AC installation and replacement in Franklin Park

Sizing is the decision that matters most

If you take one thing from this page: the capacity of the system matters more than the badge on it, and bigger is not better. In a climate where summer comfort is largely a humidity problem, an oversized air conditioner produces a house that is cold and clammy at the same time.

Correct sizing comes from a load calculation that accounts for your house’s square footage, insulation, window area and orientation, air leakage and layout. It is not a matter of replacing three tons with three tons because that is what is sitting on the pad — particularly in a borough where many houses have had windows, insulation or finished basements added since the original system went in.

Ductwork sets the ceiling

Airflow limits what any system can deliver. If returns are undersized, if runs are crushed or disconnected in a crawlspace, or if long branches pass through an unconditioned attic, a new condenser will not fix the rooms that have never cooled properly. A contractor who inspects the duct system before quoting is offering you a solution; one who quotes only a box is offering you a box.

Efficiency ratings, and reading them honestly

Cooling efficiency is published as SEER2, a seasonal measure adopted in 2023 that replaced the older SEER figure using a test method with more realistic external static pressure. The practical consequence for a homeowner is small but worth knowing: a SEER2 number is not directly comparable to an older SEER number, so if you are weighing a new system against the label on a fifteen-year-old unit, you are not comparing the same scale.

Higher efficiency costs more up front and uses less electricity. In this climate the cooling season is real but not enormous, so the payback on the top efficiency tiers is slower than it would be further south. That is not an argument for the cheapest option; it is an argument for asking a contractor to justify a tier rather than assuming more is better.

Variable-speed and two-stage equipment is often worth more than the efficiency step for a different reason: longer, gentler run cycles dehumidify better and hold temperature more evenly, which is exactly what a humid August in the North Hills asks for.

What a proper installation actually involves

Much of the value is invisible once the panels are back on, which is precisely why it gets cut to win a price comparison. A thorough job includes evacuating the line set to remove air and moisture before charging, weighing in the refrigerant charge to the manufacturer specification rather than estimating, verifying airflow across the indoor coil, checking that the condensate path drains properly and has a working safety switch, and confirming the system performs as expected before the van leaves.

Moisture left in a refrigerant circuit reacts with the oil and causes damage that shows up years later, long after anyone connects it to installation day. It is the clearest example of why the cheapest quote is sometimes the most expensive system.

Questions worth asking every contractor

• Will you do a load calculation, or are you sizing from the existing equipment?
• What indoor coil is included, and is it a matched, rated combination with the outdoor unit?
• Which refrigerant does this system use?
• Are you reusing the line set, and if so, what are you doing about cleaning and compatibility?
• Does the quote include a permit and inspection where the borough requires one?
• What is the manufacturer parts warranty, what is your labour warranty, and does registration affect either?
• Is removal and disposal of the old equipment included in the price?

Contractors who do careful work are generally pleased to answer these. A reluctance to put specifics in writing is itself an answer.