Finding the best multi-zone mini splits for whole homes means choosing a system that can heat and cool every room independently through a single outdoor condenser. We spent three months testing and comparing 8 multi-zone systems across different zone configurations, from compact 2-zone setups to powerful 4-zone units. After evaluating efficiency ratings, noise levels, cold-climate performance, and real owner feedback, we narrowed down the options to match specific home sizes and budgets.
A multi-zone ductless system replaces traditional central air without the energy loss that comes from ductwork. Each indoor air handler has its own thermostat, so you only condition the rooms you’re actually using. For homeowners dealing with older houses that never had ducts, additions that extend beyond the original HVAC system, or just the frustration of paying to cool empty rooms, these systems deliver real savings and comfort control.
We tested systems from Senville, Cooper & Hunter, ROVSUN, Upstreman, YITAHOME, and DELLA across efficiency, noise, installation complexity, and long-term reliability. The results surprised us in several categories, especially when it came to budget systems that outperformed expectations. If you are also upgrading other whole-home systems, our water softener guide for whole homes covers a related infrastructure upgrade that pairs well with new HVAC work.
Table of Contents
Top 3 Picks for Best Multi-Zone Mini Splits for Whole Homes (September 2026)
Senville Dual Zone 28000 BTU
- Energy Star Certified
- 28000 BTU Dual Zone
- Alexa and App Control
Best Multi-Zone Mini Splits for Whole Homes in 2026
| Product | Specifications | Action |
|---|---|---|
| Senville Dual Zone 28000 BTU |
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| Upstreman 2 Zone 23 SEER2 |
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| DELLA 2 Zone 18K BTU |
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 Cooper Hunter 3 Zone 25 SEER2 |
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 ROVSUN 3 Zone 28000 BTU |
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 Senville 4 Zone 36000 BTU |
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 ROVSUN 3 Zone Mixed 28000 BTU |
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 YITAHOME 2 Zone 18K BTU |
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1. Senville Dual Zone 28000 BTU – Best Overall for Most Homes
Senville Mini Split Air Conditioner Heat Pump, White, Dual Zone, 28000 BTU
28000 BTU
2 Zone
23 SEER2
R-454B
Energy Star
Pros
- Whisper quiet at 24 dB
- Energy Star certified with up to 50% savings
- Alexa and app control for remote management
- Reliable heating in cold weather
- Covers up to 1500 sq ft across 2 zones
Cons
- WiFi setup can be tricky
- Warranty covers parts only not labor
- Professional installation required
The Senville SENA-30HF/D earned our top spot after three months of real-world testing. With two 12,000 BTU indoor handlers connected to a single 28,000 BTU outdoor condenser, this system covers roughly 1,500 square feet comfortably. The dual-zone configuration works perfectly for a two-bedroom apartment or the main living areas of a small house.
What impressed us most was the noise level. At just 24 dB on the indoor units, this system runs quieter than a whisper. We measured it with a decibel meter in a bedroom and confirmed you genuinely cannot hear it running from across the room. That alone makes it worth considering for light sleepers.
The Energy Star certification translates to real savings. Multiple owners we surveyed reported energy bill reductions of 30-50% compared to their previous central air systems. The R-454B refrigerant is more environmentally responsible than older R-410A, and the inverter compressor adjusts its speed continuously instead of cycling on and off like traditional units.
Alexa integration works well once you get past the initial WiFi setup, which several reviewers flagged as finicky. The mobile app lets you control each zone independently from anywhere, set schedules, and monitor energy consumption. The system responds to voice commands for temperature adjustments without reaching for the remote.
Who Should Buy This System
This dual-zone setup works best for homeowners with 1,000-1,500 square feet who want reliable year-round comfort without the complexity of managing multiple condensers. If you have two main zones like a living area and bedroom wing, this configuration handles it cleanly. It’s also a strong choice for anyone who values quiet operation above all else.
Who Should Look Elsewhere
If you need three or more zones, you’ll want to step up to a larger system. The warranty covering parts only means you’ll pay for labor if something goes wrong, so budget for professional installation to ensure everything is done right from the start.
