AC Installation & Replacement

Five things move the number: the calculated capacity, the efficiency and staging tier you choose, how much duct and return work the airflow requires, how hard the equipment is to get in and out, and whether the electrical service and line set can be reused. An attic changeout up a pull-down stair with undersized returns costs more than a basement swap with good ducts, for identical equipment. We itemise all five so you can see which parts are optional. Financing is available, and state and utility rebates may apply.

Weigh four things in order: age, refrigerant, which part failed, and how many times you have already called. Under ten years with a capacitor, contactor or fan motor gone — repair, without hesitation. Past fifteen with a leaking evaporator coil or a failed compressor, especially on obsolete refrigerant, the repair buys a season and the replacement buys a decade. The middle years are a genuine judgement call, and it usually turns on whether the ductwork needs attention anyway, because that work is far cheaper with the system already opened up.

Whatever the load calculation says, which is frequently less than the unit being replaced. Square footage on its own is a poor predictor: two houses of the same size in Montclair, one with original single glazing and an unsealed attic, the other retrofitted, can differ by a full ton. The calculation reads the actual building. It also splits the moisture load from the temperature load, which is what stops the new system feeling damp.

Rarely a good idea, and often not permitted. Condensers and indoor coils are rated and sold as matched pairs; bolting a new outdoor unit to an old coil gives you neither the capacity nor the efficiency on the label, and the metering device may be wrong for the new refrigerant entirely. If the existing system runs R-22 the answer is no — the refrigerants are not interchangeable and the oil is different. Where the indoor coil is genuinely recent and the match is listed, we will do it and say so.

A straight changeout with good access is normally a single day, start to finish, with the house cooling again that evening. Add a day where the air handler is in a tight attic, where duct or return modifications are part of the scope, where a new circuit has to be run, or where a ductless system means multiple indoor heads and line sets through finished walls. The inspection follows later and does not keep the system off.

In practice yes — municipalities here treat mechanical changeouts as permitted work, and the electrical side often needs its own. A licensed contractor files it; ICS holds NJ Master HVACR and Home Improvement Contractor licences and pulls the permit as part of the project. Unpermitted equipment tends to surface at the worst moment, during a home sale, and rebate programs generally want the approved inspection on file.

It depends on what bothers you. Single-stage equipment is either full output or off, which is fine in a tight, well-ducted house and unpleasant in a leaky one. Variable-capacity equipment loafs along at part load for hours, which holds temperature steadier, runs quieter, and pulls far more moisture out because the coil stays wet. In a humid Jersey July that difference is the one people actually notice.

Often, and they are worth checking before you choose equipment rather than after. State and utility programs favour high-efficiency and heat pump systems, and eligibility usually depends on the exact model pairing and on a properly documented, inspected install. We check current program terms against your proposal and file the paperwork. See rebates and incentives.