What does commercial HVAC maintenance include?

Commercial HVAC maintenance typically includes changing or inspecting filters, cleaning coils, checking belts and motors, inspecting electrical connections, testing controls and thermostats, clearing condensate drains and checking refrigerant and system performance. The exact scope depends on the type of equipment, the size of the building and what the maintenance agreement says, so ask for the list in writing.

For a business, a failed system means uncomfortable employees, unhappy customers and sometimes spoiled inventory. Planned maintenance is how building owners and managers catch small problems before they turn into a shutdown on the hottest day of a Tulsa summer or the coldest night of a cold snap.

Why is commercial maintenance different from residential?

Commercial buildings usually have larger, more varied equipment: rooftop packaged units, split systems, air handlers, chillers, boilers or heat pumps, along with ventilation and control systems. They run longer hours, serve more people and often have more than one unit that must work together. A restaurant, a medical office, a church and a warehouse all have different needs.

That variety is why no single checklist fits every building. A good maintenance plan starts with an inventory of the equipment and a decision about how often each piece needs attention.

What does a typical visit cover?

Here is what a technician commonly handles, depending on the equipment.

• Air filters. Replaced or inspected on a regular schedule. Dirty filters restrict airflow, raise energy use and strain motors.
• Coils. The evaporator and condenser coils are inspected and cleaned as needed. Dirt on coils reduces cooling and heating performance.
• Belts and pulleys. On belt-driven blowers, belts are checked for wear, cracking and proper tension, and replaced when needed.
• Motors and bearings. Checked for noise, heat and lubrication needs.
• Electrical connections. Tightened and inspected, along with capacitors and contactors that wear out over time.
• Refrigerant circuit. Pressures and temperatures are checked to confirm the system is operating as designed. Low refrigerant points to a leak that needs attention.
• Condensate drains. Cleared so water does not back up and damage ceilings or shut the unit down.
• Thermostats and controls. Tested for correct operation and schedules, including setbacks for after hours.
• Economizers and dampers. On equipment that has them, outside air dampers and their controls are checked, since a stuck damper wastes energy or hurts comfort.
• Heating components. Gas burners, ignitors, flame sensors and heat exchangers are inspected on gas heating equipment, and safety controls are tested.
• Ductwork and vents. Accessible sections are checked for obvious leaks, damage or blockages.
• Rooftop condition. Unit curbs, panels, fasteners and the area around rooftop units are inspected for damage and debris.

Triad Heating and Air provides commercial HVAC service for businesses in Tulsa and nearby towns, and it also works on commercial refrigeration, which has its own maintenance needs.

How often should commercial equipment be serviced?

The general recommendation is at least twice a year: a cooling check in spring and a heating check in fall. Heavy-use buildings such as restaurants, or buildings with sensitive equipment, may need more frequent visits, and filters in dusty environments may need changing monthly. The right frequency depends on the equipment, the building and how much downtime your business can tolerate.

What are the benefits of planned maintenance?

• Fewer breakdowns. Worn parts are found before they fail.
• Lower energy use. Clean coils, fresh filters and correct airflow let equipment work efficiently.
• Longer equipment life. Rooftop units and condensing units are expensive to replace.
• Better comfort and air quality. Employees and customers notice stuffy or uneven spaces.
• A record of the equipment. Service notes show what has been done, which helps with planning budgets and replacements.
• Easier warranty compliance. Some manufacturers expect documented maintenance to honor parts coverage. Check the terms of your equipment.

What should you ask before signing a maintenance agreement?

Whoever you hire, a few questions help avoid surprises.

• What exactly is included per visit? Ask for a written checklist by equipment type.
• How many visits per year, and when?
• Which items are covered and which are billed separately? Filters, belts, refrigerant and repairs are often separate.
• How is the work documented? Service reports per visit are useful.
• What happens if a repair is needed? Ask how findings are reported and approved.
• What equipment is covered? Confirm every unit is listed, including small split systems and exhaust or makeup air equipment.
• How can you reach the company when something goes wrong? Get the contact details in writing.
• What are the terms for renewing or ending the agreement?

What can a building manager do between visits?

A few simple habits make a difference.

• Keep rooftop and outdoor units clear. Remove debris, and keep plants and stored items away.
• Do not block vents and returns. Furniture and stock can restrict airflow.
• Pay attention to complaints. A cold spot, a noise or a smell is useful information for the technician.
• Report water. Stains on ceiling tiles often point to a drain problem.
• Keep thermostat schedules current. Operating hours change, and the controls should too.
• Note when equipment is getting old. Systems past about 10 to 15 years or repaired frequently deserve a conversation about replacement planning.

What about commercial refrigeration?

Walk-in coolers, reach-ins and ice machines are separate systems with their own checks, such as condenser coil cleaning, door gaskets, defrost operation and temperature monitoring. If your business depends on refrigeration, ask whether it can be included in the same plan. Triad Heating and Air lists commercial refrigeration among its services.

Triad Heating and Air has served the Tulsa area since 2000, and you can see the towns it covers on the service areas page. To talk through a maintenance plan for your building, call (918) 992-2105.