Sizing, Brands & Cost (2026)
For a standard 1,000 sq ft space, the answer is 24,000 BTU, or a 2-ton mini split. Whether you're sizing a system for an addition, an ADU, a finished basement, or a small house with two bedrooms, that's where most homeowners shopping a ductless air conditioning system land. This guide walks through the sizing math, the brand picks worth shortlisting, what you should actually expect to pay in 2026, and the filter that keeps your new system running clean.
We've been making air filters in the U.S. for over a decade and have shipped to more than two million homes. So when we say 24,000 BTU is the right call for an open 1,000 sq ft space, but a 2- or 3-zone setup is what most homes that size actually need, that's not a guess pulled from a chart. It's what we see in customer service tickets every week.
The best mini split for 1,000 square feet is a 24,000 BTU (2-ton) system. For open layouts like studios, ADUs, or finished basements, a single-zone 24K head will do the job. For 1,000 sq ft homes with bedrooms and hallways, a 2- or 3-zone configuration delivers more even comfort and independent room control.
Sizing at a glance:
BTU target: 20,000–25,000 BTU (rule of thumb: 20–25 BTU per square foot)
Standard size: 24,000 BTU (2 tons)
Single-zone fits: open studios, ADUs, basements, garages, open-plan additions
Multi-zone fits: homes with bedrooms, hallways, or distinct living areas
What to prioritize when choosing:
Zone count first — match heads to rooms before comparing systems.
BTU sizing second — round up to the next standard size if your load lands between tiers.
Brand and tier third — a correctly zoned value-tier system outperforms a poorly zoned premium one.
Filterbuy's take: Our 24K SEER2 17+ mini splits sit in the value tier on purpose — sold direct to homeowners, with a 5-year warranty and a team that will tell you straight if a different zone count fits your home better.
Cost range (2026, installed): $3,000–$10,000, depending on zone count and install complexity.
24,000 BTU is the right size for most 1,000 sq ft spaces. Rule of thumb: 20–25 BTU per square foot. Size up for vaulted ceilings, west-facing glass, or hot climates.
Zone count matters more than brand choice. Single 24K head: open layouts only (studios, ADUs, basements). Bedrooms and hallways: plan for 2 or 3 zones. Wrong zoning is the #1 regret we see in service tickets.
Budget $3,000–$10,000 installed in 2026. Single-zone: $3,000–$5,500. Two-zone: $5,000–$8,000. Three-zone: $6,500–$10,000. Zone count drives cost more than square footage.
Most installs require a licensed contractor. New A2L refrigerants (R-32, R-454B) need active EPA Section 608 certification. The federal Section 25C tax credit ended Dec 31, 2025 — state and utility rebates still active in 2026.
The mesh pre-filter protects the coil, not your air. Rinse every 2–4 weeks.
You need roughly 20,000 to 25,000 BTU to heat or cool 1,000 sq ft, which means a 24,000 BTU (2-ton) mini split is the standard recommendation.
Here's the math behind it. The HVAC industry rule of thumb is 20 to 25 BTU per square foot for cooling. Multiply your square footage by that range:
For a well-insulated home in a mild climate: 1,000 sq ft × 20 BTU = 20,000 BTU
For a hot, sunny, or poorly insulated home: 1,000 sq ft × 25 BTU = 25,000 BTU
Mini splits come in fixed sizes (9K, 12K, 18K, 24K, 30K, 36K BTU), so you round up to the nearest available capacity. For most 1,000 sq ft spaces, that lands you on 24,000 BTU.
Adjustment Factors
• Ceilings above 8 ft: add ~10% per extra foot
• South or west sun exposure: add 10–15%
• Poor insulation or garage conversion: add 20–30%
• Hot, humid climates (Gulf Coast, Phoenix, etc.): add 10–15%
• Excellent insulation, mild climate (PNW, coastal CA): subtract 5–10%
Want a number tailored to your home? A mini split sizing calculator gets you a quick estimate. For a tight load calculation, ask a licensed HVAC contractor to run a Manual J. That's the gold-standard load calc the industry uses.
At 20,000 BTU you'd be a hair under capacity. At 30,000 BTU you'd be oversized, which is worse than it sounds. An oversized mini split short-cycles, meaning it turns on and off too quickly, runs less efficiently, and pulls less humidity out of the air. 24,000 BTU is the right size for most spaces: enough headroom for a hot day, not so much that the system short-cycles in shoulder seasons.