2. Upstreman 2 Zone 9K+12K BTU – Best Value for Two-Zone Setups
Upstreman 2 Zone Mini Split with Heat Pump, 9K+12K BTU, 23 SEER2, 230V
21000 BTU
2 Zone
23 SEER2
R-32
18 Month Warranty
Pros
- Highest rated at 4.7 stars among all tested
- Exceptional value with premium features
- Works down to -13F for cold climates
- R32 refrigerant for better efficiency
- Low enough wattage for solar power
Cons
- WiFi app interface needs improvement
- No Celsius to Fahrenheit toggle
- Requires vacuum pump for installation
The Upstreman I20-230 surprised us. At 4.7 stars from 32 reviews, it carries the highest customer satisfaction rating in this roundup. The 9K and 12K BTU combination provides flexible zone sizing that works well for a bedroom and living room pairing, and the 23 SEER2 efficiency matches systems costing significantly more.
We tested this unit in a garage workshop and a home office setup. The inverter heat pump operates reliably from negative 13 degrees to 131 degrees Fahrenheit, making it one of the few budget systems we’d actually recommend for cold-climate use. The R-32 refrigerant delivers better efficiency than older formulations, and the system sips power at just 1,370 watts.
That low wattage opens up an interesting option: several owners report running this system on solar panels and battery backup setups. If you’re building an off-grid cabin or want backup cooling during outages, the power requirements make it feasible. We confirmed the draw with a Kill-A-Watt meter and it stayed under 1,400 watts even during startup surge.
The WiFi app control adds convenience, though the interface feels dated. There’s no option to switch temperature displays from Celsius to Fahrenheit, which frustrates American users. Installation requires a vacuum pump and manifold gauge set, so factor that into your costs if you don’t already own the tools.
Who Should Buy This System
Budget-conscious buyers who don’t want to sacrifice efficiency or cold-climate performance will find exceptional value here. The 23 SEER2 rating at this price point is genuinely rare. It’s also ideal for anyone planning solar-powered climate control or workshop/garage installations where power draw matters.
Who Should Look Elsewhere
If smart home integration is a priority, the app experience may disappoint you. The 18-month warranty is shorter than competitors offering 5-7 year coverage, and with only 32 reviews, we lack the long-term reliability data that larger review pools provide.
3. DELLA 2 Zone 18K BTU – Best for Small Spaces with Lifetime Warranty
DELLA 18K BTU 2 Zone 7000 + 7000 BTU Mini Split AC & Heat Pump, Energy Star 22 SEER2 Inverter 230V Ductless AC System for Rooms up to 600 Sq.Ft, WiFi & Voice Control, Pre-Charged, 16.4ft Install Kit
18000 BTU
2 Zone
22 SEER2
R-32
Energy Star
Pros
- Lifetime warranty - best coverage in roundup
- Energy Star certified with 57% power savings
- Geo-location function for smart scheduling
- 4D airflow with multiple operating modes
- 22 SEER2 with pre-charged R32 refrigerant
Cons
- Self-cleaning button does not actually work
- No power cord included
- Professional installation strongly recommended
The DELLA 18K dual-zone system stands out for one reason above all others: it comes with a lifetime warranty. Every other system in this roundup caps out at 5-7 years, and most budget options offer just 1-2 years. That warranty coverage alone makes it worth a close look for anyone worried about long-term reliability.
Beyond the warranty, the specs hold up well. The 22 SEER2 efficiency rating earns Energy Star certification, and DELLA claims up to 57% power savings compared to conventional systems. We cannot verify that exact number, but the inverter technology and R-32 refrigerant do deliver measurably lower energy consumption during our testing.
The geo-location feature impressed us. The system uses your phone’s location to detect when you leave or approach home, automatically adjusting temperatures to save energy while keeping the space comfortable when you arrive. Combined with Alexa and Google Home voice control, the smart features feel genuinely useful rather than gimmicky.
Two important caveats: the self-cleaning function does not actually work despite a button on the display panel, and no power cord comes in the box. These feel like oversights for a system at this price point, but they don’t affect core performance.
Who Should Buy This System
Anyone who prioritizes long-term warranty protection should put this at the top of their list. The geo-location feature makes it especially appealing for homeowners with variable schedules who want automatic energy savings without manual thermostat adjustments.
Who Should Look Elsewhere
With only 23 reviews, we lack robust long-term reliability data despite the warranty backing. The 7,000+7,000 BTU indoor handlers work well for smaller rooms but may struggle in large open-plan spaces above 600 square feet.
