How does a mini-split work?

A mini-split transfers heat between an outdoor compressor and indoor air handlers using refrigerant lines. In cooling mode, it absorbs heat from inside and releases it outside. In heating mode, it absorbs heat from outside air (even in cold weather) and releases it inside. The system uses inverter-driven compressors that ramp up and down to maintain a consistent temperature, more efficient than the on/off cycling of traditional HVAC.

How long do mini-splits last?

With proper maintenance, a mini-split lasts 15–20 years. Regular filter cleaning (monthly during heavy use), annual professional servicing, and keeping the outdoor unit clear of debris all extend system life. Mitsubishi systems we install come with 12-year warranty options covering compressor and parts.

Are mini-splits noisy?

No. Mini-split indoor units operate at 19–30 decibels, comparable to a whisper or rustling leaves. The compressor sits outside, so the loudest component is away from your living space. This makes mini-splits significantly quieter than window units (50+ dB) and most central air systems (40–50 dB).

What is a cooling-only mini-split?

A cooling-only mini-split is a ductless air conditioner without heating capability. These AC-only units cost $500–$1,500 less per zone than heat pump models and are ideal for Denver homes that already have a furnace but need targeted cooling in specific rooms. Perfect for garages, sunrooms, bonus rooms, or server rooms.

Are cooling-only mini-splits cheaper than heat pump models?

Yes at list price—cooling-only mini-splits cost $500–$1,500 less per zone than heat pump models. A single-zone cooling-only system runs $4,500–$8,500 installed vs $5,000–$10,000 for a heat pump. However, heat pump models qualify for Xcel Energy rebates that can make them cheaper out-of-pocket than cooling-only. Cooling-only makes sense only when Xcel rebates don't apply (e.g., ineligible area).

Do cooling-only mini-splits qualify for rebates?

Cooling-only mini-splits qualify for fewer rebates than heat pump models. They don't qualify for Xcel Energy heat pump rebates or the (now-expired) federal 25C tax credit. However, they may qualify for smaller efficiency incentives. The trade-off is lower upfront cost. Even without rebates, cooling-only units often cost less out-of-pocket than rebated heat pump models.

How much does mini-split installation cost in Denver?

Mini-split installation in Denver costs $5,000-$10,000 for a single-zone system and $9,000-$15,000 for multi-zone systems. Price depends on the number of indoor units, system capacity, and installation complexity. As a Mitsubishi Diamond Contractor, we offer systems with 12-year warranties. Rebates and incentives can help offset the initial cost.

How much does a mini split cost in Denver?

A single-zone mini split (one indoor unit + outdoor condenser) costs $5,000-$10,000 installed in Denver. Multi-zone systems (2-4 indoor units) cost $9,000-$18,000. Heat pump models (heating+cooling) cost $500-$1,500 more per zone than cooling-only units. Price includes equipment, installation, permits, and refrigerant lines. Heat pump mini splits qualify for Xcel Energy and federal rebates; cooling-only models do not.

Can a mini split heat a whole house?

Yes, but layout matters. Multi-zone mini splits can heat a whole house if rooms are open-plan or connected. A 2,000 sq ft home typically needs 3-4 indoor units (one per major zone: master bedroom, living area, secondary bedrooms). Closed-off rooms with doors make whole-home coverage harder. Most Denver homeowners use mini splits for primary living areas (bedrooms, office, living room) and keep existing furnace for backup or rarely-used spaces.

Mini-split vs central AC: which is better for my home?

Mini-splits are better for homes without existing ductwork, room additions, or targeted zone control. Central AC is better if you already have ductwork and want whole-home cooling. Mini-splits are 15-30% more energy efficient than central systems because they eliminate duct losses. They're also quieter (19-30 decibels) and allow independent temperature control for each room.

Do mini-splits work for heating in Colorado winters?

Yes. Cold-climate mini-split heat pumps work efficiently down to -13°F. Models like the Mitsubishi Hyper-Heat provide reliable heating throughout Colorado winters. They use inverter-driven compressors to maintain heating capacity even in extreme cold. Many homeowners use mini-splits as their primary heating and cooling system, eliminating the need for a furnace.