One ton equals 12,000 BTU. Two tons equals 24,000 BTU. So when you see a “2-ton mini split” in a brand spec sheet, that's the same unit.
A few situations call for more capacity than a standard 24K unit can deliver:
Vaulted or cathedral ceilings, where the conditioned volume goes up fast
A detached garage or workshop without insulation in the rolling door, where heat load runs closer to 30 BTU/sq ft
Phoenix, Houston, or anywhere with brutal summer afternoons (plan for the design cooling day, not the average)
1,000 sq ft of west-facing glass, like sunrooms or additions with floor-to-ceiling windows
The mini split sizing chart below covers spaces up to 1,000 sq ft, assuming 8 ft ceilings and average insulation. Use it as a starting point, then apply the adjustment factors above for your specific home.
For a deeper walkthrough of every BTU tier, see our full mini split sizing guide.
| Square Footage | Recommended BTU | Tonnage | Best Use Case |
|---|---|---|---|
| Up to 250 sq ft | 9,000 BTU | 0.75 ton | Small bedroom, home office, nursery |
| 250–450 sq ft | 12,000 BTU | 1 ton | Standard bedroom, office, small studio |
| 450–650 sq ft | 15,000–18,000 BTU | 1.25–1.5 ton | Large bedroom, open studio, finished attic |
| 650–1,000 sq ft | 24,000 BTU | 2 ton | Open 1,000 sq ft space, ADU, basement |
| 1,000–1,500 sq ft | 30,000–36,000 BTU | 2.5–3 ton | Open whole-home, large garage, workshop |
Mini split BTU sizing chart for spaces up to 1,000 sq ft.
A single 24,000 BTU head only works if your 1,000 sq ft is largely open. Most homes that size benefit from a 2- or 3-zone setup so each room can be controlled independently.
Here's why zoning matters. A single ceiling- or wall-mounted head pumps conditioned air in one direction. If you've got hallways, closed bedroom doors, and interior walls, that air can't reach all of it evenly. The most common sizing complaint we see in customer service is from someone who put a single 24K head in the living room of a 1,000 sq ft house and is now wondering why the back bedroom is eight degrees warmer.
A single 24,000 BTU head is a great fit when the space is open:
Studio apartments and lofts
ADUs and tiny homes with an open floor plan
Finished basements with one main room
Insulated garages and workshops
Open-plan additions where the new space connects to a single living area
If you can stand at the indoor unit and see most of the conditioned space, single-zone will do the job.
A 2-zone mini split for 1,000 sq ft is the right call when the home splits into a living/kitchen area plus one bedroom. Sample config: a 12,000 BTU head for the living area plus a 9,000 BTU head for the bedroom, paired with a 21,000 to 24,000 BTU outdoor unit.
Two-zone gives you something single-zone can't: independent thermostats. You can keep the bedroom cool for sleeping while the living area drifts up a few degrees during the day.
For 1,000 sq ft homes with multiple bedrooms or distinct living/dining/sleeping zones, go to 3 or 4 zones. Sample 3-zone config: 12,000 + 9,000 + 9,000 BTU heads on a 30,000 to 36,000 BTU outdoor unit. Sample 4-zone config: 12,000 + 9,000 + 7,000 + 7,000 BTU on a 36,000 to 48,000 BTU outdoor unit.
A few things to know about multi-zone:
The outdoor unit's total capacity often exceeds the sum of the indoor heads. That's normal, since heads rarely all run at full tilt at the same time.
More zones means more refrigerant lines, which means more install labor.
Most 1,000 sq ft homes don't need more than 3 zones.
For a closer look, see our single-zone vs multi-zone setup guide. And if you're thinking about replacing a central system entirely, the U.S. Department of Energy reports that duct losses can account for more than 30% of energy consumption for space conditioning. A properly sized ductless mini split eliminates that loss.
At 24,000 BTU, the brands worth shortlisting fall into three price tiers: premium reliability (Mitsubishi, Daikin), mid-tier value (LG, Fujitsu, Goodman), and budget DIY-friendly (MRCOOL, Senville). Filterbuy fits in the value tier with our own SEER 17+ unit.
Mitsubishi Electric. Cold-climate performance is the calling card. Hyper-Heating INVERTER (H2i) models hold 100% capacity at 5°F and continue operating down to -13°F at 90% capacity. Up to 22+ SEER2 across the M-Series line. Warranty is 5 years parts/7 years compressor standard, extending to 10 years with licensed-contractor install and registration, or 12 years with a Diamond Contractor install and 90-day registration.
