Air-Conditioning in an HDB Renovation

Aircon comes before the ceiling design

The route the refrigerant piping and condensate drain take determines where a false ceiling or bulkhead is required, and how much ceiling height it costs. Planning the ceiling first and the aircon second is the most common cause of a bulkhead appearing where nobody wanted one. TO FILL: aircon system supply-and-install by number of indoor units

Sizing is a calculation, not a preference

Capacity is matched to room volume, glazing area, orientation and occupancy. An undersized system runs continuously and never dehumidifies properly; an oversized one short-cycles and leaves the room clammy.

Condensate drainage is a gravity problem

The drain must fall continuously to its discharge point. Where a flat's geometry makes that impossible, a condensate pump is added — and a pump is a serviceable item that needs access.

Servicing is an ongoing cost, not a one-off

In Singapore “aircon servicing” means the routine clean of filters, coils and drainage that keeps a system dehumidifying properly, and it is a recurring cost separate from installation. A system installed without thinking about servicing access becomes more expensive to maintain than one that was. TO FILL: aircon servicing price per unit

Installation and servicing access

Fan coil units need periodic servicing, so the access panel position belongs on the ceiling drawing. Air-conditioner installation work is required to be carried out by a trained installer (HDB).