Semi-annual for homes; quarterly for commercial. Dusty sites may need monthly filter checks.

Yes—basic points (start/stop, alarms, temp) and coordination with your BMS vendor for advanced logic.

Small homes: 1–3 days; offices/shops: 3–7+ days depending on ductwork, electrical, and access.

Yes—subject to structural access, crane/hoist, and vibration isolation.

We propose slim-duct routes, bulkheads, and short-run solutions—subject to aesthetics and access.

We service AHUs/FCUs and coordinate with plant vendors, or quote plant service if in scope.

With correct design (tight ducts, right CFM, setpoint strategy), central AC can be efficient—and far more comfortable.

Yes—thermostats + motorised dampers or VAV. We also ensure the AHU can handle turndown without coil freeze.

Often—subject to ceiling height, return paths, electrical capacity, and duct routes. We’ll survey and propose options.

Yes—where contamination is confirmed. We combine access doors, HEPA vac, and post-clean sealing to avoid re-leaks.

Yes—via FA intake with ERV/HRV and proper mixing so comfort and energy balance stay intact.

Low airflow, clogged filters, low refrigerant, or control faults. We diagnose cause, not just melt the ice.

Typically 1–3 months for homes, 1–2 months for commercial, faster in dusty sites. We can upgrade to higher MERV where fans can handle the pressure.

We check static pressure, grille sizing, sharp elbows, and poor transitions, then rectify with design-grade fittings and attenuation.

Yes—by balancing dampers, correcting return paths, and sealing leaks to hit design CFM in each room.