How many mini-splits do I need for my home?

For targeted comfort, one mini-split per room or zone is typical. Most homeowners install units in bedrooms and main living areas (2-4 units total). For whole-home coverage in a 2,000 sq ft house, you'd typically need 3-4 indoor units connected to one outdoor condenser. We assess your home's layout during a free estimate to recommend the right configuration.

Are mini-splits energy efficient compared to traditional HVAC?

Yes. Mini-splits achieve SEER ratings of 18-30, compared to 14-18 for traditional central AC. They eliminate 25-30% energy loss from ductwork and use variable-speed compressors that adjust output based on demand. This results in 15-30% lower energy costs compared to traditional HVAC systems. Mini-splits also provide both heating and cooling in one system.

Can mini-split heat pumps work in cold climates?

Yes. Cold climate mini-split heat pumps like the Mitsubishi Hyper-Heat series maintain full heating capacity down to -13°F using enhanced inverter compressors and vapor injection technology. In Denver, where winter design temperatures hit 5°F and overnight lows regularly reach the teens, cold climate models provide reliable primary heating without backup. Standard models lose significant capacity below 30°F. For Colorado installations where heating is the goal, cold climate certification is essential.

Can I use a mini-split to supplement my existing heating system?

Absolutely. Adding a mini-split to supplement your furnace or boiler is one of the most cost-effective comfort upgrades for Denver homes. Common scenarios: adding cooling to a home with only a furnace, conditioning a room addition or finished basement, or boosting comfort in a master bedroom or home office that runs hot or cold. A single-zone mini-split ($5,000–$10,000) handles most supplemental applications. The mini-split and your existing system operate independently, no integration required.

Can I replace my boiler with a mini-split?

Yes, and it's one of the best applications for ductless mini-splits. Older Denver homes with boiler/radiator systems have no ductwork, making mini-splits the most practical replacement path. A 3-zone cold climate system ($13,000–$20,000) covers the main living areas with both heating and cooling, an upgrade over boilers, which only heat. The installation is non-invasive: small 3-inch wall penetrations for refrigerant lines, no demolition or ductwork construction. You also gain zone control, air filtration, and eligibility for electrification rebates.

What size mini-split do I need?

Mini-split sizing depends on room square footage, insulation quality, and Colorado's heating climate. A rule of thumb: 30 BTU per square foot for heating in average-insulation Denver homes. A 200 sq ft bedroom needs a 6,000 BTU head; a 400 sq ft living room needs a 12,000 BTU head. But altitude (5,280 ft), window exposure, and ceiling height all affect the calculation. Use our zone planner tool above for room-by-room estimates, or schedule a free in-home assessment where we do a professional load calculation for your specific home.

For Homes With No Ductwork

Ductless Mini-Split Installation

Whether you need ductless cooling for a room addition, whole-home heating and cooling, or just AC for spaces without ductwork, ductless mini split systems are the perfect choice. UniColorado offers both heat pump and cooling-only models with 12-year warranties.

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Ductless Mini-Split Installation

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UniColorado technician installing a Mitsubishi mini-split outdoor unit in Denver

Local expertise

MiniSplit Installation in Denver, CO

UniColorado has installed over 4,000 ductless mini-split systems across the Denver metro area, from Capitol Hill to Highlands Ranch. We're a Mitsubishi Diamond Contractor - the highest dealer tier - and every install is backed by a 12-year warranty option. Whether you need a single zone for a garage or a whole-home multi-zone system, we handle the full project: sizing, installation, electrical, permits, and rebate paperwork.

The smartInvestment

Why a Mini-Split is the Right Choice for Your Home

Perfect for Any Space

No ductwork needed. Ductless mini splits connect indoor and outdoor units with a small conduit, making them ideal for older homes, additions, or rooms without existing ducts. Flexible placement with wall-mounted, floor-mounted, or ceiling-cassette options.

Zoned Comfort & Whisper-Quiet Operation

Independent temperature control for each room. Cool or heat only the rooms you need, no more paying to condition empty spaces. Ultra-low noise levels with the compressor located outside and advanced fan technology inside.