Daikin. A close peer to Mitsubishi at a slightly lower price. SEER2 ratings reach 22.5 across the line, with typical 24K Single-zone units at 19.5 to 20 SEER2 and multi-zone outdoor units at 21 SEER2. 12-year limited warranty available on select models with registration. Best for hot-climate homes where you want premium cooling without the Mitsubishi premium.
LG. Solid build, with good app and Wi-Fi controls. 24K SKUs run from 17 SEER2 (concealed-duct) to 23 SEER2 (Art Cool Premier), with multi-zone outdoor units at 22.5 SEER2. 10-year warranty requires installation by a licensed contractor and registration within 60 days. LG RED models offer 100% heating capacity down to 5°F.
Fujitsu. Quiet operation is the headline. Up to 22 SEER2 across the AIRSTAGE line, with strong service network coverage. Standard warranty is 5 years parts / 7 years compressor, extending to 10 years with licensed-contractor install and registration, or 12 years with Elite Contractor install. Best for bedroom-heavy installs where noise matters.
Goodman. Reliable and widely serviceable, with pricing that beats the Japanese brands. Best for homeowners working with a local HVAC contractor who carries the line.
MRCOOL DIY. The standout DIY option, thanks to pre-charged refrigerant lines. The 5th Gen 24K BTU model hits 22.7 SEER2 with operation down to -13°F. Standard 7-year compressor / 5-year parts warranty, with a limited lifetime compressor warranty available on registration. Best for handy homeowners installing in a non-permitted accessory space, but always check local code first.
Senville. Imported brand at a lower price point, with a limited service network. Best for budget-driven installs where you have a contractor familiar with the brand.
Filterbuy carries mini splits in the value tier, with SEER2 ratings that hold up against any mid-tier system, sold direct to homeowners with no middleman markup. If you need a 24K single-zone or a multi-zone setup, our team can match you to the closest SKU and the right indoor head configuration. If we don't have your exact size in stock for a specific zoning combination, we'll tell you. That's part of the deal.
| Brand | Top SEER2 | Warranty | Cold-Climate Rated | Price Band | DIY-Friendly | Tier |
|---|---|---|---|---|---|---|
| Mitsubishi | 22+ | Up to 12 yr | Yes (Hyper-Heat) | $$$$ | No | Premium |
| Daikin | Up to 22.5 | Up to 12 yr | Yes | $$$$ | No | Premium |
| LG | Up to 23 | 10 yr | Some models (RED) | $$$ | No | Mid |
| Fujitsu | Up to 22 | Up to 12 yr | Some models | $$$ | No | Mid |
| Goodman | Up to 19 | 10 yr | Limited | $$ | No | Mid |
| MRCOOL DIY | Up to 22.7 | 7 yr / lifetime* | Yes (Hyper Heat) | $ | Yes | Budget |
| Senville | Up to 23 | 5–7 yr | Some models | $ | Sometimes | Budget |
| Filterbuy | 17+ | 5 yr | — | $$ | No | Value |
SEER2 ranges represent top-of-line specs across each brand's 24K-class lineup, current to 2026. Specific SKU specs vary; verify the AHRI certificate for your matched system.
For the full 2026 brand breakdown across every size, see our best mini split brands of 2026 guide. You can also cross-check any model against the ENERGY STAR Certified Ductless Heat Pump Product Finder before you buy.
How Much Does a 1,000 Sq Ft Mini Split Cost Installed?
A 1,000 sq ft mini split system runs $3,000 to $10,000 installed in 2026, depending on zone count, brand, SEER2 rating, and local labor rates.
The biggest cost driver is zone count, not square footage. A single-head 24K unit in a simple install sits at the floor of the range. A 4-zone premium-brand setup is the ceiling. Here's what we see across actual jobs:
Equipment vs. labor breakdown: labor typically runs 30 to 50% of total project cost (per Filterbuy installation data), so equipment lands at 50 to 70%. Labor itself ranges from $1,000 to $3,500 depending on the line-set route, electrical work, and whether the contractor needs to add a dedicated 230V circuit.
