Florida Keys Mini Split Rebate: The FKEC Energy Audit, SEER Minimums, and Salt Air Specs


Adding a ductless mini-split in the Florida Keys means a cooperative rebate with an efficiency bar well above the federal minimum, plus an outdoor unit that must survive salt spray and storm surge.

On October 26, 2026, we checked Florida Keys Electric Cooperative's (FKEC) live program page against the listings that still rank, and several are out of date.

TL;DR

FKEC pays a bill credit of 30%, up to $400, on a ductless mini-split rated 20 SEER2 or higher. Call FKEC at (305) 852-2431 before you buy, then file within 60 days of purchase with a paid receipt. Spec the outdoor unit for salt air and flood height too.

Top Takeaways

  • FKEC's ductless rebate pays 30% up to $400 as a bill credit, within a $500 yearly cap.

  • FKEC's ductless floor is 20 SEER2, not the 18 SEER older listings repeat.

  • Florida's legal minimum is 14.3 SEER2, so many value units miss the FKEC line.

  • FKEC's central AC rebate pays more ($500) at a lower bar (15.3 SEER2), which often suits whole-home replacements better.

  • Outdoor units belong 1 foot above base flood elevation on corrosion-resistant anchors.

Who Qualifies for the FKEC Mini Split Rebate in 2026?

FKEC's rebate covers residential members improving an existing primary residence in FKEC territory, renters included. New construction does not qualify.

FKEC serves the Upper and Middle Keys, including Key Largo and Marathon. Key West and the Lower Keys get power from Keys Energy Services, so the name on your bill decides which program applies.

Every FKEC rebate draws from the same $500 limit per member per calendar year, paid first come, first served. A $400 mini split credit plus a $350 EV charger rebate in the same year would leave $250 unpaid. Our tip: install the mini split late in one year and an attic insulation upgrade early in the next, so each claim gets its own limit.

Rooms the ductwork never reached are prime candidates, as Filterbuy's guide to why one room is colder than the rest of the house explains. A converted garage fits FKEC's existing-home rule, while a new room addition may count as new construction, so ask first. For a 500 sq ft space, expect roughly 9,000 to 12,000 BTU, per this mini-split sizing guide for a 500 sq ft house.

Does FKEC Still Require a Home Energy Audit Before the Rebate?

No. FKEC's current rebate page no longer lists a home energy audit as a prerequisite. Its sequence is: call to check availability, install, submit within 60 days, and FKEC tells you if it needs an on-site verification.

Many listings have not caught up. Those drawn from the DSIRE incentive database still describe the old audit-first rule, and another we checked reports no FKEC heat pump rebate at all.

In our view, the phone call is the new audit. Before you sign a contract, ask FKEC:

  • Is ductless mini-split rebate funding open right now?

  • Is 20 SEER2 still the floor on the current ductless rebate form?

What SEER Rating Does a Mini Split Need for the FKEC Rebate?

FKEC's rebate page lists 20 SEER2 or higher for a ductless mini split. Check the SEER2 on the AHRI certificate for the exact indoor and outdoor pair you are buying, not a brochure's "up to" figure.

Older listings cite 18 SEER, from the pre-2023 rating method. The U.S. Department of Energy notes SEER and SEER2 are not directly comparable, so an 18 SEER unit can land below 20 SEER2. Multi-zone ratings also shift with the mix of indoor heads, so settle on wall, ceiling, or floor heads for each room before asking for the certificate.

That bar sits far above the 14.3 SEER2 federal minimum. Filterbuy, a family-owned American air filter manufacturer that also sells single-zone ductless mini-split systems, shows the gap. Its unit carries a 7-year compressor and 3-year parts warranty and is rated at 17 SEER2, which meets the federal minimum but not FKEC's floor.

Our math: any install above about $1,333 earns the full $400, and moving from 17 to 20 SEER2 trims cooling energy by roughly 15%. If the 20 SEER2 quote runs $1,000 higher, the credit covers $400 and that 15% has to earn back the other $600.

For whole-home replacements, FKEC's central AC rebate pays more: 30% up to $500, at just 15.3 SEER2. The ductless rebate fits best when the mini-split serves a room the ducts never reached.

Which Salt Air Specs Protect a Mini Split in the Keys?

Prioritize a factory-applied coil coating and corrosion-resistant hardware, and get the manufacturer's coastal warranty terms in writing before you compare SEER2 numbers. Salt air attacks the outdoor coil and fasteners first.

  • Coil protection: Factory-applied coatings generally outlast a spray added in the field.

  • Hardware: Use stainless steel or hot-dip galvanized anchors and straps.

  • Warranty terms: Some manufacturers limit corrosion coverage near saltwater. FKEC's program ends when the credit posts, so this clause is your only long-term protection.

  • Placement: Mount the unit on the landward side, out of direct spray.

  • Upkeep: Rinse the coil with low-pressure fresh water as the manual allows, and book an annual HVAC tune-up.

How Should the Outdoor Unit Be Mounted for Storms and Flooding?

Mount the outdoor unit at least 1 foot above base flood elevation, per DOE Building America guidance, anchored to its pad or bracket, with the platform anchored to the structure.

Your elevation certificate, often on file for flood insurance, lists the number your installer needs. For wall brackets, confirm the rated load covers the unit and that anchorage passes permit review with Monroe County's building department or your municipality.

What About the Central System You Keep?

Keep maintaining the ducted system. Many Keys homes keep their ducted system after adding a mini-split, so check its filter monthly and replace it on your manual's schedule.

Start with the size printed on the old filter's frame. While checking the retail links here, we found one listing whose spec table contradicted its own title, so trust the frame.

