Good steps to take when you're looking for an air conditionining pro include:

• Verify their license and insurance: Most pros need an HVAC contractor's license and general liability insurance. Requirements can vary by region, so it’s a good idea to check what’s needed in your area.

• Get several estimates: A proper estimate should be a written document that details the costs for the AC unit, labor, and any extra materials. It should also outline the full scope of work and a project timeline.

• Read their reviews: Look for reviews that mention professionalism, timeliness, and a clean work area. Red flags include frequent complaints about surprise fees, property damage, or systems that needed follow-up repairs.

• Look at their portfolios: Check their past work for projects similar to yours. Look for photos that show clean, organized installations with neatly run lines and securely placed indoor and outdoor units.

• Find out if they have warranties: Ask about two types of warranties: a manufacturer's warranty that covers the AC unit and a workmanship guarantee from the installer that covers their labor.

• Ask important questions: How will you determine the right size AC unit for my home? Does your quote include removing my old unit? What kind of follow-up support or guarantees do you offer?

There are several factors that might impact the cost of this project, including:

• Unit type and size: The kind of air conditioner you choose, such as a central air system versus a ductless mini-split, will affect the price. The unit's size and cooling capacity also play a big role in the overall cost.

• Existing ductwork: If your home already has compatible ductwork in good condition, the installation can be simpler and less expensive. Projects that require creating or replacing ductwork will have higher labor and material costs.

• Energy efficiency: Units with a higher Seasonal Energy Efficiency Ratio (SEER) rating typically cost more upfront but can lead to lower energy bills over time.

• Installation complexity: The difficulty of the job can influence the final price. For example, installing a unit in a hard-to-reach attic or tight crawlspace may require more time and labor.

• Labor and permits: The cost of labor can vary by location and a professional’s experience. Your project may also require local permits, which come with their own fees.

It usually takes a few hours for a professional to install an air conditioner, depending on factors like:

• Type of unit: Installing a full central air system is more complex and time-consuming than setting up a ductless mini-split system.

• Existing infrastructure: The project will take longer if your home needs new ductwork or significant electrical upgrades to support the new unit.

• Accessibility: It can take more time for pros to work in hard-to-reach areas like tight attics or crawlspaces.

• System size and complexity: Larger homes that require more powerful or intricate AC systems will naturally extend the installation timeline.

• Old unit removal: Safely disconnecting, removing, and disposing of your old air conditioner adds time to the overall job.

Remember: The timeline for your project will vary depending on many factors. Always ask your pro to provide an estimate.

To find an appliance installer near you, start searching on Thumbtack. This way, you see a list of nearby pros offering services and compare based on their customer review, ratings and profile pages. You can also find customer-uploaded photos showing pictures of the pro’s work. 

Check for licensing requirements in your state, and make sure whoever you work with abides by them. Finally, contact several different pros to compare their rates.

You can tip appliance installers if you feel their service has gone above and beyond. A standard tip is between $10 and $20. 

Reasons you might consider tipping include a very pleasant customer service demeanor, having to carry a heavy appliance up or down the stairs, working in inclement weather, taking care not to make a mess and other acts of care and consideration. You are not obligated to leave a tip — but one is always appreciated.

During your pro’s visit, you may expect them to start by assessing your home to confirm the plan for the new unit. This includes checking your electrical setup, ductwork, and the spot where the outdoor condenser will go. After preparing the work area to keep things tidy, they’ll usually install the indoor and outdoor components and connect all the necessary lines. Finally, you can expect the installer to test the system to ensure it’s cooling correctly and show you how to operate your new unit.

Your air conditioner typically needs regular filter changes, usually every one to three months, to keep it running efficiently. You'll also want to have a professional check the refrigerant levels and clean the coils annually. This simple maintenance can help prevent future breakdowns and keep your home cool.

Cost-savings tips include:

• Get multiple quotes. Comparing bids from several qualified professionals is the best way to ensure you’re getting a fair and competitive price for your project.

• Choose the right size. Work with your pro to find a unit that’s properly sized for your home, as an oversized or undersized unit can be inefficient and increase your energy bills.

• Look for rebates. Ask your installer about potential manufacturer rebates or federal tax credits, which are often available for high-efficiency models.

• Schedule during the off-season. You may find more flexible pricing if you book your installation during the spring or fall when HVAC companies are typically less busy.

• Do your own prep work. Simple tasks like clearing furniture and debris from the installation area can help reduce the technician's labor time.