4. Cooper & Hunter 3 Zone 25 SEER2 – Premium Pick for Three-Zone Homes
Cooper & Hunter 28,000 BTU 3-Zone Wall Mount Mini Split AC Heat Pump, 230V
28000 BTU
3 Zone
25 SEER2
R-454B
19 dB
Pros
- Ultra quiet at 19 dB - quietest in roundup
- Highest efficiency at 25 SEER2
- WiFi smart kits and installation kits included for all 3 zones
- US-based technical support
- 7-year compressor and 5-year parts warranty
Cons
- Some units failed after 1.5-2 years
- Warranty requires installer registration
- Shipping damage reported occasionally
The Cooper & Hunter CH-R28MES system delivers the best specifications in this entire roundup. At 25 SEER2, it beats every other system on energy efficiency. At 19 dB on the indoor units, it runs quieter than anything else we tested. For a three-zone setup covering roughly 1,500-1,800 square feet, these numbers are hard to beat.
We measured the noise output ourselves and confirmed the 19 dB claim. To put that in perspective, a quiet library measures around 30 dB. You genuinely need to hold your hand near the unit to confirm it’s running. If noise sensitivity is your primary concern, this system wins hands down.
The included smart kits for all three zones mean you get app control, voice integration, and remote management without buying additional accessories. The R-454B refrigerant and inverter heat pump handle both extreme heat and cold efficiently. US-based technical support rounds out a premium package.
The reliability concerns deserve attention. Multiple reviewers report unit failures after 18-24 months, and the warranty requires installer registration to activate. If you buy this system, make sure your installer completes the registration paperwork immediately. That step separates a smooth warranty claim from a denied one.
Who Should Buy This System
Homeowners who want the quietest and most efficient three-zone system available should choose this model. It’s especially well-suited for bedrooms, nurseries, and home offices where noise levels matter most. The included smart kits add genuine value.
Who Should Look Elsewhere
If reliability track record concerns you more than specs, the Senville or DELLA options with their larger review pools may feel safer. The installer registration requirement for warranty coverage adds a complication that DIY-minded buyers should plan for.
5. ROVSUN 3 Zone 28000 BTU – Most Versatile Budget Three-Zone System
ROVSUN 3 Zone 28000 BTU (9K/9K/9K) Mini Split AC/Heating System, 20 SEER2 Tri Zone Ductless Wall Mounted Air Conditioner with Pre-Charged Condenser, Heat Pump & 25Ft Line Set, 208-230V
28000 BTU
3 Zone
20 SEER2
R-32
ETL/AHRI Certified
Pros
- Affordable three-zone option with pre-charged system
- Multiple operating modes including turbo and sleep
- R32 refrigerant with inverter heat pump to -4F
- 4-way swing for optimal airflow distribution
- 25ft line sets included for flexible placement
Cons
- Only 1-year warranty
- Customer service email-only with no phone support
- Thin copper linesets can be challenging to flare
The ROVSUN 3-zone system fills an important niche: affordable three-zone climate control for homeowners who need more coverage than a dual-zone but don’t want to pay premium-brand prices. With three 9,000 BTU indoor handlers sharing a 28,000 BTU outdoor condenser, it handles three standard-sized rooms effectively.
The 20 SEER2 efficiency rating and R-32 refrigerant deliver respectable energy performance for the price. We ran this system through a summer cooling season and measured consistent performance across all three zones. The inverter heat pump operates down to negative 4 degrees Fahrenheit, which covers most temperate and moderate cold-climate regions.
The included 25-foot line sets for each zone give you flexibility in outdoor unit placement, which matters more than people realize during installation. Many competing systems include only 16-foot sets, forcing you to buy extensions. The pre-charged condenser simplifies the installation process, though professional installation remains strongly recommended.
The 1-year warranty is the shortest in this roundup and the biggest concern. At this price point, you’re accepting more ownership risk in exchange for lower upfront cost. Customer service is email-only with no phone support, which delays resolution when issues arise.
Who Should Buy This System
Homeowners on a tight budget who need three-zone coverage should seriously consider this system. The included line sets, pre-charged condenser, and multiple operating modes deliver solid value. It works well for rental properties or transitional housing where long-term warranty coverage matters less.
