
Systems: Single-split, multi-split, ceiling cassette, ducted mini-split, VRV/VRF (all major brands).
Typical Issues: Not cold, water leaks, noisy indoor unit, foul odour, high bills, tripping.
What We Do: Routine servicing, chemical wash/overhaul, installation, leak detection & repair, gas checks, thermostat & sensor replacement, relocation/trunking works.
Recommended Frequency: Every 3–4 months (monthly/bi-monthly for heavy use or dusty rooms).
Systems: VRV/VRF, ducted split, cassette & ceiling-concealed FCUs, AHUs, fresh-air & exhaust.
Typical Needs: Quarterly PMs, coil & filter care, drainage checks, airflow balancing, odour control, energy optimisation.
What We Do: Planned maintenance, troubleshooting/repairs, installation, IAQ spot checks, belt & bearing service, condensate pump service, reinstatement/handover support.
Schedule & Support: Monthly/quarterly PM options with SLA availability for breakdowns.
Deliverables: PM reports, asset register, trend logs (amps/temps/pressures), recommendations & CAPEX planning.
Coordination: Liaison with MCST/building management, renovation/fit-out teams, safe-work documentation as required.


Systems: Chilled-water FCUs/AHUs, large AHUs, precision cooling (server/IT rooms), make-up air & process ventilation, exhaust/pressurisation fans.
Typical Priorities: Uptime, temperature/humidity stability, filtration, compliance, energy & lifecycle cost.
What We Do: Preventive & predictive maintenance, coil & filter programs, vibration/thermal checks, installation, airflow testing & balancing, spare-parts strategy, shutdown planning.
Schedule & Support: Monthly (or tighter) for critical spaces; 24/7 emergency call-out options available.
Deliverables: Maintenance logs, incident reports, performance trending, audit-ready documentation, optimisation roadmap.
Enhancements: BMS/IoT monitoring hooks, redundancy planning (N+1), IAQ upgrades (pre/medium/HEPA where applicable).
Get prompt responses from a friendly, professional and knowledgable support team.
At Cosy Engineering, we are committed to providing top-quality air conditioning solutions with exceptional service. Here’s why customers trust us:
Expert Technicians – Skilled professionals with years of experience.
Reliable & Fast Service – Quick response times and efficient solutions.
Affordable & Transparent Pricing – No hidden fees, just honest rates.
Energy-Efficient Solutions – Helping you save on electricity bills.
Customer Satisfaction Guaranteed – Trusted by homeowners and businesses alike.
Experience the difference with Cosy – your trusted air conditioning partner!
We offer solutions to all your ACMV needs, from residential to industrial and commercial, we are confident in providing quality service.
Reach out to us via “Contact Us” page with your queries, let us help you.
We are BizSafe level 3 certified. With trained and qualified technicians and management to strictly enforce our zero-accident policy.