AC Installation Quotes: 10 Things to Check Before You Sign

Quick answer: Before signing an AC installation quote, check for exact model numbers, a load calculation, a matched indoor coil, the refrigerant type, line set plans, electrical and drain work, duct repairs, permit and inspection, removal of the old unit, and written warranty terms. If any of these are missing, ask for them in writing. The lowest quote may simply leave out necessary work. We give free written estimates and $500 off a new system (terms apply). See AC installation and replacement.

A new air conditioner is a big purchase, and quotes rarely look alike. One may be a single line with a price, and another could run two pages. Here are ten checks that help you compare them fairly and avoid surprises.

1. A real load calculation

The right size depends on your home's square footage, insulation, windows, air leaks, orientation and more. Ask how the size was chosen. "We matched what you had" isn't a good enough answer, because your old system may have been oversized from the start.

An oversized AC cools quickly but doesn't run long enough to remove humidity, which leaves your home cold and clammy. That matters in New Jersey summers. See how to size a system and humidity control.

2. Exact model numbers

"3-ton, 16 SEER2 system" isn't enough. A quote should list model numbers for:

• The outdoor unit
• The indoor coil or air handler
• The furnace, if it's being replaced
• The thermostat

With model numbers, you can check the ratings and compare quotes fairly.

3. A matched system

The outdoor unit and indoor coil need to be an approved match to reach their rated efficiency. Ask for proof, such as a matching certificate from an industry directory or the manufacturer. Also ask whether your existing blower can provide the right airflow. See replace the outdoor unit only or the whole system.

4. Refrigerant type

Newer systems use lower-GWP refrigerants such as R-454B or R-32. Ask which one your system uses, whether the line set and coil are compatible, and how that affects service in the future. See HVAC refrigerants explained.

5. Line set plan

The copper lines connect the indoor and outdoor units. A quote should say whether they'll be:

• Replaced: usually the cleanest choice when access allows
• Reused and cleaned: possible if they're the right size and in good condition

Older lines hidden in walls may be hard to replace, so ask about the trade-offs. Line sets also need proper insulation and protection.

6. Electrical work

Check for:

• A new disconnect and whip at the outdoor unit
• The correct breaker size for the new equipment
• Any panel or circuit updates
• A surge protector, if you'd like one

Older homes may need more electrical work than newer ones, especially if central air is new to the house. See central air in older homes.

7. Drain and safety switch

Your indoor coil makes water all summer. A quote should cover the condensate drain and, particularly with attic units, a drain pan and safety float switch. An overflowing attic pan can damage ceilings. See AC leaking water inside.

8. Ductwork and airflow

New equipment can't fix bad ductwork. A quality contractor will measure or at least inspect airflow and tell you about leaks, undersized returns or crushed runs. If there's a problem, the quote should say whether it's included. See duct sealing and uneven temperatures.

9. Permit, inspection and cleanup

New Jersey towns generally require a permit and inspection for AC replacements. Your quote should say who handles them. It should also cover:

• Removal and disposal of old equipment
• Proper recovery of the old refrigerant
• A pad or stand for the outdoor unit
• Restoring any wall penetrations

Be cautious of anyone who suggests skipping the permit to save money.

10. Warranty terms

Ask for written details on:

• Parts warranty: length, and whether registration is required
• Labor warranty: what the installer covers, and for how long
• Conditions: maintenance requirements and who can service it
• Who to call if something goes wrong

A warranty you don't understand won't help you later.

A quick comparison table

Use this to line up your quotes:

Red flags

• A price over the phone with no visit
• No model numbers
• Pressure to sign today, especially "today only" deals
• No license number: in New Jersey, HVACR work requires a licensed contractor
• "We just add more refrigerant" as the answer to every problem
• No mention of a permit
• Cash-only deals

Questions about the people doing the work

1. Are you licensed in New Jersey? What's your license number?
2. Is your own team doing the install, or subcontractors?
3. Who will test the system, and how?
4. Will someone walk me through it when you finish?

We work under NJ Master HVACR License 19HC00767800, with our own team and never subcontractors. See how to choose an HVAC contractor.

What good commissioning looks like

Installation isn't finished when the unit turns on. Good commissioning includes:

• Pressure testing and pulling a deep vacuum
• Charging by weight and verifying with superheat or subcooling
• Checking airflow and temperature drop
• Testing the drain and safety switch
• Setting up the thermostat

See new HVAC installation: what to expect, AC replacement cost factors and the best time to replace your AC.

How to use the quotes you collect

Once you have two or three quotes, follow these steps:

1. Fill in the comparison table. Blank boxes show you what to ask next.
2. Ask each contractor about any gaps. Good contractors will gladly clarify.
3. Compare the same equipment level. A higher-efficiency system should cost more, so don't judge it against a basic one on price alone.
4. Look at how they treated your home. Did they measure, inspect the ducts and answer questions?
5. Check the license number. You can verify it through the New Jersey Division of Consumer Affairs.
6. Choose the best value, not simply the lowest number.

A system should serve you for many years, so a small difference in price matters far less than a correct installation.

Timing your quote

You don't need to wait for your AC to fail. Asking for an estimate in the off-season gives you time to compare, and a written quote gives you a plan if the old unit gives out next summer.

Keep the winning quote, your permit paperwork and the warranty registration together, so everything is easy to find later.

Why homeowners choose us

We're family-owned and veteran-owned, and our own licensed team does the work, never subcontractors. You get same day service, a 24/7 emergency line, upfront pricing with no hidden fees, and service on every brand.

Free AC installation quotes near you

We give clear written quotes with model numbers and no hidden fees, across all 153 towns in Ocean, Monmouth, Burlington and Middlesex counties. That includes Wall Township, East Brunswick, Edison and Moorestown.

Book your free estimate online or call (732) 779-7106. Save $500 on a new system (terms apply).