Energy Efficiency & Savings

No duct losses. Traditional HVAC systems can lose significant energy through duct leaks. Ductless mini splits eliminate this issue, delivering conditioned air directly to each room. Most models use variable-speed compressors, adjusting output to maintain a consistent indoor climate.

Low Maintenance & Healthier Air

Minimal upkeep without ducts to clean. Regular maintenance is as simple as changing or washing filters, plus occasional professional servicing. Advanced filtration systems capture dust, pollen, and other allergens, helping you breathe easier.

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CompareModels

Mini-Split Models We Install

Mitsubishi Electric systems with 12-year warranties. All models include professional installation, permits, and refrigerant line sets.

Mitsubishi MSZ-GX

Standard efficiency wall-mount
Up to 18 SEER2
Heating to ~30°F
Best for cooling-focused applications
Quiet: 19 dB indoor unit

Mitsubishi MSZ-FX Hyper-Heat

Cold climate wall-mount
Up to 30+ SEER2 / 13+ HSPF2
Full heating to -13°F
Best for Colorado year-round use
3D i-see Sensor for targeted comfort

Mitsubishi MXZ Multi-Zone

2–8 indoor heads per outdoor unit
Mix wall-mount, ducted, cassette heads
Cold climate Hyper-Heat available
Best for whole-home coverage
Individual room temperature control

RealReviews

What People Wonder About MiniSplits

Common questions about ductless mini-split systems in Denver. Can't find what you're looking for? We're a phone call away.

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Google Reviews (138)

Eric F.

UniColorado had the best bid, the best heat pump system offering for my old home, listened to my requests and suggestions, and did a very clean installation of a full multizone Mitsubishi system with 2 ductless units in one day. They were professional and did excellent work. There was no cost increase for dealing with minor things - they just got it done and were nice to me the whole time. They have a really good electrician subcontractor. Definitely get a bid from Uni.

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John M.

UniColorado installed a Mitsubishi ductless heat pump in our master bedroom. They did excellent work from start to finish. They are experts in installing these units and charged a fair price. The installation was seamless and the unit works and looks great. It has significantly enhanced the comfort of that room.

Google Review

Kaleigh G.

Afshin, Aydin, and the entire UniColorado team was absolutely fantastic from start to finish. Originally we were looking for central AC and we got quotes from some HVAC companies to install a central AC system. When Afshin came in and took a look at our house, he immediately noticed that our current ducting would not allow us to get the level of cooling we’d be happy with through our hot Colorado summers. His primary concern was that we were actually satisfied with our investment long-term and after getting ductless mini-splits I can definitely say we are very happy! The entire UniColorado team is so knowledgeable and every person that walked through our door was so respectful of our house, always wearing shoe covers and cleaning up everything before heading out. I really could not recommend UniColorado enough and plan to use them in the future for any HVAC needs!

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Zachary M.

This company was great from start to finish. Aydin was an excellent point of contact and organized the work for our mini-splits seamlessly. I would highly recommend them to anyone and everyone.

Google Review

Ellen B.

We were very pleased with the installation of our mini split system. It was very easy to schedule service with UniColorado and they always provided updates on arrival times and showed up when scheduled. Work was done professionally, very knowledgeable regarding their products, and were very responsive to all of my questions/concerns. Pricing was also very competitive. Afshin the Service Manager was very personable and easy to work with, I would highly recommend this company.

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Why UniColorado?

Mini-splits solve problems ducted systems can't: additions without ductwork, rooms the main system misses, garages, basements. We've installed thousands of Mitsubishi hyper-heat units across the Denver metro, and they're our go-to recommendation for targeted heating and cooling. Each system is sized to the room, not the house, so you're not paying to condition space you don't use. We handle rebate paperwork upfront. You see the savings at signing.

