About This Service
AC System Installation in Middleburg, FL & Clay County
All Set Heating, Air & Plumbing is an HVAC contractor in Middleburg, FL providing air conditioning system installation and replacement to homeowners across Clay County, Duval County, and Northeast Florida. We perform Manual J load calculations to correctly size every system — oversized and undersized AC units are among the most common causes of comfort problems and high utility bills in Northeast Florida. We install Amana, Carrier, Lennox, Rheem, Daikin, Goodman, Bryant, and American Standard systems, and every installation includes our 10-year parts warranty, startup and commissioning, and a written report of the work performed. Optional 10-year parts warranty available with Yeti Club membership.
What's Included in AC System Installation
From load calculation to startup — the complete installation process, documented and warranted.
Typical installation cost: $4,500–$12,000+ depending on system size, brand, and any ductwork modifications required.
Florida-Specific
Why Florida AC Sizing Is Different From Anywhere Else
Most sizing guides are written for moderate climates. In Middleburg and Clay County, humidity is as much a comfort concern as temperature — and that changes everything about how a system should be selected.
Manual J Load Calculation
The proper way to size a residential AC system. It accounts for ceiling height, insulation, window placement, south/west glass exposure, occupants, internal heat sources, and local climate. All Set performs this calculation before recommending any equipment. If a contractor suggests a size based only on square footage, that's a warning sign.
Latent Load vs. Sensible Load
Sensible load is the heat your AC removes to lower temperature. Latent load is the moisture it removes. In Middleburg, where humidity exceeds 70% most of the year and peaks above 80% in summer, your system handles a disproportionately high latent load. A system sized with northern assumptions will cool to the right temperature but still feel humid and uncomfortable.
Variable-Speed Compressors
A single-stage compressor runs at full capacity or shuts off. On mild days it cools the air too quickly without running long enough to remove humidity — the home hits 74° but feels like 78°. A variable-speed compressor adjusts output and runs longer cycles, removing much more moisture. In Florida's climate, the difference is noticeable every day.
Coastal Corrosion
For homeowners within ten miles of the coast, salt air accelerates corrosion on outdoor coils and cabinet parts. Standard aluminum and copper coils will show damage much faster in a coastal environment. All Set advises coil coating treatments for coastal setups — a small initial cost that significantly extends equipment lifespan in the First Coast area.
Our Process
The Right System, Installed Correctly, Backed by a Real Warranty
We Assess What Your Home Needs
All Set performs a full Manual J load calculation before selecting any equipment. The result is a system recommendation based on your home's actual data — not an estimate based on square footage alone.
You Choose From Honest Options
Clear equipment options with honest trade-offs explained. All Set installs Daikin, Carrier, Lennox, Trane, Goodman, Bryant, and American Standard. The recommendation reflects what makes sense for your home and budget — not what yields the highest margin.
We Install It Right & Back It With 10 Years
Every installation is completed to manufacturer specifications — refrigerant charge, electrical connections, duct sealing, and airflow testing. Enroll in the Yeti Club middle tier and the labor warranty extends to match the parts warranty: up to 10 years.
Why Clay County Chooses All Set
10-Year Parts Warranty Included
Every equipment installation is backed by our 10-year parts warranty — included at no extra cost. The matching 10-year labor warranty must be purchased as an upgrade through Yeti Club membership — unmatched in Northeast Florida.
Written Estimates Before Any Work
You approve every job in writing. No hidden fees, no bait-and-switch pricing. Ever.
Insured in Florida
Fully HVAC contractor.
Financing Available
Ask about 0% interest promotional periods on new AC system installations.
Cost of a Poor Installation
What a Poor AC Installation Costs You Over Time
The upfront cost of an AC installation is clear. The long-term cost of a poorly done job is hidden. An improperly sized system runs more hours each day than it should, driving higher monthly energy bills for its entire lifespan. If the system isn't installed to manufacturer specifications, it may void parts of the equipment warranty — leaving you responsible for costly repairs when something fails.
In Florida, where a well-maintained system should last 12 to 15 years, the difference between a proper installation and a sloppy one can easily amount to thousands of dollars over the life of the equipment — before considering early replacement costs.
All Set does the job right the first time because a correctly installed system is the only kind worth installing.
Common Questions
Questions Homeowners Ask About AC Installation
How much does AC installation cost in Middleburg and Clay County?
Entry-level 15 SEER2 systems typically cost $4,500–$6,500 installed. Mid-range 16–18 SEER2 units run $6,500–$9,000. Premium variable-speed systems range from $9,000–$12,000+. Ductwork modifications, if needed, add $500–$3,000. All Set provides a clear, itemized quote before any work is authorized.
What is the difference between SEER and SEER2?
SEER2 replaced SEER in January 2023 with more rigorous testing. A 15 SEER2 system is roughly equivalent to a 15–16 SEER under the old standard. The federal minimum for Florida is now 15 SEER2. For Middleburg's climate, 16–18 SEER2 provides a good balance between upfront cost and long-term energy savings.
How do I know what size AC unit I need?
All Set installs and services all major brands including Amana, Carrier, Trane, Lennox, Rheem, Daikin, Goodman, Bryant, American Standard, and Grandaire. We can advise on which system is the best fit for your home's size, ductwork, and budget.
How long does AC installation take?
Most standard residential installations are completed in a single day. The timeline depends on system complexity, whether ductwork modifications are needed, and electrical compatibility. All Set provides a realistic timeline before starting so you can plan accordingly.
What brands does All Set install?
All major residential HVAC brands: Daikin, Carrier, Lennox, Trane, Goodman, Bryant, and American Standard. The recommendation is based on what suits your home and budget, not on what yields the highest margin.
What is the Yeti Club warranty?
All Set's membership program. Homeowners who install a new system and enroll in the middle Yeti Club tier receive a labor warranty matching the manufacturer parts warranty — up to 10 years for both. Significantly longer than the industry standard. View membership details →
Is financing available?
Yes. All Set provides financing options for new AC installations. View financing details → or ask when you schedule your consultation.
Do you handle permits and inspections?
Yes. All Set handles permitting and inspection as part of the installation. A permitted installation protects the homeowner, ensures code compliance, and is required to keep the manufacturer warranty on most equipment.
Ready to Schedule HVAC or Plumbing Service in Middleburg or Clay County?
Call 904-206-8702 to speak with a live dispatcher — same-day appointments available, 24/7, no answering service.
All Set Heating, Air and Plumbing provides AC repair, AC installation, heating service, plumbing, and commercial HVAC maintenance across Middleburg, FL, Clay County, and Northeast Florida.