10 Best Mini Splits for Tiny Houses (October 2026) Reviewed

A 150 to 500 sq ft tiny house needs one single-zone 9,000 BTU ductless mini split heat pump, and that is the honest answer to the best mini splits for tiny houses question. Anything larger is dead weight, costs more to run, and short-cycles until it drives humidity into the walls. I have spent the last two months working through ten 9,000 and 12,000 BTU systems, reading the service data, the decibel ratings and the install restrictions on each one, and talking to owners who put them in spaces as small as 231 sq ft.

The result is a list that is deliberately boring. Nine of these ten are 9,000 BTU, all run on 115V circuits, and nine of them cool somewhere between 400 and 450 sq ft. That redundancy is the point. Your tiny house is not a hard sizing problem, it is a wall space, line set length and noise problem.

If your build is larger than 500 sq ft, or you are trying to heat and cool an entire ADU rather than one open room, read our guide to how many mini splits you need first. For everyone else, keep reading, because the difference between a great 9,000 BTU unit and a disappointing one has almost nothing to do with brand.

Our Top 3 Mini Splits for Tiny Houses in 2026

Comparing 10 Mini Splits for Tiny Houses Side by Side in 2026

Every unit below is a real single-zone system, not a bundle. The three columns that matter most for a small build are coverage, indoor noise and whether it needs a 230V circuit.

1. Della Vario Series 9000 BTU – The Best All-Round Pick for Small Builds

This is the unit I kept coming back to while I worked through the list. It covers 400 sq ft, runs on 115V, and the 19 SEER2 inverter sits in the middle of the pack where efficiency stops mattering much and installation reality starts. The 28 dB indoor head is quiet enough to sleep next to, which matters more in a 231 sq ft space than any spec sheet tells you.

The annual energy figure listed for it is 711 kWh, and several owners who moved off a window unit report roughly a 30 percent drop in summer electricity. My read is that the smart sensor reading temperature at the remote control, paired with I Feel mode, is the feature that actually prevents short cycling in a tight space. The unit matches the hand rather than blasting for ten minutes and stopping.

It heats down to -4F, so it is not a cold climate machine. If your tiny house sits in northern Minnesota or rural Maine and you need backup heat at -10F, look further down the list.

Physically the head measures 31.94 in wide, 11.5 in tall and 8 in deep. On a 9 ft interior wall in a tiny house that is a modest footprint, and it clears the usual manufacturer requirement for a couple of feet of space at each end. The whole shipping weight is 19.8 lb, which is one of the lighter two-piece systems in this group and the easiest to get up a ladder or into a loft.

Why 19 SEER2 and 711 kWh Matter More Than You Think

A 9,000 BTU system cooling a 400 square foot room is a small problem, so raw capacity is never the constraint. Efficiency decides whether the system can run for long, low stretches instead of hammering. At 19 SEER2 with an inverter compressor that adjusts speed automatically, this unit steps into a lower band and stays there, which is exactly the behaviour that keeps a small room comfortable and the coil dry.

Installation Reality: This Is Not a DIY Unit

The single most common complaint in the reviews is that buyers assumed a kit with a 16.4 ft line set meant plug-and-play. The manufacturer mandates professional installation, and the line set still needs to be vacuumed with the system sealed. The kit also includes 78.7 in of drain pipe, which matters in a tiny house where the nearest sink may be six feet away.

Who This Is For

It suits a builder who wants a well-rounded unit, a sensible efficiency number, app control and a light indoor head, and who is arranging a professional install anyway. It is less suited to a buyer chasing a long warranty or a cold-climate rating, since both are modest here.

2. COSTWAY 9000 BTU – The Best for Small Spaces Indoor Head and the Widest Coverage Claim

This unit covers the most square footage claimed by any 9,000 BTU system here, at 450 sq ft, and pairs that with a 23 dB indoor head. In a loft with a sloped ceiling, that extra coverage claim is the difference between a system that keeps up on a July afternoon and one that runs continuously without catching up.

Buyers moving from window units report two consistent effects: the room cools quickly, and the electricity bill roughly halves. Both make sense given a 19 SEER2 rating and an inverter compressor that ramps rather than switches. The dry mode also gets singled out for pulling real moisture out of small rooms, which is the hidden problem in a lot of tiny houses.

Documentation is the weak spot. The remote manual does not explain the C and F toggle or how auto mode behaves, and the drilling template is slightly off. None of that is dangerous, but on a wall where you only get one shot at drilling, read the community install notes first.

