Seasonal tune-up and full diagnostic on your Carrier, Trane, or Goodman system - readings shown to you before any repair is proposed
Diagnosis first, numbers second - you approve the repair price before a single part goes in.
Before
After
Before
After
Before
AfterFast, Reliable AC Installation Across Longwood
New AC installation in Longwood typically runs $3,500-$7,500 for a standard split system or heat pump, and every quote we write starts with a duct-blaster test and load calculation, not a box swap. We’re the local AC Installation team that serves Longwood from our Miami-area dispatch office, with crews running daily to Seminole County neighborhoods like Sabal Point, Wingfield North, and the wooded lots along Markham Woods Road. Call (817) 402-2972 for a free written estimate with a fixed price before any work begins.
Why Coldharbour Heating & Air Is Longwood’s Preferred AC Installation Company
We’ve been working in Longwood long enough to know that a new condenser on a 1978 ranch without checking the attic duct is a callback waiting to happen. Our technicians carry duct-blaster gear on every sales call because we’ve learned what the housing stock here demands. Longwood homeowners get the same written promises that define the Kingswell network: a price before the first tool comes out, a firm arrival window, a clean job site, and the 365-Day Done Right Promise on every repair.
Phones are answered by a live person 24 hours a day, 7 days a week. No voicemail trees. No “call back in the morning” when your system quits on a July Saturday. Our background-checked, uniformed technicians are trained on nine major residential HVAC brands, so the person who shows up at your Longwood door can work on whatever system is already in the home.
We coordinate dispatch and scheduling from our Miami office, but our crews live and work in the Seminole County area. That local presence means we understand the specific headaches of Longwood’s 1970s-80s suburban buildout: attic air handlers cooking in 130°F heat, brittle flex duct that was never designed for four decades of that punishment, and wooded lots that change cooling loads in ways a nameplate tonnage figure won’t capture.
HVAC Installation in Longwood
HVAC Installation in Longwood is rarely just an equipment swap. The typical home here is a single-story slab ranch or split-plan built between 1972 and 1995, with an attic-mounted air handler and original or once-replaced flex ductwork now sitting in attics that routinely exceed 130°F in summer. That combination of extreme attic heat, degraded duct insulation, and near-year-round cooling demand means duct system failure and full duct replacement, not just a new condenser, is the dominant job type here. A standard split system installation runs $3,500-$7,500, but the final number depends on whether we’re sealing existing ducts or replacing them entirely.
Load Calculation Before Tonnage
We never size a replacement by the old unit’s nameplate. Longwood’s wooded, wind-sheltered lots and 1970s-era building envelopes don’t match the assumptions baked into that original rating. An oversized system short-cycles, never runs long enough to dehumidify, and leaves you with 65-70% indoor relative humidity even when the thermostat reads 72°F. We run Manual J load calculations on every install.
Rural Fuel Considerations
Many properties around Longwood, especially on larger wooded lots off Markham Woods Road or near the Wekiva River basin, have no natural gas available. We size and quote propane systems and heat pumps for these homes, and we verify fuel availability before writing a fixed-price proposal. The wrong fuel choice paired with a mismatched SEER2 rating drives callbacks all summer.
Heat Pump Installation in Longwood
Heat Pump Installation in Longwood has become the default recommendation for homes without natural gas access, and increasingly for homes with aging propane systems where homeowners want to stop managing tank refills. A heat pump moves heat rather than generating it, which handles Longwood’s mild winters efficiently while providing full air conditioning through the ten-month cooling season. The installed cost matches a standard split system at $3,500-$7,500, and modern cold-climate heat pumps perform well even on the handful of nights each year that dip near freezing.
SEER2 and Humidity Control
Longwood’s June-September wet season pushes indoor humidity into the danger zone for mold and comfort. A properly sized heat pump with a variable-speed air handler runs longer cycles at lower capacity, pulling moisture out of the air instead of blasting cold air for ten minutes and shutting off. We commission every heat pump install with a subcooling check and thermostat calibration to verify dehumidification performance, not just temperature drop.
Propane-to-Heat Pump Conversions
On rural Longwood properties where propane has been the only option, we handle full fuel-switching projects: electrical service verification, disconnect of the propane furnace, and proper heat pump sizing for the home’s actual envelope. We also flag when a propane backup furnace makes sense for the few nights a year that drop below a heat pump’s balance point.
