Air Conditioning Installation & Replacement

When your air conditioner is beyond a worthwhile repair, the right replacement — properly sized and installed — pays you back every summer in lower bills and steadier comfort. All-Pro Services installs high-efficiency central air across Washington, D.C. and Maryland, with a free estimate up front.

A new system is only as good as its installation. Our NATE-certified team sizes the equipment to your home, not to the old nameplate, and we’re a factory-authorized dealer for Lennox, Trane, American Standard, Rheem, Ruud, Bryant, Carrier and York — so you get the right unit installed to perform for years.

Is it time to replace your air conditioner?

A few signs it’s worth pricing a replacement rather than another repair:

It’s 10–15+ years old — efficiency falls off with age, and parts get harder to source.
Repairs are stacking up — when the next fix is a large one on an old system, that money is often better put toward a new, efficient unit.
It uses R-22 refrigerant — older systems run on refrigerant that’s been phased out, making recharges increasingly expensive.
Rising energy bills — an aging or oversized system works harder to deliver less comfort.
Uneven cooling or a house that never quite dehumidifies — common with a system that’s the wrong size for the home.

Right-sizing matters more than the brand on the box

The most common installation mistake is an oversized system. An A/C that’s too big cools the air quickly but shuts off before it removes humidity — leaving a house that’s cold and clammy, with the equipment short-cycling and wearing out early. We size to the home as it is today, accounting for additions, finished basements and sun exposure, so the system runs the right length of cycle to actually dehumidify. In our humid D.C./Maryland summers, that’s the difference between “cold” and “comfortable.”

Efficiency that pays you back

Cooling efficiency is rated by SEER2 — the higher the number, the less electricity the system uses to deliver the same cooling. Higher-efficiency units cost more up front but lower your summer bills, and we’ll lay out the payback honestly for your home and how long you plan to stay. If your home has rooms a central system can’t reach — or no ductwork at all — we’ll also weigh a ductless mini-split as an alternative or supplement.

What our installation includes

A proper changeout is more than swapping a box: we evaluate the ductwork and airflow, match the indoor and outdoor equipment for rated efficiency, set the refrigerant charge correctly, and verify the system’s performance before we leave. Protect the investment with one of our maintenance agreements — priority service and 20% off repairs keep a new system running at its rated efficiency.

A/C installation FAQs

How much does a new air conditioner cost?

It depends on the size your home needs, the efficiency level you choose, and your existing ductwork — so the honest answer is a free in-home estimate rather than a number off a web page. We’ll size it correctly and quote it clearly, with no surprises.

What size air conditioner do I need?

The right size comes from the home, not the old unit’s label — square footage, insulation, windows, sun exposure and ductwork all factor in. We size it so it runs efficient, even cycles that properly dehumidify, rather than short-cycling.

Should I repair or replace my A/C?

As a rule of thumb, if the system is 10–15+ years old and facing a major repair — or it still uses R-22 refrigerant — replacement with a high-efficiency unit usually pays back in lower bills. We’ll give you a straight comparison for your system.

What SEER2 efficiency should I choose?

Higher SEER2 means lower running costs but a higher purchase price. The sweet spot depends on how long you’ll stay in the home and your summer usage — we’ll show you the payback rather than just upselling the biggest number.

Do you offer free estimates on a new system?

Yes — request a free estimate online or by phone and we’ll size and quote the right system for your home.

Ready to talk about a new system? Request a free estimate or call our local team. See our full air conditioning services, consider a ductless mini-split, or check the areas we serve.