Seven operating modes, four fan speeds and 4D auto swing give you more control granularity than most units in this list. Owners also note the fan can be so quiet that you cannot tell whether it is running, which is either a selling point or a source of doubt depending on your temperament.

Coverage, Clearance and the Indoor Unit Footprint

At 31.2 in wide, 11.5 in tall and 8 in deep, the head is essentially the same size as the Della Vario. The 450 sq ft claim is the differentiator, though treat it as a maximum rather than a promise, and note that the review record contains a small group of owners describing a faint rotor noise in heat mode.

Heating Performance and the R32 Question

It uses R32 refrigerant and is ETL and AHRI certified, rated at 820 watts. Heating capacity is listed at 10,000 BTU/h against 9,000 BTU of cooling, which is normal for a heat pump that uses a different output figure for the heating side. For a tiny house that needs a little supplemental heat on winter mornings, the inverter’s steady output is the useful part.

Who This Is For

It fits a builder who wants maximum claimed coverage from a 9,000 BTU unit, who is sensitive to indoor noise at night, and who plans to control humidity deliberately rather than hoping the compressor handles it.

3. Senville LETO 9000 BTU – Best Efficiency and the Longest Warranty Here

The LETO is the only system here that pairs 21.5 SEER efficiency with a five-year parts and five-year compressor warranty, and it carries the largest review base in the group at more than 1,600 ratings. It also heats down to 5F, which makes it a genuine three-season option rather than a cooling product with a warm-weather bonus.

At 25 dB it is quiet, and the operating experience described by owners is steady rather than dramatic. Control runs through an app with routine scheduling plus Alexa, and the kit includes a 16 ft pre-loaded line set and the communication wire, so the parts list for a small build is complete.

Two cautions. The warranty excludes labour, which in a tiny house with a tight crawlspace can be the most expensive line item. And 9,000 BTU across 400 sq ft is genuinely tight for an open-plan interior with a sleeping loft, where the effective ceiling height is well above eight feet.

The head measures 37 in wide and 12 in tall, which is the largest indoor unit in this roundup. On a longer wall that is not a problem, but on an 11 ft wall it eats a meaningful share of the surface. Confirm the mounting height and the manufacturer clearance before you commit.

What 21.5 SEER Actually Changes on a 400 Sq Ft Footprint

On a load this small, the gain from efficiency is real but modest compared with capacity headroom. What 21.5 does buy is a wider operating band, meaning the compressor spends more time at part load and less time at full blast. Part load is also the mode that controls humidity well, so this unit is a solid choice in a humid summer climate.

Heating Down to 5F and the R-454B Refrigerant

Heat pump operation to 5F/-15C covers most of the shoulder seasons in temperate zones and all of a mild winter. Below that you need a low ambient or hyper heat design, which only two units here provide. R-454B refrigerant is the newer low-GWP standard and is what most current residential systems are shipping with.

Who This Is For

It suits an owner who wants a long warranty, high efficiency and credible heating performance in a temperate climate, and who will pay a professional installer rather than attempt the install. If wall length is your binding constraint, check the 37 in head width first.

4. ROVSUN 9000 BTU – Best Smart Home Integration at 115V

ROVSUN is the pick for a builder who wants full voice and app control on a standard household circuit. Twenty SEER2 is the second-highest rating among the 115V units here, and the 28 dB mute mode is genuinely inaudible in a small room. The kit includes a 16.4 ft copper line set and signal cord.

The ownership reports are unusually loyal, with several multi-season owners describing reliability and repeat purchases. The 4.2 star average reflects a smaller critical group, mostly about documentation rather than performance.

That documentation gap is real and worth knowing: the manual jumps from connecting the copper lines straight to operation without covering the leak test. A professional will do it correctly, but a self-installer following the book could miss a step that matters.

One documented review describes persistent indoor dampness and mould after install with unresponsive support. A single report does not condemn the unit, but in a tiny house where the building envelope is tight, condensate handling deserves attention during commissioning rather than after the walls stain.

115V Power and the Practical Limits of a 875 Watt Draw

Running on 115V at 875 watts means no panel work, no double-pole breaker and no electrician for the circuit, which is the single biggest cost and schedule saver in a tiny house build. The trade-off is that a 9,000 BTU compressor on 115V is working with less headroom than the 230V units here, so expect the fan to run a little more at peak load.

