Commercial HVAC Maintenance in Charleston, SC

Commercial HVAC maintenance in Charleston means looking at the parts that usually fail, on a date you choose instead of a date the unit chooses. Aero Air Techs looks after light commercial equipment in offices, shops, restaurants and churches. You get the tasks below and a plain report on each unit.

Run time is the reason it pays here. North Charleston logged 2,598 cooling degree days in 2025 against a normal of 2,434, according to the National Weather Service. A cooling degree day is a simple measure of how hard the weather pushed the AC, so that year asked more of every unit than a typical one.

What a planned maintenance visit covers

Each unit gets the same list, and the report shows the result item by item.

Area	What gets done
Filters	Checked or changed, size and date logged
Belts and blower	Tension, wear, pulley alignment and bearing noise
Coils	Condenser and evaporator inspected, cleaned where needed
Drains	Pan, trap and line cleared and flow tested
Electrical	Contactors, capacitors, motors and connections tested
Refrigerant side	Pressures and temperatures read against the unit's data
Controls	Thermostat schedule, sensors and safeties checked
Heat section	Burners, flue and safeties on gas units, or strips on electric
Cabinet	Panels, fasteners, corrosion and curb or pad condition

What the visit leaves out

Maintenance finds problems, and fixing them is a separate step. That split keeps the visit predictable for whoever signs off on the budget. Replacement parts beyond filters and belts agreed in advance, leak repair, duct work and indoor air quality upgrades such as air purifiers and filtration are quoted separately. Large central plant equipment is outside what this page covers.

Commercial HVAC maintenance in Charleston by building type

The checklist stays the same, but the emphasis shifts with how the space gets used.

• Offices. Keep the schedule matched to real hours, and watch small server closets.
• Retail. Open doors bring in humid air and dust, so filters and coils load quicker.
• Restaurants. Cooking grease finds its way to filters and coils, so plan more frequent checks and look at air balance with the hood.
• Churches. A sanctuary may sit idle all week, so humidity builds in the quiet days. Check the thermostat start time before a full Sunday.
• Small multi-tenant buildings. Each unit should be matched to its tenant space on paper.

No rule sets the frequency for a small building. Twice a year is a common starting point, with commercial filter service on a shorter cycle. Our guide on how often to change an HVAC filter explains the logic.

What belongs in a preventive maintenance contract?

No plan with fixed terms or prices appears on this site. Ask about recurring visits by phone and we will say what is possible for your building. Before you sign an HVAC service agreement with anyone, make sure it answers these questions.

• How many visits a year, and in which months?
• Which tasks, written out per unit?
• Are filters and belts included or billed separately?
• What happens when a visit finds a repair?
• Who gets the report, and in what form?
• How does either side end the agreement?

ASHRAE Standard 180 gives a useful yardstick. ASHRAE describes it as a standard practice for inspecting and maintaining commercial HVAC systems, written to look after the whole system and not just each part. A small building does not need the full formal program, but a written list per unit borrows the right idea.

Rules sit behind the schedule too. South Carolina's Contractor's Licensing Board oversees commercial mechanical work under LLR, so check any vendor on the license lookup. EPA Section 608 covers everyone who handles refrigerant. If maintenance leads to a change-out, the City of Charleston's Form 5.1 lists a Mechanical Test and Balance Report among its inspection items, so keep unit tags and airflow records where a future contractor can find them.

Property manager HVAC: how to stay on top of several buildings

One person owning the schedule beats any software. Set up four simple things.

1. Build a unit list. Address, unit tag, model, serial, filter size and the space served.
2. Set the calendar. Spring and fall dates per building, with tenant notice built in.
3. Agree who approves. Name a dollar limit and a person, so repairs do not stall.
4. File every report. One log per unit, kept with the property.

Our preventive maintenance checklist for property managers goes through these in more depth.

How does a planned visit run, and what sets the price?

1. We confirm the unit list and access. Roof hatches and keys come first.
2. We work the checklist. Units get tested with the power isolated where needed.
3. We report by unit. You see what passed and what needs attention.
4. We quote anything extra. Nothing goes ahead without approval.
5. We set the next visit. The next spring or fall date goes on your calendar.

Price depends on the number and type of units, how they are reached, filter sizes and counts and how often you want visits. Refrigerant work falls under EPA Section 608, the federal rule against venting that also sets a certification duty for technicians, so ask any contractor about it. Ask the manufacturer what upkeep its warranty expects.

Why plan your visits with Aero Air Techs

• 4.9 on Google, based on 16 reviews in October 2026.
• A clear, upfront quote for anything beyond the agreed visit.
• Attention to detail. Laverne S. wrote, "Paid attention to detail."
• Open 24 hours, 7 days a week, per Google, if a unit quits between visits.

Based in Charleston, we plan visits for buildings in Hanahan, James Island, Johns Island, Ladson and other nearby places. When something fails before the next visit, start with commercial HVAC repair. Owners of roof equipment should also read rooftop unit service.

A visit calendar should reflect where each building sits.

• Hanahan: our shortest trip, about 18 minutes, which suits buildings needing several short visits.
• North Charleston: about 22 minutes, and a good base route for portfolios that spread along the highway corridors.
• James Island: add a coil rinse for rooftop units near the marsh.
• Johns Island: new tenant spaces need a unit list from day one.
• Ladson: three counties meet here, so record which one each building sits in.
• Mount Pleasant: plan around Ravenel Bridge and US 17 traffic when tenants need early access.
• Goose Creek: keep business license and permit details with the file, as the city asks for them.
• Summerville: spring pollen can shorten filter life, so check counts before the first long run.