Aircon Installation in San Mateo

Sizing is by room area, ceiling height, insulation, window area and sun exposure — a good installer does a load calculation, not a guess. An undersized unit runs constantly and never cools; an oversized one short-cycles and wastes energy. Insist on a sizing rationale in the quote.

A back-to-back single split is often a half-day job; a multi-split takes one to two days; ducted installs run two to four days depending on the ductwork. Long pipe runs, wall chasing and crane access for outdoor units add time.

In San Mateo, get three quotes from certified installers, check reviews and refrigerant-handling credentials, and confirm the sizing and electrical scope in writing. The cheapest quote often skips the load calc or the dedicated circuit.

A single split cools one room cheaply. A multi-split runs several indoor heads off one outdoor unit — good for a few rooms without ductwork. Ducted gives even whole-home comfort but costs most and needs ceiling/roof space. Match the choice to how many rooms you actually cool.

Not always. A new unit often needs a dedicated circuit and isolator, which may require a licensed electrician. Confirm whether the quote includes the electrical supply, or whether that's a separate cost you'll arrange yourself.

Roughly: 0.5-0.75HP for a small bedroom, 1.0-1.5HP for a medium room, 2.0-2.5HP for a living area — bigger if sun-exposed or high-ceilinged. Inverter units cost more upfront but slash monthly Meralco bills.