Operating Range and Heating Limits

The listed operating range is 61F to 88F, which describes when the unit performs at full rated capacity rather than a hard cutoff. Auto-defrost handles cold outdoor conditions, but this is not a low ambient design. In a true cold-climate tiny house, pick a hyper heat unit instead.

Who This Is For

It fits an owner who wants voice control, strong efficiency and a single standard circuit, and who is comfortable using an HVAC professional to close out the install. It is a poor match for a self-installer who relies entirely on the printed manual.

5. Albott 12000 BTU – The Only Unit With Real Capacity Headroom

This is the only 12,000 BTU system in the list and the only one that stays comfortably ahead of a 400 sq ft space. If your tiny house is 500 to 750 sq ft, has a sleeping loft, or faces serious west-facing glass, the extra capacity is the reason to consider it.

It also carries the best warranty coverage in the group, five years on the compressor and seven years on parts, plus a self-cleaning function that runs the indoor coil hot. That routine matters in a small house with limited access to the head.

The efficiency rating is the weak point at 18 SEER2, the lowest here, and the 151 lb listed weight is the heaviest in the roundup. Neither is disqualifying at this size, but both show what you trade for capacity.

When Oversizing Actually Hurts in a Small House

Most tiny houses fall between 150 and 400 sq ft, and a 12,000 BTU unit in a 200 sq ft room will cycle on and off constantly because it reaches set temperature almost immediately. That short cycling is the single most common sizing mistake we see, and it hurts humidity control more than it hurts the compressor.

For a 200 sq ft space the correct move is the 9,000 BTU class. Reserve this unit for footprints above 500 sq ft or for a tiny house with a lot of glazing and glass doors on a sun-facing wall.

Warranty, Self-Cleaning and Long-Term Ownership

A seven-year parts warranty on a self-contained heat pump is unusual at any price point and materially reduces the risk of an early failure in a remote build. The self-cleaning cycle reduces the filter and coil upkeep that a tiny house owner often skips. App and remote control with a 24-hour timer, sleep mode and child lock round out a genuinely full feature set.

Who This Is For

It suits a builder with a larger tiny house, a loft, or significant west-facing glass, and for an owner who values warranty length and low maintenance above peak efficiency. For a compact 200 to 300 sq ft build, choose a 9,000 BTU unit instead.

6. Rellytech 9000 BTU – The Cheapest Route to 115V Comfort, With a Noise Catch

Rellytech is the entry point on this list, and the review record says it does more than its listing suggests. Owners who moved from window units in Florida and Nevada describe holding about 78F indoors with serious moisture removal, which is the dry-mode behaviour you want in a humid season.

It is also a true 115V system with no panel work, at 19 SEER2 and HSPF2 8.5. Four fan speeds, a 90 degree vertical swing, ECO mode, sleep mode, a 24-hour timer and an LED-off function cover the basics well.

The 42 dB figure is the catch. That is a real difference from a 23 dB head, and in a 200 sq ft room with a sleeping platform you will hear it at the low setting. If the house is a workshop or a garden office used in daylight, it does not matter.

Two documentation problems are worth flagging before purchase. The feature list claims coverage up to 550 sq ft while the spec sheet says 450 sq ft, and buyers who skip the vacuum and gauge step simply will not get the unit running. The listed annual consumption of 907 kWh is the highest figure in this group alongside the TURBO.

Humidity Control Versus Noise: The Real Trade

Dry mode in a humid climate is worth more than silence for a lot of tiny house owners, because moisture in a small envelope shows up as mould on the shell sheathing. Rellytech scores well there, and the 42 dB operating noise is the price. A house that is slept in is a different question than a shed used for tools.

Installation: Straightforward Once You Have the Right Tools

Buyers describe the install as manageable with the included template and mounting plate, provided they own a vacuum pump and gauge set. The head is compact at 30.7 in wide, 11.4 in deep and 8.7 in tall, which is one of the smaller profiles here, and the listed weight of 66.4 lb covers both pieces.

Who This Is For

It fits a builder on a tight budget who lives in a humid climate, uses the space in daylight, and is comfortable doing or contracting the install themselves. It is the wrong choice for a bedroom where a 25 dB head matters more than dry mode.

7. Mountman 9000 BTU – The Top Rated Unit, Built Around ECO Mode

The Mountman has the highest average rating of the ten, at 4.5 stars across 352 ratings, with only 5 percent one-star. The critical feedback is thin, which is a meaningful signal in a category where most listings carry a long tail of installation complaints.

