Commercial HVAC contractors specialize in large HVAC and mechanical, electrical and plumbing (MEP) projects, usually in office buildings, hospitals, schools and similar locations. If you have a commercial project that requires HVAC work, there are several benefits to working with a contractor, including:

• Experience and skills: Contractors have experience installing and maintaining large commercial HVAC systems, and they’re used to working alongside other crews on big construction projects. They tend to have the project and contract management skills required to do the job right. 

• Relationships with manufacturers: Commercial HVAC contractors usually have relationships with big manufacturers and distributors, which can be helpful if special parts are needed for your system.

• Bigger crews for bigger projects: They usually have multiple crews and technicians, so they can handle larger projects and complete them in a timely manner.

• Peace of mind and safety: Commercial HVAC contractors can usually provide all necessary licenses, insurance and bonding to work on large construction sites. They also should have documented health and safety plans, QA processes, environmental management protocol and other commercial construction site essentials.

First, make sure you’re narrowing your search to contractors that specifically handle commercial projects. Most residential HVAC companies aren't set up or qualified to work on commercial projects. 

Next, always ensure that your contractor is licensed to work in your area and that they have the necessary insurance to protect against property damage and bodily injury. 

Some HVAC manufacturers require or recommend that the companies that work on their equipment undergo special training. Check with the manufacturer if this is the case for your system. Many manufacturers have a list of installers or technicians approved to work with their equipment. 

Be sure to read reviews of any company you consider. Good commercial HVAC contractors should be able to provide you with a list of similar projects they've completed, including contact information for a project manager or similar individual.

For more tips, visit our Smart Hiring guide.

Commercial HVAC projects that involve installation or replacement cost around $2,000 to $8,250* on average, according to Thumbtack data. However, it’s not uncommon for projects to cost tens of thousands of dollars.

How much you’ll pay ultimately depends on various factors, such as: 

• The size and complexity of the project 

• What materials and parts are needed

• Labor rates in your area

Keep in mind that commercial HVAC contractors tend to be more expensive than those who work on residential projects because the systems are larger and more complex.

*Data on file at Thumbtack. For a personalized cost estimate, request a quote from a professional.

Commercial HVAC contractors can install, maintain, repair and replace the complex heating, ventilation and air conditioning systems that keep your building comfortable year-round. 

Common commercial HVAC services include:

• Changing or cleaning air filters

• Checking parts for signs of corrosion or wear

• Fixing electrical components

• Lubricating the compressor and fan motors

• Adding more refrigerant if necessary

• Evaluating indoor air quality and suggesting improvements

• Inspecting and cleaning ducts

• Troubleshooting issues with thermostats and other sensors

• Installing and fixing automation systems

• Cleaning integrated humidifiers

• 24/7 emergency repairs

Some commercial HVAC contractors can also design commercial systems for new buildings or renovations.

It might be time to replace a commercial HVAC unit if it’s been running for about 15 to 20 years and hasn’t been able to maintain a consistent temperature recently. You may also want to replace your unit if: 

• You see higher utility bills than normal.

• Your unit requires frequent repairs.

• Some areas of the building feel much colder or warmer than others.

• Your unit makes loud noises, produces odd smells or has corroded materials and leaking fluids.

• The unit blows air constantly but never seems to reach the temperature on the thermostat — especially if you aren’t experiencing extreme outdoor temperatures. 

A commercial HVAC contractor can evaluate the system and help you decide the best course of action.

Commercial HVAC installation can take anywhere from a few days to several weeks, depending on:

• Type of unit: For small shops and restaurants, a mini-split is often sufficient and the fastest and easiest type to install. Larger industrial or office buildings require more complex systems like central units or multi-splits.

• Existing ductwork: Mini-split systems don’t require ductwork, but central units and larger multi-split systems do. Installing or replacing ductwork can add days to the installation project.

• Permitting: Getting the necessary permits from your local building authorities requires an inspection and approval, which can take several days.

Contact local pros to get quotes and timeline estimates for installation.

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