2013

Our first hyper-heat install

2016

Early Lennox cold-climate adoption

2024

Bosch IDS Ultra install

2026

Latest cold-climate tech

30+

Municipalities

Master

Licensed & Certified

1000s+

Happy Homeowners

Mini-Split Certified

Technicians

100% Satisfaction

Guarantee

Up Front Pricing

No hidden fees

$5M+

Saved for homeowners in 2025

$9,250

Average savings

5,000+

Rebate applications submitted

Diamond Contractor

Why Mitsubishi for Mini-Splits

Mitsubishi Electric is the industry leader in ductless technology. They hold more patents in mini-split systems than any other manufacturer and pioneered cold climate ductless heating for markets like Colorado. As a Mitsubishi Diamond Contractor (the highest dealer tier), UniColorado has factory-trained installers, access to the full product line, and the ability to offer 12-year extended warranties on parts and compressors. Mitsubishi's Hyper-Heat H2i technology maintains full heating capacity down to -13°F using enhanced inverter compressors and vapor injection. Standard mini-splits from other brands start losing capacity at 30°F. For Denver's climate, that difference matters. We also install Bosch mini-splits for specific applications, but Mitsubishi is our primary recommendation for ductless systems based on performance, reliability, and warranty support.

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The basics

What is a MiniSplit?

A mini-split is a split system with a compact outdoor unit. It can be ductless (wall-mounted, floor-mounted, or ceiling cassette units) or ducted (air handlers connected to ductwork). Ductless mini-splits deliver conditioned air directly into specific zones with no ductwork, ideal for homes without ducts, additions, or targeted comfort. Ducted mini-splits use standard air handlers connected to ductwork, just like traditional HVAC. The 'mini' refers to the outdoor unit size, not the indoor equipment.

What is a mini-split system?

How does a mini-split differ from central air?

Ductless mini-splits deliver conditioned air directly into specific zones with no ductwork. Ducted mini-splits use short duct runs from a concealed air handler, unlike central air's whole-house duct network. Both offer zone-level control.

Is a mini-split right for me?

They're ideal for homes without ducts, additions, or spaces needing targeted comfort. If you want flexible, efficient heating and cooling, a mini-split may be a good choice.

Why are they called "mini-splits"?

They're called "mini-splits" because they have a smaller indoor unit paired with an outdoor condenser (a "split" system), making them more compact than conventional HVAC setups.

What mini-split form factors are available?

Common styles include wall-mounted, ceiling cassette, floor-mounted, and concealed duct units, allowing flexibility for different room layouts and aesthetics.

How energy-efficient are mini-splits?

They typically use inverter-driven compressors and offer high SEER and HSPF ratings, which can lower energy costs compared to traditional HVAC systems.

Perfect for any space

Is a MiniSplit the right choice for your home?

Perfect for Any Space

No Ductwork Needed - Ductless mini splits connect indoor and outdoor units with a small conduit, making them ideal for older homes, additions, or rooms without existing ducts. Flexible Placement - Indoor air handlers can be wall-mounted, floor-mounted, or ceiling-cassette style, giving you options to fit any room layout.

Zoned Comfort & Whisper-Quiet Operation

Independent Temperature Control - Cool (or heat) only the rooms you need. No more paying to condition empty spaces. Ultra-Low Noise Levels - With the compressor located outside and advanced fan technology inside, ductless mini splits help maintain a calm, comfortable atmosphere.

Energy Efficiency & Savings

No Duct Losses - Traditional HVAC systems can lose significant energy through duct leaks. Ductless mini splits eliminate this issue, delivering conditioned air directly to each room. Inverter-Driven Technology - Most models use variable-speed compressors, adjusting output to maintain a consistent indoor climate, saving energy and money in the process.

Low Maintenance & Healthier Air

Minimal Upkeep - Without ducts to clean, regular maintenance is as simple as changing or washing filters, plus occasional professional servicing. Improved Indoor Air Quality - Advanced filtration systems capture dust, pollen, and other allergens, helping you breathe easier while keeping your home fresh and comfortable.