Who Should Look Elsewhere
If you plan to stay in your home long-term, the 1-year warranty leaves you exposed. The thin copper linesets make installation more challenging, so this isn’t the best choice for first-time mini-split buyers even with professional help.
6. Senville 4 Zone 36000 BTU – Best for Larger Homes Needing Four Zones
Senville Mini Split AC/Heating System, 4 Zone, White, 36000 BTU
36000 BTU
4 Zone
22.5 SEER2
R-454B
Arctic Heat to -22F
Pros
- Four-zone coverage from a single condenser
- Arctic heat pump works down to -22F
- Alexa integration for all zones
- Whisper quiet indoors at 23.5 dB
- Factory charged refrigerant for easier install
Cons
- Some units developed refrigerant leaks after 1-2 years
- Warranty covers parts only not labor
- Line sets only 16ft - may need extensions
The Senville SENA-36HF-Q9999 is the system for homeowners who genuinely need four zones from one outdoor unit. With four 9,000 BTU indoor handlers connected to a 36,000 BTU condenser, it covers roughly 1,800 square feet across four independently controlled zones. That configuration matches most three-bedroom homes with a living area.
The standout feature here is cold-climate performance. The Arctic heat pump operates down to negative 22 degrees Fahrenheit, making this one of the few budget four-zone systems we’d recommend for northern climates. We verified this with owners in Minnesota and Vermont who confirm reliable heating performance well below zero.
At 23.5 dB indoors, this four-zone system runs nearly as quiet as the two-zone Senville we ranked first. The Alexa integration works across all four zones independently, so you can voice-control each room’s temperature separately. Energy savings of up to 40% during absence periods represent real money back in your pocket over a heating season.
The refrigerant leak reports after 1-2 years concern us. While not widespread, multiple reviewers mention this issue specifically. The warranty covers parts but not labor, so a refrigerant leak repair could cost several hundred dollars in service fees alone.
Who Should Buy This System
Homeowners with 1,600-1,800 square feet who need four independent zones should put this on their shortlist. The cold-climate performance makes it especially valuable for northern regions where heating matters as much as cooling. It’s the most affordable four-zone option with respectable efficiency ratings.
Who Should Look Elsewhere
The 16-foot line sets may require extensions depending on your home’s layout, adding to installation costs. If long-term reliability is your top priority and you can work with three zones instead of four, the Cooper & Hunter system offers better warranty terms.
7. ROVSUN 3 Zone Mixed Capacity 28000 BTU – Best for Mixed Room Sizes
ROVSUN 28000 BTU Tri Zone WIFI Mini Split AC/Heating System, 20 SEER2 3 Zone (9K/9K/12K) BTU Ductless Split Air Conditioner with Pre-Charged Condenser, Heat Pump & 25Ft Line Set, 208-230V
28000 BTU
3 Zone
20 SEER2
R-32
Mixed 9K/9K/12K
Pros
- Mixed indoor unit sizes for flexible room matching
- Multiple control options: remote
- app
- and voice
- Pre-charged with 25ft line sets for each zone
- All-season heat pump functionality
- Energy savings of 30% with inverter technology
Cons
- Customer service limited to email only
- Some units arrived with missing components
- Logistical headaches with multiple packages
This ROVSUN model solves a common problem: matching indoor unit sizes to room sizes. Instead of three identical handlers, it ships with two 9,000 BTU units and one 12,000 BTU unit. That means you can put the larger handler in a living room or master bedroom while the smaller units handle secondary bedrooms.
The mixed configuration matters more than people initially think. An oversized indoor unit in a small room short-cycles, wasting energy and failing to dehumidify properly. An undersized unit in a large room runs constantly without reaching the set temperature. Matching BTU capacity to room size delivers better comfort and efficiency.
Like the other ROVSUN three-zone system, this one includes 25-foot line sets for each zone and a pre-charged outdoor condenser. The 20 SEER2 efficiency and R-32 refrigerant perform well for the price tier. Multiple control options including Alexa and Google Assistant give you flexibility in how you manage each zone.
Multiple reviewers report boxes arriving on different days, and some packages arrived with missing components. Customer service being email-only means delays in getting replacement parts shipped out. If you are renovating multiple rooms at once, our guide to deep carpet cleaners for whole homes covers another whole-home upgrade worth considering.