Its centre of gravity is efficiency. ECO mode is claimed at up to 30 percent energy savings, the compressor is a 19 SEER2 inverter, and the refrigerant is pre-charged R32. The high-temperature self-cleaning cycle and washable anti-dust filter cut the maintenance load, which is valuable when the head is 8 ft up in a loft.

The 26 dB sleep mode is the second quietest here, and the remote display auto-off after 10 seconds means the panel is not glowing across a dark room. What you give up is connectivity. This is a remote-only unit with no WiFi and no voice assistant.

Two data points deserve a second look. The feature list claims cooling up to 750 sq ft while the spec sheet says 450 sq ft, and the listed wattage of 2647.53 W is far above what a 9,000 BTU inverter typically draws. Size it against the spec sheet, not the marketing line, and check your circuit with a load calculation.

Automatic Defrost and Heating in a Cold Tiny House

Automatic defrost is what keeps heating stable when the outdoor coil ices up, and it is a meaningful inclusion for a four-season tiny house. The listing does not publish a low ambient heating floor, so treat it as a shoulder-season and temperate climate machine rather than a -13F design.

Physical Fit and Mounting

The indoor head is 32.28 in wide, 11.93 in tall and 8.23 in deep, so it fits the same wall span as the 9,000 BTU Della units. Manufacturer clearances at each end still apply, and the remote-only control means you will be reaching for it rather than your phone.

Who This Is For

It fits an owner who wants the highest rated, quietest-running unit with strong energy savings and minimal maintenance, and who does not need app or voice control. It is a strong pick for a full-time tiny house on a standard 120V circuit.

8. DELLA Optima 9000 BTU Hyper Heat – Built For Cold Climates

If your tiny house is genuinely four season and cold, this is the only 9,000 BTU unit in the list that heats to -13F. Hyper heat operation and a 10 HSPF2 heating rating mean it is doing real heat pump work on a January evening rather than idling near its capacity limit.

Efficiency is the other headline. At 24 SEER2 this is the highest seasonal rating here, and the unit is Energy Star certified with stated rebate eligibility. At 115V and 730 watts, it also draws less than most 9,000 BTU systems in this roundup.

The owner feedback is the most polarized of the group. Buyers who want cold climate capability and maximum efficiency rate it highly; buyers who compare it against cheaper 9,000 BTU options find the price hard to justify. That is a fair reaction.

The kit includes a 16.4 ft pre-flared insulated line set and a 6.56 ft drain extension, and line sets under 25 ft need no refrigerant adjustment. Beyond 25 ft, an adjustment is required, which is a real constraint in a tiny house where the outdoor unit may be forced to sit a fair distance from the wall penetration.

Cold Climate Heating and the 10 HSPF2 Rating

HSPF2 measures heating output per watt of electricity. A 10 HSPF2 with 9,000 BTU of cooling and 10,000 BTU/h of heating puts this unit in the same efficiency class as the best cold climate residential systems, and the gold-plated coil finish is specifically designed to resist freezing and corrosion in outdoor conditions.

What the Efficiency Gap Is Worth Over Time

Compare 24 SEER2 to an 18 SEER2 unit and the annual difference in a 400 sq ft space is meaningful but not dramatic, because the load is small. The cold climate capability is what actually differentiates this unit, and that only matters if you run the house through winter. The WiFi and Alexa integration runs through the Della+ app alongside the 4D airflow, I Feel mode and six operating modes.

Who This Is For

It suits a four-season tiny house in a cold climate, an owner who wants the highest efficiency and the best heating performance available at this size, and who can use rebate eligibility to offset the premium. In a mild climate it is over-specced for the job.

9. Temprium 9000 BTU – The Most Feature-Rich Control Set at 115V

Temprium combines the highest efficiency rating among the 115V units that also offer full voice control with a 23 dB indoor head. Seven operating modes and seven fan speeds give unusually fine-grained control, and 4D auto swing with turbo and follow-me functions are all present on a standard household circuit.

For a tiny house that is a meaningful amount of adjustment in a small volume. Setting the head to follow-me lets you keep the living area at one temperature and the sleeping loft at another by moving the remote, without zoning the system.

The honest weakness here is the evidence base. At 153 ratings it is the thinnest review pool in the group, and the warranty is one year. Long-term reliability data simply does not exist yet for this listing.

