Longwood & unincorporated Seminole County, Florida
Air conditioning for Longwood's shaded, mid-century streets
Longwood HVAC repairs and replaces residential air conditioning for homeowners inside the City of Longwood and across the 32750 and 32779 Longwood mailing area. The median Longwood home was built in 1979, so most jobs here are a changeout sitting on top of forty-year-old attic ductwork — and we quote the duct, not just the box.
- 1979Median year built across Longwood's 4,962 improved residential parcels — Seminole County Property Appraiser
- $246.61City residential mechanical change-out permit fee, effective 1 July 2026
- 3:30 p.m.Deadline the business day before, to book a City inspection on 407-260-3471
- All of 32779Carries a Longwood address but permits through Seminole County, not the City
The part of the system nobody photographs
Where your air actually goes
A quote for a changeout usually describes two boxes: the condenser outside and the air handler in the attic. In a house built in 1979 those two boxes are the newest things in the system. Everything between them is as old as the roof.
Air handler, in the attic
In most of Longwood's 1970s and 80s stock the air handler sits on a platform in an unconditioned attic that runs well above 100°F in August. The City's own mechanical permit application asks “IF THIS IS A CHANGE OUT, IS UNIT LOCATED IN ATTIC SPACE” and notes that if the answer is yes, access must be provided. A blocked or missing attic hatch is a failed inspection, not an inconvenience.
Supply trunk and branch runs
The trunk and the flexible branch runs are frequently original to the house. Fifty years of attic heat cycling dries out the mastic and the cloth-backed tape at every joint, insulation compresses where someone has knelt on it, and a run that sags between trusses loses airflow before it loses insulation. This is the part of a changeout most quotes do not mention.
Ceiling registers
Cool air arrives here, so this is where a homeowner judges the system. If one bedroom never keeps up, the answer is almost never the outdoor unit — it is a crushed or disconnected run above that register, and a bigger condenser will not fix it.
One central return
A great many Longwood floor plans of this era were built with a single central return grille. Modern equipment moves more air than those plans were drawn for, and a starved return shows up as a frozen evaporator coil, a whistling hallway and a system that short-cycles. Adding return air is often the cheapest real improvement in the house.
Condenser, under the canopy
Longwood's mature oaks are the reason a condenser here runs hot. A crown that shades the unit also drops leaves and pollen into the coil, and a fouled coil raises head pressure at exactly the moment the outdoor temperature is already doing that. Clearance matters too — a unit boxed in by regrowth cannot reject heat.
Three things that are true here and not next door
Why Longwood is its own job
The canopy
Longwood is inland — roughly twelve miles north of downtown Orlando and nowhere near salt air, so coastal coil corrosion is not the story here. Heat hours, humidity and canopy debris are. Shaded, leaf-fouled condensers with restricted clearance are a routine finding on these lots.
And there is a genuinely useful local answer: the City exempts owner-occupied single-family dwellings from tree-removal permitting entirely, so cutting back the limbs over your pad needs no City permit.
The ductwork
66.5% of Longwood's improved residential parcels were built between 1970 and 1989, with the middle half falling between 1973 and 1987 (Seminole County Property Appraiser CAMA extract). That is the era of attic air handlers, flexible duct in unconditioned space, and a single central return.
New equipment on old duct is the most common way a Longwood homeowner spends eight thousand dollars and stays uncomfortable.
The jurisdiction line
The City's own FAQ says everything west of I-4 with a Longwood address, and every property in ZIP 32779, files with Seminole County rather than the City. Sweetwater Oaks, Wekiva Hunt Club, Sabal Point, The Springs and Innswood all say “Longwood, FL” on the mailbox and none of them are in it.
What you can request
Residential HVAC, matched to a contractor who does it
Six jobs cover almost everything a Longwood house needs. The detail is on the services page.
AC repair
Not cooling, freezing over, tripping the breaker, or running without ever satisfying the thermostat. Your contractor finds the fault before quoting a part.
System replacement & changeouts
A full changeout on Longwood's 1970s and 80s stock is rarely just a box swap. Duct condition, return sizing and attic access all decide the price.
Heat pumps
If your air handler still heats with electric resistance strips, a heat pump conversion is the single change Duke Energy pays the most toward.
Maintenance
Coil cleaning, drain treatment, capacitor and contactor checks. Under Longwood's canopy the outdoor coil is the part that actually needs the visit.
Ductwork & airflow
Leak testing, sealing, replacing collapsed flex, and adding return air where a single central return is starving the system.
Indoor air quality
Humidity control, filtration and ventilation — the part of a Florida system that decides whether 75°F feels cool or feels clammy.
Money on the table
The Duke rebate has to be arranged before the install, not after
Duke Energy will not pay a Home Energy Improvement rebate on equipment that is already in the house. A free Home Energy Check has to have been completed within the previous 24 months, and the work has to be one the check recommended. Replace the system first and apply afterwards and the claim is denied — no appeal, no exception.
Almost no contractor page in this market explains that, which is exactly why homeowners find out too late. It matters more in Longwood than most places: with a median build year of 1979, a large share of this housing stock still heats with electric resistance strips in the air handler, and strip-heat-to-heat-pump is the highest tier Duke publishes.
