Pentagon Air is a Maryland-licensed HVAC contractor serving Annapolis and the wider Anne Arundel County area. We are based just over the Severn in Bowie, so a tech can be at your Annapolis home the same business day for most calls. Our work is built around three things Annapolis homeowners ask for the most: fast diagnosis, upfront pricing, and repairs that hold up to the bay-side humidity and salt air.
Drive time from our Bowie shop
Annapolis is about a 25-minute drive from our Bowie shop down Route 50, so we keep stocked trucks in the area Monday through Friday. Most Annapolis service calls are booked and resolved inside one visit.
Local climate & home types
Annapolis sits right on the Chesapeake Bay. That means high humidity all summer, salt air that eats outdoor condenser coils faster than inland homes, and tight historic-district homes where ductless mini-splits often make more sense than a full duct replacement. We repair and install with all of that in mind.
HVAC services we offer in Annapolis
AC Repair
Diagnosis and repair for central AC, heat pumps, and mini-splits. Capacitors, contactors, blower motors, refrigerant leaks, drain lines, and control boards.
AC Repair in AnnapolisAC Installation
New central AC and ductless mini-split installs sized to your home's actual cooling load. Great fit for historic Annapolis homes without good duct runs.
AC Installation in AnnapolisHeat Pump Services
Heat pump installation, repair, and refrigerant work. Modern heat pumps handle Annapolis winters and cut energy bills against electric or oil heat.
Heat Pump Services in AnnapolisFurnace Repair
Gas, electric, and propane furnace repair. Ignitors, flame sensors, control boards, blower motors, and safety inspections.
Furnace Repair in AnnapolisThermostat Installation
Nest, Ecobee, Honeywell, and other smart thermostat installs, wired and configured to your system.
Thermostat Installation in AnnapolisDuctwork Services
Duct sealing, repair, and airflow balancing. Common fix for hot upstairs rooms in two-story Annapolis homes.
Ductwork Services in AnnapolisCommon HVAC problems we fix in Annapolis homes
Salt-corroded condenser coils
Homes within a mile or two of the bay see condenser coils pit and leak years sooner than inland units. We clean, treat, and when needed swap to coated coils.
Clogged condensate drain lines
Annapolis summer humidity pulls a lot of water out of the air. Drain lines clog with algae and back up into pans or ceilings. A quick clear-out prevents major water damage.
Capacitor failures after summer storms
Bay-side power flickers and brownouts knock out capacitors all season. A capacitor swap is a same-visit repair.
Tight historic homes with no duct space
Older downtown homes were not built for central air. Ductless mini-splits zone the house without tearing into plaster walls.
Hot second floors
Two-story homes in Wardour, West Annapolis, and Cape St. Claire often have undersized return ducts. Sealing and balancing usually fixes it without a new system.
Annapolis neighborhoods we serve
We cover all of Annapolis and the surrounding Anne Arundel County area, including:
Downtown & Historic District
Tight 18th and 19th century homes around State Circle and Main Street where ductless mini-splits and high-velocity systems usually fit best.
Eastport
Waterfront cottages and townhomes near the Spa Creek bridge where salt corrosion on outdoor units is the number one repair we see.
West Annapolis & Wardour
Mid-century single-family homes with ducted central AC and gas furnaces, common targets for heat pump conversions.
Parole & Admiral Heights
Newer builds and townhomes off Forest Drive where modern heat pumps and smart thermostats dominate.
Annapolis Neck (Bay Ridge, Hillsmere)
Bay-front homes that need corrosion-resistant condensers and twice-a-year coil cleanings.
Cape St. Claire
Bayside community north of the Bay Bridge with a heavy mix of heat pumps and ductless systems.
ZIP codes covered: 21401, 21403, 21409. Landmarks nearby: U.S. Naval Academy, Maryland State House, Annapolis Mall (Westfield), Quiet Waters Park, Anne Arundel Medical Center.
Why Annapolis homeowners choose Pentagon Air
- Maryland licensed and insured HVAC contractor
- Factory-trained on 8 major brands including Carrier, Trane, Lennox, and Mitsubishi
- Written estimate before any repair or install begins
- Coastal-environment experience: coil coatings, corrosion checks, salt-air maintenance
- Local Bowie shop, real local techs, 24-business-hour response guarantee
What HVAC repair costs in Annapolis
Most Annapolis AC repairs in 2026 fall between about $150 and $1,500 depending on the part. Capacitors and contactors are on the low end. Compressor or refrigerant-leak repairs are on the high end. You get a written number before any work starts, and there are no hidden fees.
Want a deeper breakdown? Read our 2026 AC Repair Costs & Common Fixes guide.
What to expect when you call us
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1. Call or book online
Tell us what your system is doing. We confirm an appointment window the same day when we can.
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2. On-site diagnosis
A factory-trained tech inspects the system, runs a diagnostic, and explains what they find in plain language.
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3. Written estimate
You get the repair or replacement price in writing before any work begins. No surprises.
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4. Repair on the spot
Most common parts are on the truck. The system is repaired, tested, and we walk you through what changed.
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5. Follow-up
We check in after the visit and stand behind the workmanship.
"Our AC quit on a 95-degree day in Eastport. Pentagon Air had a tech here that afternoon, found a bad capacitor, and we were cooling again before dinner. Honest pricing, friendly tech."
Annapolis HVAC FAQs
How fast can you get to my Annapolis home?
Most Annapolis calls booked before noon get a same-day visit, Monday through Friday. We are about 25 minutes up Route 50 from our Bowie shop and run trucks through the area daily.
Do you service homes near the water in Eastport and Bay Ridge?
Yes. We work waterfront Annapolis homes every week. Salt-air corrosion is a real issue for outdoor condensers there, so we check coils, fan motors, and electrical contacts on every visit.
My downtown home has no ductwork. Can you still cool it?
Yes. Ductless mini-split systems are the right answer for most historic Annapolis homes. They zone room by room and install without tearing up plaster walls or ceilings.
Do you handle heat pumps that need to cover Annapolis winters?
Yes. Modern cold-climate heat pumps work down well below freezing, which covers Annapolis winters. We install and repair heat pumps from all major brands.
Are you licensed and insured in Maryland?
Yes. Pentagon Air is a fully licensed and insured HVAC contractor in the state of Maryland, and we pull Anne Arundel County permits when the job calls for one.
Do you offer financing for larger jobs in Annapolis?
Yes. For full system replacements or larger repairs we can walk you through financing options so a needed fix does not have to come out of pocket all at once.