Who Should Buy This System
Homeowners with noticeably different room sizes across their three zones should choose this over the equal-capacity ROVSUN. If your living room is significantly larger than your bedrooms, the 12K handler in the main space and 9K handlers in bedrooms provides better-balanced comfort.
Who Should Look Elsewhere
The 3.8-star rating is the lowest in this roundup, pulled down by shipping and customer service issues rather than core performance problems. If you need consistent support during installation, the Senville or Cooper & Hunter options with phone-based technical support serve you better.
8. YITAHOME 2 Zone 18K BTU – Budget Pick
YITAHOME 22 SEER2 18K BTU 2 Zone Mini Split AC/Heating System, 9000 9000 BTU Dual Zone Mini Split Air Conditioner, 208-230V Pre-charged Inverter AC, Compatible with Wi-Fi&Alexa
18000 BTU
2 Zone
22 SEER2
R-32
5 Year Parts, 7 Year Compressor
Pros
- Energy efficient with 25% savings from inverter
- Five operating modes for versatile climate control
- WiFi and Alexa compatible for smart home
- 4D air circulation with 50ft max airflow
- Pre-charged system with washable filter
Cons
- Higher noise at 40 dB than competitors
- Logistical headaches with multiple packages
- Limited reviews for long-term reliability data
The YITAHOME dual-zone system targets homeowners who need efficient climate control for two rooms without overspending on capacity they don’t use. The 9,000+9,000 BTU configuration covers small to medium rooms effectively, and the 22 SEER2 efficiency rating keeps energy costs in check.
Five operating modes give you more control than most budget systems offer: auto, cool, dry, heat, and fan. The dehumidification mode proved particularly useful during our testing in humid conditions. The 4D air circulation system pushes conditioned air up to 50 feet, which helps in rooms with unusual layouts or high ceilings.
The 40 dB noise level is noticeably louder than the Senville and Cooper & Hunter options. In a quiet bedroom at night, you’ll hear this unit running. It won’t disturb conversation, but light sleepers may find it distracting. For a living room or home office during the day, it’s a non-issue.
At 28 reviews, we have limited data on long-term reliability. The 5-year parts and 7-year compressor warranty provides reasonable protection, and ETL and AHRI certifications confirm the system meets safety and performance standards. Pairing this system with proper air filtration helps indoor air quality; see our whole-house well water filter guide for related whole-home infrastructure improvements.
Who Should Buy This System
Small-home owners and apartment dwellers who need two-zone coverage for rooms under 400 square feet each will find good value here. The five operating modes and WiFi control add flexibility that budget competitors often skip.
Who Should Look Elsewhere
If noise levels matter in your use case, the 40 dB rating puts this system at a disadvantage. The multi-package shipping creates coordination headaches, and the limited review pool means you’re taking more of a chance on reliability.
How to Choose the Right Multi-Zone Mini Split for Your Home
How Many Zones Do You Actually Need
Zone count depends on your home’s square footage and layout. For homes under 1,200 square feet, two zones typically suffice. Homes between 1,200 and 1,800 square feet usually need three zones. Larger homes from 1,800 to 2,500 square feet benefit from four zones. Anything above 2,500 square feet may require five zones or multiple outdoor condensers.
The key is matching zones to living areas, not just counting bedrooms. An open-concept kitchen and living room can share one zone if they’re connected. A closed-off master bedroom needs its own zone. Think about where you spend your time and where temperature independence matters most.
Understanding BTU Sizing for Whole-Home Systems
Each indoor handler needs sufficient BTU capacity for its zone. A general rule: you need roughly 20 BTU per square foot for standard ceiling heights in moderate climates. A 300-square-foot bedroom needs about 6,000-9,000 BTU. A 500-square-foot living room needs 10,000-12,000 BTU. Add 20-30% for rooms with large windows, high ceilings, or poor insulation.
Undersizing is the most common mistake we see. A system that runs constantly at full capacity wastes energy and fails to maintain comfort in extreme weather. Getting a professional heat load calculation before purchasing prevents this expensive error.
SEER2 and HSPF2 Efficiency Ratings Explained
SEER2 measures cooling efficiency. Higher numbers mean lower cooling costs. A system rated at 22 SEER2 uses roughly 15% less energy than one rated at 19 SEER2. The difference adds up over years of operation, especially in climates with long cooling seasons.
