Air Conditioning Installation in Radnor, PA

Most air conditioning replacements in Radnor Township involve equipment that was itself a retrofit — cooling added to a house built with heat and nothing else, with the air handler put in the attic because it was the only place it fitted and duct threaded through knee walls and closets to reach the rooms.

That history is the single most important thing to understand before choosing new equipment, because the duct will constrain the result far more than the brand will. PJ MAC installs in Radnor from our Drexel Hill headquarters. Estimates are free.

We assess the duct before quoting equipment

Cooling places a higher airflow demand on ductwork than heating does. A retrofit duct system that has always felt adequate in winter can still be the limiting factor in summer, and installing a larger or higher-efficiency system on top of it delivers a disappointing result with a bigger invoice attached.

Where the runs cross an unconditioned attic — which in Radnor they usually do — sealing and insulating them affects the outcome more than the efficiency rating of the equipment does. It is also dramatically cheaper to do while the old air handler is out and the attic is already open than as a separate visit later.

Right-sizing, and why it usually means smaller

The most common installation mistake in this trade is oversizing, and retrofit systems in older homes are among the most frequently oversized we find. An oversized unit cools quickly, satisfies the thermostat, and shuts off before it has run long enough to remove humidity — producing a house that is cold and clammy and a compressor worn by repeated starts.

We size from a load calculation on the actual building rather than matching the outgoing unit, because the outgoing unit frequently carried the same mistake. In a lot of these houses the correct system is smaller, and costs less.

Zoning a larger house

Where a single system serves floors with very different loads — a shaded first floor and a top floor under a hot roof — zoning is often the more effective spend than extra capacity. It is also a decision best made at replacement, when the equipment and controls are being chosen together.

A zoned system also wants staged or modulating equipment. A single-stage unit delivering full output into one zone drives static pressure up, trips limits, and produces noise. That pairing matters more than the badge.

Condensate, planned properly

Any new attic air handler should leave with a correctly pitched primary drain, a secondary pan and a working float switch. In a house with plaster ceilings below, that float switch is the cheapest insurance in the installation, and we verify it operates before we finish.