Know your options

Types of Mini-Split Systems

Mini-splits come in several form factors, and you can mix different types on the same outdoor unit. Ductless wall-mount units are the most common and affordable. They mount high on an interior wall and deliver air directly into the room. Ceiling cassettes flush-mount into a drop ceiling for a clean, commercial look. Floor-mount units sit at baseboard height, a good fit for rooms with large windows or limited wall space. Ducted mini-splits hide the air handler in a closet or attic and connect to short duct runs. You get the efficiency of a mini-split with no visible indoor unit. Hybrid systems combine multiple types on one outdoor condenser: ducted heads in the hallway, wall-mounts in the bedrooms, a cassette in the kitchen. Not sure which combination works for your home? Our comfort advisors assess every room during a free estimate and recommend the best fit. For a deeper dive into room-by-room sizing, see our mini-split sizing guide.

What is a Ducted Mini-Split?

A ducted mini-split hides the indoor air handler in a closet, attic, or ceiling space and connects to short duct runs. You get the same inverter-driven efficiency as a ductless unit, but no visible wall-mount, only small supply grilles in the ceiling or wall. Ideal for homeowners who want the performance of a mini-split with the aesthetics of central air.

Can I Mix Different Indoor Unit Types?

Yes. Mitsubishi MXZ multi-zone outdoor units support up to 8 indoor heads, and each head can be a different type: wall-mount in bedrooms, ducted in hallways, ceiling cassette in the kitchen. This hybrid approach lets you tailor each room's solution to its layout and your aesthetic preferences.

Mitsubishi Hyper-Heat H2i cold climate mini-split overview

Colorado climate matters

Standard vs Cold Climate Mini-Splits

Standard mini-split heat pumps operate efficiently down to about 30°F. Below that, their heating capacity drops and they rely on electric backup heat, which costs 2–3x more to run. Cold climate mini-splits (like Mitsubishi Hyper-Heat) maintain full heating capacity to -13°F using enhanced inverter compressors and vapor injection technology. In Denver, where winter design temperatures hit 5°F and overnight lows regularly dip into the teens, cold climate is the right choice for any heat-pump-only installation. Standard models still make sense for cooling-only applications or homes with a gas furnace for backup. Cold climate models also qualify for larger rebates: Xcel Energy's per-ton incentives require cold climate certification. The price difference is $500–$1,000 per zone, a small premium for all-winter reliability and bigger rebate checks.

Floor-mount mini-split unit replacing a boiler system

No ductwork required

Replacing Your Boiler with a Mini-Split

Many older Denver homes, especially in Capitol Hill, Park Hill, and Wash Park, have hot water boiler systems with radiators. When the boiler ages out, homeowners face a decision: replace with another boiler ($8,000–$15,000), add ductwork for a traditional furnace+AC ($15,000–$25,000), or switch to ductless mini-splits. Mini-splits are the natural fit for boiler homes because there's no ductwork to install. A 3-zone cold climate system covers the main living areas for $13,000–$20,000, delivers both heating and cooling (boilers only heat), and qualifies for electrification incentives from Xcel Energy and the state of Colorado. Zoned comfort is an upgrade over radiators: individual temperature control room by room, quiet operation, and built-in air filtration. The conversion is straightforward. We mount indoor heads on walls, run refrigerant lines through small 3-inch penetrations, and set the outdoor condenser on a pad outside.

Cooling-only ductless mini-split AC unit

AC without the ductwork

Cooling-Only Mini-Splits

Not all mini-splits are heat pumps. Cooling-only mini-split systems provide ductless air conditioning without heating capability. These AC-only units cost $500-$1,500 less per zone than heat pump models, making them an economical choice for Denver homes that already have a furnace. Perfect for adding cooling to garages, sunrooms, bonus rooms, or server rooms where you don't need heating. Since they only cool, there's no need for a cold-climate rating: they're optimized purely for summer comfort. In Colorado's dry climate with a shorter cooling season (June-September), cooling-only models make practical sense if you're satisfied with your existing furnace.

Cooling-only vs heat pump mini-split comparison

Making the right choice

When to Choose Cooling-Only vs Heat Pump Mini-Split

Choose a cooling-only mini-split only when Xcel Energy rebates don't apply to you (e.g., ineligible area or rebates already used) and you have a functioning furnace with no need for heating. Cooling-only units cost less at list price, but heat pump models with Xcel rebates can be cheaper out-of-pocket. Choose a heat pump mini-split if you're replacing your furnace too, want year-round comfort from one system, or want to maximize rebate opportunities: heat pump models qualify for larger incentives from Xcel Energy. For Denver homes with existing gas or electric heat, adding cooling-only mini-splits to strategic zones (master bedroom, home office, bonus room) provides targeted comfort without the expense of whole-home ductwork, but only when rebates don't apply. Heat pump models make more sense for new construction, major renovations, or replacing an aging furnace and AC simultaneously.