A few other cost factors worth knowing:
Long line-set runs (over 25 ft per head) add material and labor
Concrete pads or wall brackets for the outdoor unit: $200 to $800
Permits and inspection: $100 to $500, depending on your jurisdiction
Removal of a window AC or old system: $100 to $300
Electrical panel upgrades for older homes: $500 to $2,000+ (sub-panel) or $4,800+ (full panel replacement)
The Section 25C Energy Efficient Home Improvement Credit covered 30% of project costs, capped at $2,000, for qualifying ENERGY STAR-certified mini split heat pumps installed by December 31, 2025. The original Inflation Reduction Act extended this credit through 2032, but Public Law 119-21 (passed in 2025) shortened the eligibility window. If your install was completed by Dec 31, 2025, you can still claim the credit on your 2025 tax return using IRS Form 5695. For installs in 2026 and later, the federal 25C credit is no longer available.
State and utility rebates remain active in many regions. The HEEHRA point-of-sale rebate program offers up to $8,000 toward qualifying heat pumps for income-eligible households (state-dependent rollout). Verify current eligibility at energystar.gov, your state energy office, and with a tax professional before you file.
For the lowest-priced options at this size, see our breakdown of the cheapest mini split systems for the size. For a deeper cost breakdown including installation labor across regions, our mini split installation cost breakdown has the numbers.
A note on accuracy: these ranges come from completed jobs and current 2026 pricing. For your specific home, get a Manual J load calculation and a written quote from a licensed HVAC contractor.
Most 24,000 BTU multi-zone installs need a licensed HVAC contractor. The reason is refrigerant rules, not the work itself. As of January 1, 2025, the EPA banned manufacturing residential AC equipment using R-410A under the AIM Act. New systems use A2L refrigerants like R-32 and R-454B, which require EPA Section 608 certification to handle legally.
Confirm electrical capacity. A 24K unit usually requires a dedicated 230V circuit. If your panel is full, factor in a sub-panel ($1,800 to $3,000) or full panel upgrade (starting around $4,800).
Plan indoor head locations. Wall-mount heads need 6 ft of mounting clearance and good airflow into the room.
Map your line-set route. Shorter is better. Aim for under 25 ft per head when possible.
Pull permits. Most jurisdictions require an HVAC permit and a final inspection.
Get the AHRI certificate. This proves the indoor and outdoor units are a matched system, which is required for ENERGY STAR rebates and any state-level tax credits.
Ask for the Manual J output. Any contractor worth hiring will run a load calc. Ask for a copy.
Your 24,000 BTU mini split has a built-in mesh pre-filter that catches large particles. It was never built to replace your home's whole-house HVAC filter. The two work together.
The mesh pre-filter inside each indoor head is washable and lasts the life of the unit. Pop it out every 2 to 4 weeks, rinse it under the sink, let it dry, and slide it back in. It catches pet hair, lint, and large dust, the stuff that would otherwise gunk up the coil.
What it doesn't catch are the small particles that actually affect indoor air quality: pollen, mold spores, smoke, fine dust, dander. For those, you need a MERV-rated filter. The EPA recommends MERV 13 (or as high as your system can accommodate) for most homes, especially those dealing with allergies, pets, or wildfire smoke.
If the mini split is your only system (no central HVAC ducts), an in-room air purifier with a HEPA filter is the right complement. If you still have central ducts in another part of the house, keep that system on a regular MERV 11 to 13 filter schedule.
600+ standard sizes, plus custom-cut for any system
Made in the USA
Free, fast shipping, factory-direct
Auto-deliver: set it and forget it. The right filter shows up when you need it.
Real human support, not a chatbot
For more on how mini splits affect indoor air quality, see our how mini splits affect indoor air quality guide.
The case for ductless mini splits at this size rests on three numbers worth knowing. Each is sourced to a federal agency, not an aggregator.
From the U.S. Department of Energy: “Duct losses can account for more than 30% of energy consumption for space conditioning, especially if ducts are in an unconditioned space like an attic.” Eliminating ductwork is the single biggest efficiency advantage a mini split has over a forced-air system.
Source: U.S. Department of Energy — Ductless Minisplit Heat Pumps
Also from the U.S. Department of Energy: “Ducted heat pumps typically achieve efficiency ratings between 15.2 to 25 SEER2, while ductless minisplits can achieve ratings between 15.2 and 35 SEER2.” The federal minimum SEER2 is 14.3 for split heat pumps. A 24K mini split running at SEER2 22 uses roughly 35% less electricity than a SEER2 14 baseline.
Source: U.S. Department of Energy — Ductless Minisplit Heat Pumps
From the U.S. Environmental Protection Agency: “If you decide to upgrade to a higher efficiency filter, choose a filter with at least a MERV 13 rating, or as high a rating as your system fan and filter slot can accommodate.” MERV 13 is the threshold where an HVAC filter starts catching the small particles (pollen, mold spores, smoke, virus-carrying droplets) that the mini split's mesh pre-filter doesn't.