The head is the narrowest in this roundup at 29.96 in wide, 7.87 in deep and 11.61 in tall, with a listed weight of 40.8 lb. The 133F high-temperature self-cleaning function and a washable air purification filter both reduce the maintenance burden in a tight space, and it is ETL and AHRI certified.

22 SEER2 on 115V and What It Means for the Bill

R32 refrigerant with a 22 SEER2 rating in a 780 watt package is an efficient combination. On a 400 sq ft footprint the compressor spends most of its life at part load, which is where humidity control and steady temperature come from. Cooling is rated to 122F outdoor, which covers most hot summer peaks.

Heating to 5F and the Limits of the Listing

Heating down to 5F covers temperate four-season use but not a hard winter climate. The stated annual consumption figure of 1.3 kWh is listed inconsistently with typical listings for this class, so read the efficiency rating rather than the consumption line when you compare.

Who This Is For

It fits an owner who wants maximum control options, voice assistants, high efficiency and a 115V install in a compact wall space. Buyers who prioritise a long warranty or a deep body of owner feedback should choose one of the higher-volume picks instead.

10. TURBRO Greenland 9000 BTU – Highest Efficiency, but 230V Only

The TURBRO pairs the highest efficiency rating in the list with a genuine low ambient heating range, cooling to 131F and heating to -13F. It is also Energy Star certified and described as eligible for federal tax credits, which can offset part of the cost in a new build.

Response speed is the stand-out engineering claim. A high-frequency inverter cooling in as little as 30 seconds, paired with a large drum-shaped impeller fan for long air throw, makes sense in a long narrow tiny house where the head sits at one end.

There is one hard blocker for a lot of builds. This is a 230V system, so without an existing double-pole breaker you are looking at panel work, and in an off-grid or solar tiny house that conversation is much larger.

The 67-review base is thin, and the listed 89.1 lb weight is on the heavy side for getting both pieces into a loft. The install guide is described as a step-by-step document with a numbered wiring diagram, which is better documentation than most units in this roundup provide.

230V Requirements in an Off-Grid or Solar Tiny House

A 230V heat pump needs a 240V double-pole breaker, and the panel needs the capacity for it. If your tiny house runs on a battery bank, the inverter also has to be sized to carry the compressor surge, not just its average draw, which is a common and expensive oversight during off-grid builds.

Operating Range and Cold Climate Capability

Cooling to 131F outdoor and heating to -13F is the widest range in this list alongside the DELLA Optima. In a cold climate, that means the system can carry the whole load in winter instead of dropping to a backup unit, which is the whole argument for paying more for a low ambient design.

Who This Is For

It suits a builder who already has 230V service or a solar array sized to carry it, who wants maximum efficiency in a cold climate, and who can absorb a thinner long-term reliability record. For a standard 120V panel, choose one of the 115V units instead.

How Big a Mini Split Do You Need for a Tiny House?

A tiny house between 150 and 500 sq ft needs a 9,000 BTU single-zone unit. Use 20 BTU per square foot as a starting rule, then adjust down for good insulation and small windows, or up for west-facing glass, a sleeping loft or extra ceiling height. Never size above the room, because oversizing causes short cycling and poor dehumidification.

Owner evidence supports the low end. A tiny house of roughly 11 by 21 ft, about 231 sq ft, was discussed in r/DIY with the conclusion that a 9,000 BTU unit is sufficient on pure square footage alone. Most tiny house builders land between 200 and 400 sq ft, which is squarely the 9,000 BTU band.

Here is the sizing map most builders end up using:

• 150 sq ft – 9,000 BTU is more than enough, and the smallest available capacity
• 200 sq ft – 9,000 BTU, do not step up
• 250 sq ft – 9,000 BTU, the sweet spot for most tiny houses
• 300 sq ft – 9,000 BTU, or 12,000 BTU with heavy glazing
• 400 sq ft – 9,000 BTU rated for 400 sq ft, or 12,000 BTU for an open plan with a loft
• 500 sq ft – 12,000 BTU, the point where capacity starts to matter
• 576 sq ft (24 by 24 garage) – 12,000 BTU is the right starting point

Two adjustment factors move the number more than square footage does. Ceiling height does, because a 10 ft interior gives the unit more air volume to condition than the floor area suggests. Solar load does, because a west wall of glass in a small house can add the equivalent of a much larger room’s worth of heat gain.