A filter's nominal size runs slightly larger than its actual size, so a 20x24x2 measures about 19.5 x 23.5 x 1.75 inches. Filterbuy lists actual dimensions, such as 15.5 x 19.5 x 0.75 inches for a 16x20x1. Common Filterbuy sizes include a 16x20x1 two-pack at Target, a 16x18x1 two-pack at Walmart, a 20x20x4 filter on Amazon, and a 20x25x4 two-pack at Home Depot. Size guides cover odd fits like a 16.25x21x4 MERV 8 filter or a 17x20x1 MERV 8 filter.

Use the MERV rating your manual allows, and read up on how HEPA and MERV ratings differ before assuming a higher number fits. When the local air quality index climbs during dusty or smoky spells, check the filter sooner. Considering UV lights for the air handler? Have the installer confirm compatibility.

Can You Stack the FKEC Rebate with Other Incentives in 2026?

Very little stacks with the FKEC rebate in 2026. The federal Energy Efficient Home Improvement Credit, Section 25C, ended for equipment placed in service after December 31, 2025, and Florida has no state credit to replace it. Neighboring states differ. Georgia pairs state HEAR rebates with utility programs, as Filterbuy's guide to adding a mini split in Georgia shows.

"We sell a 17 SEER2 single-zone mini split ourselves, and we tell Keys buyers plainly that it will not earn the FKEC credit, so the honest comparison is our price and warranty against a 20 SEER2 system's price minus $400. Whichever way that math lands, pull the AHRI certificate and price the coil coating first, because an outdoor coil lost to salt air costs far more than the credit."

The Filterbuy Team

Essential Resources

Florida Mini Split Costs and Statewide Rebates

Filterbuy's guide to adding a mini split AC system in Florida, including rebates, puts 2026 installed costs at about $1,500 to $14,500, depending on zones and BTU size. Its breakdown of Florida mini-split installation costs gives a statewide benchmark for Keys quotes.

Elevating and Anchoring Outdoor Units

PNNL's Building America guide to elevating and securing outdoor HVAC equipment covers platform height and corrosion-resistant straps.

Wind Anchorage for Outdoor Units

The Florida Building Commission’s notice on wind resistance for mechanical equipment says the fasteners tying an outdoor unit to its stand, and the stand to the structure, must meet code wind loads. It calls for stainless steel fasteners within 3,000 feet of the ocean, which covers most Keys homes. 

Certified Efficiency Ratings

AHRI's overview of its Directory of Certified Product Performance explains how to look up a matched system's SEER2.

Supporting Statistics

Air Conditioning Takes 28% of Florida Home Energy

Air conditioning accounted for 28% of total site energy in Florida households in 2020, compared with 9% across all U.S. homes, according to EIA's 2020 household end-use release.

Key West Has Never Dropped Below 41 Degrees

The coldest temperature on record in Key West is 41°F, set in 1886 and matched in 1981, per a National Weather Service Key West climate summary, which leaves cooling as the main operating cost.

Florida's Legal Floor Is 14.3 SEER2

Split systems under 45,000 Btu per hour installed in Florida must meet 14.3 SEER2, according to DOE's 2023 central air conditioner standards FAQ. FKEC's floor sits nearly six points higher.

Final Thoughts

Our take: the $400 credit is the smallest number in the decision. Coil coating and anchoring decide whether the system survives salt air, so never cut them to chase a credit.

Next Steps

Compare what mini split installation costs near you and how to vet a local mini split installer before calls go out.

Before You Request Quotes

  1. Confirm FKEC is the utility named on your electric bill.

  2. Call FKEC at (305) 852-2431 to confirm ductless funding and ask whether a home visit applies.

  3. Pull your elevation certificate and note the base flood elevation.

What Every Quote Should List

  • The AHRI certificate number showing 20 SEER2 or higher

  • The factory coil coating on the outdoor unit

  • Stainless steel or hot-dip galvanized brackets and anchors

After the Install

  1. Keep the permit record and the contractor's paid receipt.

  2. File the FKEC request form within 60 days of purchase, not install.

  3. Watch for the credit on your next electric bill.

  4. If a ducted system stays, set up Filterbuy filter auto-delivery so changes never slip.

Frequently Asked Questions

Does the 60-Day FKEC Deadline Start at Purchase or Install?

FKEC counts from purchase. If you buy equipment early and the install slips, the window can close first, so buy close to the install date.

Is There a Mini Split Rebate in Key West?

Keys Energy Services serves Key West, and its program has included a ductless air conditioner rebate. Check its current list first.

Does a Vacation Home in the Keys Qualify for the FKEC Rebate?

No. FKEC pays only on a member's primary residence in its territory, even when the member owns several Keys homes.

Do I Need a Permit to Add a Mini Split in the Florida Keys?

In most cases, yes. A licensed contractor pulls the permit; it's one of the AC installation basics worth knowing before work starts.

Get Your Florida Keys Mini Split Rebate Right the First Time

The FKEC energy audit is now a pre-purchase call, while the 20 SEER2 floor and salt air specs steer the model and installation. Call FKEC today, then hand your installer the checklist above so your mini-split earns the credit and lasts.

Glossary

  • SEER2: The federal cooling efficiency rating used since 2023. Higher means less electricity per unit of cooling.

  • AHRI Certificate: An AHRI document listing the certified ratings of a matched indoor and outdoor system.

  • Base Flood Elevation (BFE): The flood height with a 1% annual chance, shown on a property's elevation certificate.

  • Florida Keys Electric Cooperative (FKEC): A member-owned electric cooperative serving the Upper and Middle Keys.

  • Keys Energy Services: The public power utility serving Key West and the Lower Keys.






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