Trusted Brands We Service in Longwood
Our technicians train annually on nine major residential HVAC brands: Carrier, Trane, Lennox, Goodman, Rheem, York, Daikin, Bryant, and American Standard. For Longwood customers, that means we stock common parts and can source equipment quickly through our Miami-area supply chain. We install Rheem and York systems regularly for their value in the Longwood market, and we specify Daikin and Bryant when a homeowner wants advanced inverter-driven variable capacity for humidity control on those wooded, wind-shelded lots where standard single-stage equipment struggles.
Common AC Installation Problems We See in Longwood Homes
- Original flex duct disintegrated in the attic. In Sabal Point and Wingfield-era homes, the original ductwork has become so brittle after decades in 130°F-plus attics that boot collars have separated completely. We find 20-30% of conditioned air dumping straight into the attic on visual inspection alone.
- Short-cycling from oversizing. A contractor who copies the old nameplate tonnage without a load calculation installs too much capacity for a shaded Longwood lot. The house cools fast but never dehumidifies, and the compressor takes a beating from constant starts and stops.
- Wrong fuel assumption on rural properties. Quoting a gas furnace or oversized system for a home on a wooded Longwood acreage where natural gas never reached the street. We verify fuel availability before the first visit.
- Detached workshops with no conditioning. Rural Longwood properties often have outbuildings, garages, or equipment sheds where owners want climate control. We size mini-split systems for these spaces separately from the main house load.
Pricing for AC Installation in Longwood, FL
| Service | Price Range |
|---|---|
| AC Installation (standard split system) | $3,500-$7,500 |
| Heat Pump Installation | $3,500-$7,500 |
Those ranges cover equipment, labor, and basic materials for a typical Longwood single-story ranch. What moves a job toward the higher end: full duct replacement instead of sealing, electrical panel upgrades for heat pump conversions, or refrigerant line sets that need complete replacement after 40 years in the wall. We provide a written, itemized fixed price before any work begins. That price does not change at the door. Estimates are free, and we encourage homeowners to compare our written quote against verbal estimates that leave room for surprises.
We Also Serve Cities Near Longwood
Our crews run daily throughout Seminole County and into northern Orange County. We handle AC Installation in Longwood and the surrounding communities of Lake Mary, Altamonte Springs, Casselberry, and Winter Springs. Each area gets the same Kingswell standards: written price, written guarantee, firm arrival window, and clean job site.
Serving Longwood, FL - Our Local Coverage Area
We’re based in the Longwood area and know this community well. Use the map below to see our service coverage - if you’re nearby, we can almost certainly help.
FAQs About AC Installation in Longwood
A heat pump is usually the better choice for a Sabal Point home without natural gas, especially if you’re tired of managing propane tank refills. Modern heat pumps handle Longwood’s mild winters efficiently and eliminate fuel delivery entirely. Call (817) 402-2972 and we’ll verify your electrical service capacity and run a load calculation that accounts for that afternoon sun exposure.
You don’t have to, but we strongly recommend it and most of our Longwood installs include at least partial duct replacement. Original flex duct in a 130°F attic loses R-value and structural integrity after 40-plus years, and new equipment connected to failing ductwork will short-cycle, under-deliver, and fail to dehumidify. We run a duct-blaster test on every quote so you can see the leakage numbers before deciding. Call (817) 402-2972 for a free estimate.
High humidity after a new install almost always means the system is oversized for the actual cooling load or the ductwork is leaking conditioned air into the attic. Longwood’s wooded lots and 1970s building envelopes require accurate load calculations, not nameplate copying, and the June-September wet season will expose any sizing error within the first month. We commission every install with subcooling verification and thermostat calibration to confirm dehumidification performance.
Yes, we install mini-split systems sized separately for outbuildings, garages, and equipment sheds on rural Longwood lots. These spaces have different loads than the main house, especially if they’re uninsulated or exposed without wind shelter. We run a separate load calculation and specify equipment matched to that space’s actual use.
A breaker trip on hot afternoons usually indicates a failing compressor, dirty condenser, or electrical issue that may be repairable, but in Longwood’s 1970s-80s housing stock we always inspect the full system before recommending repair versus replacement. If the unit is 15-plus years old and the ductwork is original, replacement often makes more financial sense than chasing intermittent electrical faults. Call (817) 402-2972 and we’ll diagnose it properly, with a written repair price and a replacement option if that’s the smarter long-term choice.
Written by Victor Mancini, Owner at Coldharbour Heating & Air, serving Longwood and Seminole County since 2003.