matters

In Singapore's climate, ACMV systems run year-round under heavy load. Without regular servicing, equipment deteriorates faster, energy consumption rises, and breakdown risk increases sharply. A well-structured PPM contract pays for itself many times over in avoided emergency repairs and extended equipment life.

What a PPM Contract for ACMV Typically Includes

A comprehensive ACMV preventive maintenance contract in Singapore should cover:

  • Monthly FCU servicing — filter cleaning, drain pan inspection, coil cleaning, thermostat check, and airflow verification for all fan coil units.
  • Quarterly AHU maintenance — coil cleaning, belt tension and bearing inspection, filter replacement, fan and motor check, and airflow measurement for all air handling units.
  • Bi-annual chiller and cooling tower servicing — performance checks, water treatment review, refrigerant leak test, and mechanical inspection of all central plant.
  • BMS calibration and monitoring — quarterly checks to ensure building management system setpoints are accurate and alarms are functioning.
  • Written service reports — signed documentation after every visit detailing what was done, anomalies found, and recommended actions.
  • Annual compliance report — documentation for BCA and building management purposes confirming the system is maintained to regulatory standards.
  • 24/7 emergency call-out — duty technician available around the clock for critical system failures.

For a more detailed breakdown of what ACMV maintenance contracts cover and what to watch out for, see our guide on ACMV maintenance contracts in Singapore.

PPM Contracts Beyond ACMV

While ACMV is typically the largest component of a building's maintenance contract, a full building PPM contract may also cover:

  • Electrical systems — LV switchboard inspection, lighting checks, earthing verification, and emergency lighting testing.
  • Plumbing and drainage — pump servicing, valve operation checks, drain cleaning, and water tank inspection.
  • Fire protection systems — sprinkler system inspection, fire suppression checks, and SCDF compliance documentation (typically handled by a separate specialist contractor).

Bundling ACMV, electrical, and plumbing maintenance with a single contractor simplifies management and often reduces overall cost compared to managing three separate contractors. Winsteam's integrated MEP engineering capability means we can cover all three disciplines under a single maintenance contract.

Is a PPM Contract Required by Law in Singapore?

There is no single law that mandates a "preventive maintenance contract" by name, but several regulatory requirements effectively make it necessary:

  • BCA / CP13 — requires that ACMV systems in commercial buildings are maintained in good working order. Building owners are responsible. A PPM contract with a licensed ACMV contractor is the standard way to demonstrate this.
  • Building management requirements — most strata and managed commercial buildings require tenants or owners to maintain their ACMV systems, often with a requirement to provide service records on request.
  • Insurance — some commercial property insurers require evidence of regular maintenance as a condition of cover for ACMV-related claims.

Key Things to Check Before Signing

  • Is the contractor BCA-licensed? Only a licensed ACMV contractor should be carrying out notifiable ACMV works. Verify on bca.gov.sg.
  • What equipment is in scope? Confirm every piece of ACMV equipment in your building is listed in the contract schedule. Unlisted equipment will be billed at ad-hoc rates.
  • Are consumables included? Ask specifically whether filters, belts, refrigerant top-ups, and water treatment chemicals are included or charged separately.
  • What is the emergency response time commitment? Get it in writing — not as a general statement, but as a specific time commitment for critical failures.
  • Who are the technicians? In-house employees provide more consistent service than subcontractors who may not be familiar with your building.

Winsteam Engineering provides ACMV and MEP preventive maintenance contracts for commercial buildings, hotels, factories, and data centres across Singapore. Learn more about our maintenance services or contact us for a site-specific quotation.