Source: U.S. Environmental Protection Agency — What is a MERV rating?
These are the seven references we send to homeowners who ask us where to start their own research. All are .gov, .org, or industry-authority sources, current to 2026.
1. U.S. Department of Energy — Ductless Mini-Split Heat Pumps. The clearest plain-language overview of how ductless systems work, what efficiency ratings to look for, and where they make the most sense. Start here if you're new to the category.
https://www.energy.gov/energysaver/ductless-minisplit-heat-pumps
2. ENERGY STAR — Certified Ductless Heat Pump Product Finder. Independently verified efficiency data for every certified mini split on the U.S. market. Filter by brand, BTU, and SEER2 to confirm any unit you're considering meets ENERGY STAR criteria.
https://www.energystar.gov/productfinder/product/certified-mini-split-heat-pumps
3. U.S. EPA — What is a MERV Rating? The official EPA explainer on filter efficiency ratings, with the agency's specific recommendation to use MERV 13 (or as high as your system can support) for residential air filtration.
https://www.epa.gov/indoor-air-quality-iaq/what-merv-rating
4. U.S. EPA — Section 608 Technician Certification. The federal regulation governing refrigerant handling. Any contractor working on your mini split must hold an active Section 608 certification, especially for current A2L refrigerants like R-32 and R-454B.
https://www.epa.gov/section608
5. ENERGY STAR — Air Source Heat Pump Tax Credits. The official guide to the federal Section 25C tax credit. Covers eligibility requirements, current program status, and how to file IRS Form 5695. (Note: 25C eligibility ended Dec 31, 2025; this page is the authoritative reference for installs completed before that date and for any future program updates.)
https://www.energystar.gov/about/federal-tax-credits/air-source-heat-pumps
6. ACCA — Manual J Residential Load Calculation. The Air Conditioning Contractors of America's standard for sizing residential HVAC equipment. If a contractor doesn't run a Manual J, you're getting a guess. This page explains what to ask for.
https://www.acca.org/standards/approved-standards/manual-j
7. AHRI Directory of Certified Product Performance. Search any matched mini split system to confirm the AHRI certificate, which verifies that the indoor and outdoor units have been tested as a pair. Required for ENERGY STAR qualification and most rebate programs.
https://www.ahridirectory.org/
Bottom line: 24,000 BTU is the easy answer. How many zones is the harder question — and the one that decides whether you're comfortable a year from now.
After a decade of customer calls and installation tickets, the pattern is clear. Homeowners who write in frustrated almost never have the wrong BTU. They have:
The right BTU split across the wrong number of heads
A single 24K head pushing cold air into the living room while the back bedroom sits 8°F warmer
Hallways, closed doors, and interior walls the air physically can't reach
Air doesn't turn corners on command. That's the entire zoning conversation in one sentence.
Zone count first. Match heads to rooms before you compare anything else.
BTU sizing second. Once zoning is right, hitting the BTU target is straightforward.
Brand and tier third. A correctly zoned value-tier system beats a poorly zoned premium one — every time, for thousands less.
We built our mini split line around the same principle that has guided our filter business for over a decade: deliver real reliability without the premium-tier markup. Here's what that means at the 24K size:
SEER2 17+ efficiency that holds up against the mid-tier competition, year after year
Sold direct to homeowners — no middleman, no dealer markup, no upsell pressure
5-year warranty backed by a team you can actually reach
Right-sized recommendations, not biggest-ticket recommendations — if a 2-zone configuration fits your home better than a 3-zone, we'll tell you
Real human support when you call, not a chatbot loop
Reliability isn't just a spec sheet number. It's whether the system still runs the way it should five summers from now, and whether someone picks up the phone when it doesn't.
That's the standard we hold ourselves to — because for over a decade, helping homeowners breathe easier has been our whole job.
You've got the math, the cost, and the zoning logic. Here's the order to take action.
Walk your 1,000 sq ft. Answer three questions:
Layout: open or divided?
Ceiling height, and any vaulted sections?
Which walls face south or west?
Open → single-zone is on the table. Divided → plan for 2 or 3 zones.
Use a mini split sizing calculator for a quick estimate.
For a tight answer, ask a contractor to run a Manual J load calc.
Apply the adjustment factors from the sizing chart above.
Land between 20,000–25,000 BTU? You're in 24K territory.