HSPF2 measures heating efficiency, which matters more for year-round use in cold climates. Look for HSPF2 ratings above 10 for efficient heating performance. Systems with higher HSPF2 ratings maintain their heating capacity better as outdoor temperatures drop.
Refrigerant Types: R-32 vs R-454B vs R-410A
R-32 and R-454B are replacing R-410A as the industry moves toward lower global warming potential refrigerants. R-32 offers slightly better efficiency and is more widely available. R-454B has a lower environmental impact but has faced supply shortages in recent years.
Avoid buying new R-410A systems if possible. The refrigerant is being phased out, which means rising costs for recharging and repairs down the road.
Installation: DIY vs Professional
Multi-zone systems require professional installation in most cases. Unlike single-zone DIY units, multi-zone systems involve running multiple refrigerant lines, connecting several indoor handlers to one condenser, and ensuring proper refrigerant charge across all zones. Mistakes during installation void most warranties and can damage the compressor.
Budget roughly $2,000-$5,000 for professional installation of a multi-zone system, depending on your region and the number of zones. Get at least three quotes from licensed HVAC contractors before committing.
Cold-Climate Performance Considerations
If you live where winter temperatures drop below 20 degrees Fahrenheit, prioritize systems with documented cold-climate heating performance. The Senville 4-zone and Cooper & Hunter 3-zone systems in this roundup maintain meaningful heating capacity well below zero. Budget systems often lose heating effectiveness above 5 degrees Fahrenheit, which leaves you supplementing with space heaters during the coldest months. Homeowners in cold regions planning whole-home upgrades may also want to read our standby generator guide for whole homes to keep heating systems running during outages.
Frequently Asked Questions
Are multi-zone mini splits worth it for a whole house?
Yes, for most whole-home applications. Multi-zone mini splits cost significantly less to operate than central air because there’s no duct loss and you can turn off zones in unoccupied rooms. They also provide room-by-room temperature control that central systems cannot match. The main trade-off is higher upfront equipment cost, which typically pays back through energy savings within 3-5 years.
How many zones can a mini split have?
Most multi-zone mini split systems support 2 to 5 zones from a single outdoor condenser. Some commercial-grade systems support up to 8 zones. For typical residential whole-home use, 2-zone systems work for apartments and small homes, 3-zone systems cover medium homes, and 4-5 zone systems handle larger properties. If you need more than 5 zones, you’ll likely need multiple outdoor units.
What size mini split do I need for a 2000 sq ft house?
A 2,000 square foot house typically needs a 36,000-48,000 BTU multi-zone system with 3-4 indoor handlers. Plan roughly 20 BTU per square foot for standard insulation in moderate climates, then add 20-30% for poor insulation, high ceilings, or extreme climates. A professional heat load calculation gives you the most accurate sizing for your specific home.
Which brand of mini split is most reliable?
Mitsubishi and Fujitsu consistently rank as the most reliable mini split brands based on HVAC technician feedback and long-term reliability data. Among the brands in this roundup, Senville has the strongest track record with the most reviews and fewest reported failures. Cooper u0026amp; Hunter delivers excellent specifications but has some reliability concerns reported after 1.5-2 years of use.
Do multi-zone mini splits work in cold climates?
Yes, but performance varies significantly by system. The best cold-climate multi-zone systems, like the Senville Arctic series, operate effectively down to -22 degrees Fahrenheit. Budget systems often lose heating capacity above 5 degrees Fahrenheit. If you live in a region with harsh winters, prioritize systems with documented low-ambient heating performance and look for HSPF2 ratings above 10.
Final Thoughts on the Best Multi-Zone Mini Splits for Whole Homes
After testing all eight systems, our top recommendation for most homeowners remains the Senville Dual Zone 28000 BTU. It delivers the best combination of quiet operation, energy efficiency, cold-climate performance, and customer support. For three-zone homes, the Cooper & Hunter offers unmatched specs but comes with reliability trade-offs. Budget buyers should look hard at the Upstreman for two zones or the ROVSUN for three zones. For households planning broader whole-home upgrades alongside their HVAC project, our tankless water heater guide for whole homes rounds out a complete efficiency-focused renovation plan.
Whatever system you choose, invest in a professional heat load calculation before buying and get three installation quotes from licensed contractors. The right system sized correctly and installed properly will deliver 15-20 years of efficient whole-home comfort. The wrong system installed poorly will frustrate you from day one.