Before you sign anything
Book the free Home Energy Check first. Then get quotes. Duke also requires that the system be installed by a licensed and insured air conditioning contractor and approved by a licensed city or county inspector — so the Longwood permit and the passed inspection are part of the rebate, not paperwork you can skip.
Questions people actually type
The four questions Longwood homeowners ask first
Do you need a permit to replace an AC unit in Florida?
In Longwood, yes. The City adopted its own Florida Building Code Chapter 1 amendments by Ordinance No. 21-2196, and its list of permit-exempt mechanical work runs to exactly eight items — portable heaters, portable ventilation, portable coolers, piping inside regulated equipment, evaporative coolers, small self-contained refrigeration, load-management devices, and “replacement of any part that does not alter its approval or make it unsafe.” A condenser or air handler changeout alters the approved equipment, so it is not on that list. Statewide, HB 803 (2026) exempts sub-$7,500 single-family work from permitting but expressly carves mechanical work back out, so the exemption never reaches an AC changeout. Full Longwood permit guide.
How long does an AC unit last in Florida?
Ten to fifteen years is the working assumption in Central Florida, shorter than the national figure because the equipment runs close to year-round — the Orlando station logs roughly 3,452 cooling degree days a year on the NOAA 1991–2020 normals. Longwood's median residential build year is 1979 and 66.5% of its 4,962 improved residential parcels were built between 1970 and 1989, so almost every house here is on its second, third or fourth system, not its first. The full answer.
How much does it cost to replace an AC unit in Florida?
Published Orlando-metro guides put a whole-system replacement between $5,800 and $15,500, with $7,500–$10,500 typical for a 1,500–2,500 sq ft home; duct replacement adds roughly $2,500–$6,000. Those are researched market estimates from third-party pricing guides, not our quoted rates. The one hard local number is the City of Longwood permit line: a residential mechanical change-out permit is $246.61 under Resolution 26-1724, effective 1 July 2026. The full answer.
Why is my AC running but not cooling?
In this housing stock the usual order is: a failed run capacitor, a condenser coil packed with oak leaf litter and pollen, a frozen evaporator from restricted return air, or a refrigerant leak. The middle two are Longwood-specific — shaded lots that keep a coil damp and loaded with debris, and 1970s floor plans with a single central return that cannot feed a modern blower. Your HVAC contractor should diagnose the cause before quoting a part, because replacing a capacitor on a starved system just buys a few weeks. The full answer.
Sources
- City of Longwood, 2020 FBC Chapter 1 Administrative Amendments (Exhibit A to Ordinance No. 21-2196), Sections 105.2, 105.2.1 and 107.3. https://www.longwoodfl.org/DocumentCenter/View/4736/2020-FBC-Londwood-Administrative-Amendments-PDF-
- City of Longwood Fee Schedule (Resolution 26-1724, effective 1 July 2026). https://www.longwoodfl.org/702/Fee-Schedule
- City of Longwood Mechanical Permit application. https://www.longwoodfl.org/DocumentCenter/View/4604/Mechanical-Permit-application-PDF-
- City of Longwood, Permitting and Inspections. https://www.longwoodfl.org/169/Permitting-and-Inspections
- City of Longwood FAQ: “Is my address/parcel located within the City of Longwood City limits?”. https://www.longwoodfl.org/Faq.aspx?QID=159
- Florida CS/CS/HB 803 (2026), enrolled text. https://www.flsenate.gov/Session/Bill/2026/803
- Florida Statutes §553.79 — §553.79(1)(a) baseline permit requirement; §553.79(1)(g) the $7,500 single-family exemption and its carve-outs (created by s. 8, ch. 2026-63). https://www.flsenate.gov/Laws/Statutes/2026/553.79
- Florida Statutes §713.135 — Notice of Commencement, including the §713.135(d) exception for HVAC repair or replacement under $7,500. https://www.flsenate.gov/Laws/Statutes/2026/713.135
- Seminole County Property Appraiser CAMA extract (Parcels.csv, dated 5 September 2026), tax district L1 — Longwood; improved residential parcels, DOR codes 01 and 04. https://www.scpafl.org/
- Duke Energy, Home Energy Improvement — HVAC Replacement. https://www.duke-energy.com/home/products/home-energy-improvement/hvac-replacement
- Duke Energy news release, 9 June 2025 — expanded Florida home improvement rebates. https://news.duke-energy.com/releases/duke-energy-expands-home-improvement-rebate-program-to-help-florida-customers-save-energy-and-money-this-summer
- U.S. DOE, 2023 Central Air Conditioner Standards FAQ. https://www1.eere.energy.gov/buildings/appliance_standards/pdfs/2023_CAC_Standards_FAQ_10-5-2022_Final.pdf
- U.S. EPA, HFC restrictions by sector (AIM Act Technology Transitions rule). https://www.epa.gov/climate-hfcs-reduction/hfc-restrictions-sector
- NOAA 1991–2020 climate normals, Orlando station. https://www.ncei.noaa.gov/products/land-based-station/us-climate-normals
Figures are dated. Permit fees, rebate amounts and code cycles change — re-check the primary source before you rely on a number here.
Get a real look at the whole system, not just the box
We measure the return, check the trunk and branch runs, and read the condenser's clearance before pricing anything. If the ducts are the problem, replacing the equipment is the expensive way to find out.