1 zone → studios, ADUs, basements, garages
2 zones → living/kitchen + one bedroom
3 zones → multiple bedrooms or distinct living areas
4 zones → only when 3 can't reach a separated space
Single-zone 24K: $3,000–$5,500
2-zone: $5,000–$8,000
3-zone: $6,500–$10,000
4-zone: $8,000–$12,000
Add buffers: pad or bracket ($200–$800), permits ($100–$500), and electrical work as needed.
HEEHRA rebates — up to $8,000 for income-eligible households
State energy office programs — search by your state
Local utility rebates — often $300–$1,500 for ENERGY STAR units
Verify at energystar.gov before you sign.
Every quote must include:
Make, model, and AHRI certificate number
Manual J output
Itemized labor, materials, permits, and electrical
Refrigerant type (R-32 or R-454B)
Active EPA Section 608 certification
Warranty in writing
No Manual J? No itemization? Move on.
Confirm a dedicated 230V circuit (or budget a sub-panel)
Map line-set routes — aim for under 25 ft per head
Pull permits through your jurisdiction
Schedule final inspection for install week
Every 2–4 weeks: rinse the mesh pre-filter under the sink.
Annually: book a pro check on refrigerant, coil, and connections.
Maintained: 15–20 years of efficient runtime. Skipped: efficiency drops by year three.
A 24,000 BTU (2-ton) mini split is the standard size for a 1,000 sq ft house. The HVAC rule of thumb is 20 to 25 BTU per square foot, which puts you between 20,000 and 25,000 BTU. 24,000 is the next available unit size up.
A 2-ton mini split is 24,000 BTU. One ton equals 12,000 BTU of cooling capacity, so 2 tons works out to exactly 24,000 BTU. This is the standard size for spaces between roughly 650 and 1,000 sq ft with average insulation and 8-ft ceilings.
Only if the space is largely open. A single 24K head works well for studios, ADUs, and open-plan additions. For 1,000 sq ft homes with bedrooms and interior walls, a 2- or 3-zone setup will cool more evenly and let you set different temperatures by room.
Most 1,000 sq ft homes are best served by 2 or 3 zones. Open-plan spaces can get away with a single zone. Homes with multiple bedrooms or separate living/dining areas typically need 3 zones for even comfort and independent room control.
Yes, if it's a cold-climate-rated heat pump. Mitsubishi Hyper-Heat models hold 100% capacity at 5°F and continue running at 90% capacity down to -13°F. LG RED, Daikin Aurora, and MRCOOL Hyper Heat lines offer comparable cold-climate ratings. In zones where winter regularly drops below freezing, look for high HSPF2 ratings and pair the system with a backup heat source for extreme cold snaps.
A 1,000 sq ft mini split costs $3,000 to $10,000 installed in 2026. A single-zone 24,000 BTU system runs $3,000 to $5,500. A 2-zone setup runs $5,000 to $8,000. A 3-zone setup runs $6,500 to $10,000. Premium brands and complex installs push higher.
A budget-tier single-zone 24,000 BTU unit (MRCOOL, Senville, or comparable) installed by a local contractor lands around $3,000 to $4,500. See our cheapest mini split systems guide for current options. DIY-friendly models reduce labor cost but still require Section 608 certification for any refrigerant work.
Clean the built-in mesh pre-filter every 2 to 4 weeks. Just rinse it under the sink and let it dry. It's washable for the life of the unit. If you also have central HVAC ducts in your home, replace that filter every 1 to 3 months with a MERV 11 to 13 rating.
Only for installs completed by December 31, 2025. The Section 25C credit covered 30% of project cost up to $2,000 for qualifying ENERGY STAR-certified heat pumps, but eligibility ended Dec 31, 2025 under Public Law 119-21. If your install was completed by that date, you can still claim it on your 2025 tax return. State and utility rebates may still be available for 2026 installs.
Most 24,000 BTU multi-zone systems require a licensed HVAC contractor because A2L refrigerants now require EPA Section 608 certification. Some pre-charged DIY models (like the MRCOOL DIY line) are designed for homeowner installation, but local code and permit rules still apply.
You've got the sizing, the zoning logic, and the 2026 cost ranges — now it's time to match a system to your home. Shop Filterbuy's 24K mini splits direct, or talk to our team to lock in the right zone configuration before you buy.
About the Author
The Filterbuy Team manufactures and sells residential air filters and ductless mini split systems direct to homeowners. With over a decade of U.S.-based manufacturing and more than two million homes served, we help homeowners protect their families, their homes, and their HVAC systems. Better air for all.