What to Check Before You Order: Noise, Line Set, Power and Brand Tier

Ducted vs Ductless in a 200 Sq Ft Space

Ductless wins in a tiny house almost without exception. A ducted mini split needs supply and return duct runs, a plenum space and ceiling height you probably do not have, and every foot of flex duct costs you efficiency. A ductless head needs a wall bracket, a small service cavity and a line set through one penetration.

The one place a short duct run makes sense is if you want to push air into a sleeping loft. Even then, most builders use a short insulated duct off a ductless head rather than a fully ducted system.

Noise Floor and Sleep in a Small Room

This is the factor competitors skip and tiny house owners care about most. Our list runs from 23 dB to 42 dB, and in a 200 sq ft room with hard surfaces those decibels do not disappear quietly. If you sleep in the space, stay at or below 28 dB.

Useful context from the owner record: on forum.solar-electric.com, a Fujitsu owner described the quietness indoors and out as such an improvement over a window unit that it became the headline benefit. On r/AirConditioners, owners reported disrupted sleep from portable AC noise, the same complaint that would follow an oversized unit running hard all night.

Our full breakdown of the quietest systems is in quietest mini splits tested and reviewed.

Line Set Length and Where the Outdoor Unit Goes

Most residential systems cap the line set run at 75 to 100 ft, and capacity drops as the run lengthens. The kits here ship with 16 to 16.4 ft of line set, which is generous for a tiny house, but the outdoor unit location is often dictated by code, shade and structural rules rather than by convenience.

Plan the penetration before you order. A tiny house has limited exterior wall, so drilling through a wall or a skillion roof for a chase is a bigger job than the refrigerant side suggests. Confirm the clearance requirements around the outdoor unit and the minimum vertical rise before you settle on a head location.

115V vs 230V and Off-Grid Power

Nine of the ten units here run on 115V, which means an ordinary single-pole breaker and no electrician. That single fact removes several hundred dollars and a day of schedule from most tiny house builds, and it is why we would not start anywhere else.

For off-grid and solar builds, size the inverter for compressor surge rather than average draw. Owners building solar-first homes frequently discover after the fact that a heat pump is the largest single load in the system, and a battery bank sized for lighting and a fridge alone will trip on a hot afternoon.

Efficiency, Warranty and Brand Reputation

SEER2 measures cooling efficiency, HSPF2 measures heating efficiency, and on a small footprint both matter mainly because they determine how long the compressor runs at part load. Anything at 19 SEER2 or above is solid here, and 24 SEER2 is genuinely excellent.

On brand reputation, the pattern in owner discussion is consistent: Mitsubishi, Daikin, Fujitsu, Trane and Lennox are treated as the reliable tier, largely because of dealer networks and parts availability. The Gree OEM question, which comes up most often around MRCOOL, is a genuine debate with plenty of disagreement in both directions. In a remote tiny house, a brand with no local dealer is a real cost, so check parts access before falling in love with a low purchase price.

Warranty terms vary more than buyers expect. Several units here carry only one year, and the best warranty here is five years on the compressor and seven on parts. On a system expected to run fifteen years in a hard-to-reach location, that spread matters.

Condensate Drainage and Maintenance

Mini splits produce a surprising amount of water in humid weather, and a tiny house often has a sink only a few feet from the head. A short drain run gives you almost no gravity slope, so plan for a longer route to a drain, an exterior exit or a pump.

Rinse the washable filters monthly, and take advantage of the high-temperature self-cleaning cycles that several units here include. In a small envelope, a dirty coil shows up as smell and reduced capacity long before it shows up as a comfort problem.

Frequently Asked Questions

The Best Mini Split for Tiny Houses: Final Word

For most people building between 150 and 400 sq ft, the Della Vario 9000 BTU is the right buy. It hits 400 sq ft, runs on 115V, delivers 19 SEER2 and a 28 dB indoor head, and ships with a 16.4 ft line set, which covers the constraints that actually trip people up.

If you want a longer warranty and better efficiency in a temperate climate, take the Senville LETO. If noise at night is the deciding factor, the COSTWAY covers the most claimed square footage at 23 dB. For a genuinely cold four-season house, the DELLA Optima is the only 9,000 BTU option that heats to -13F, and for maximum energy efficiency on an existing 230V panel, the TURBRO Greenland leads the spec sheet.

Whatever you choose, size it to the room, not to the fear of a hot afternoon, and plan the line set and drain run before the wall is closed. Get the specs and current pricing for your unit, then decide.