Whole-home coverage

Can a Mini-Split Heat and Cool a Whole House?

Yes, with caveats. Multi-zone mini-splits can heat and cool an entire home if the layout allows it. Open-plan homes work best: a single 3-4 zone MXZ condenser with indoor heads in the main living areas provides coverage for most of the house. Each indoor unit controls its own zone independently, so bedrooms stay cool while the living room stays warm. Closed rooms with doors are the main challenge. A wall-mounted unit in a hallway won't effectively condition a closed bedroom at the other end. Rooms that stay closed need their own dedicated indoor head. Most Denver homeowners use a hybrid approach: mini-splits for primary living spaces (master bedroom, living area, home office) combined with an existing furnace for backup or rarely-used rooms like guest bedrooms. For true whole-home coverage in a typical 2,000 sq ft home, plan for 3-4 indoor units. Use our zone planner tool above to map out a configuration for your home, or schedule a free estimate for a professional load calculation.

What you need to know

Facts About Ductless MiniSplits

What is a Ductless MiniSplit?

A ductless minisplit is an efficient, space-saving air conditioning and heating system that doesn't require ductwork. It consists of an outdoor compressor unit and one or more indoor air handling units, connected by refrigerant lines. Ductless minisplits provide targeted cooling and heating for individual rooms or zones, making them ideal for homes without central HVAC systems or for adding comfort to specific areas.

What are MiniSplits Used for?

Mini-splits are used for providing targeted heating and cooling to specific areas or rooms within a home. They are particularly useful for homes without existing ductwork, additions, or areas that require extra temperature control. Mini-splits can also supplement existing HVAC systems to improve overall comfort and efficiency.

Can I Install a Single MiniSplit for My Bedroom?

Yes, you can install a single mini-split unit for your bedroom. One of the key advantages of mini-splits is their ability to provide zoned temperature control. By installing a dedicated unit in your bedroom, you can maintain optimal comfort levels without affecting other areas of your home.

Are All MiniSplits Ductless?

While many mini-splits are indeed ductless, the term "mini-split" itself refers to the compact size and split design of the system, with an outdoor compressor/condenser unit and one or more indoor air handling units. Some mini-split systems can actually be ducted, using short runs of ductwork to distribute air from the indoor unit to various rooms.

What are the Benefits of MiniSplits?

Mini-splits offer several benefits: energy efficiency (no duct losses), versatile installation anywhere in the home, zoned temperature control for personalized comfort, whisper-quiet operation with the compressor located outside, and built-in air filtration that removes allergens and pollutants.

What is the Best Brand for Mini Split Systems?

Mitsubishi Electric is widely regarded as the top brand for mini-split systems. They hold numerous patents in mini-split technology and have a strong reputation for rugged build quality, reliability, and performance. UniColorado is a Mitsubishi Diamond Contractor, the highest dealer tier.

MiniSplit For The Whole House?

Yes, a whole house mini-split system is possible. In practice, most homeowners install mini-split indoor units in areas such as the master bedroom and main living areas. The number of indoor units needed depends on the size of the home and specific heating and cooling requirements. Smaller homes generally require fewer indoor units compared to larger homes.

Pricing

What Does Mini-Split Installation Cost?

A single-zone mini-split starts at $5,000-$10,000 installed. Multi-zone systems (2-4 rooms) run $9,000-$20,000. Cold-climate models qualify for Xcel Energy rebates up to $2,250 per ton, which can cut $4,500-$11,250 off the total depending on system size. We apply rebates as instant discounts on your invoice. For a detailed breakdown by zone count and system type, see our full mini-split pricing guide.

AnsweringYour Questions

Frequently Asked Questions

Common questions about ductless mini-split systems in Denver. Can't find what you're looking for? We're a phone call away.

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