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Ductless AC Installation in Houston, TX - Dependable Cooling for Homes Without Ductwork
Not every Houston home has ductwork, and not every home needs it. Converted garages, older homes in the Heights and Montrose, room additions, and properties where running ducts is not realistic all need a cooling solution that works without tearing through walls and ceilings. 75 Degree AC designs and installs ductless air conditioning systems across Houston for single rooms and full homes. 75 Degree AC designs the layout, installs the system, and confirms every zone is cooling before the job closes.
Experienced Ductless Air Conditioning Installers Serving Houston Since 2016
Ductless AC installation is not the same job as replacing a central system. There are no ducts to connect to, which means every decision, where the indoor units mount, how the refrigerant lines route through the walls, where the outdoor unit sits, is made from scratch based on the home’s layout. That is the kind of work 75 Degree AC does daily across Houston.
Our licensed contractors design ductless layouts for homes without existing ductwork, converted garages, room additions, and properties where adding ducts would mean tearing into finished walls and ceilings. Whether the project is a single-zone install or a full-home multi-zone system, the approach is the same: measure the space, size the equipment, and install it right.
Every system is charged, started, and tested in each zone before the job closes. We verify airflow, temperature drop, and refrigerant pressure on site so the system is confirmed working before we leave.
Ductless AC Systems We Install Across Houston
Ductless systems solve cooling problems that central AC cannot always reach. Our technicians install ductless air conditioning for these common situations across Houston homes and converted spaces.
Homes Built Without Ductwork
Many older Houston homes were built before central AC became standard, and adding ductwork after the fact means cutting into finished walls, ceilings, and closets. A ductless system delivers the same cooling without any of that construction. We mount indoor units in the rooms that need cooling and connect them to one outdoor unit through a small wall opening.
Replacing Window AC Units
Window units are loud, block natural light, and leave gaps in security. Ductless air conditioning replaces them with a wall-mounted unit that cools quieter, runs more efficiently, and keeps your windows free. Our contractors remove the old units and install the ductless system the same day.
Cooling a New Addition
A new bedroom, sunroom, or enclosed patio often sits outside the reach of the existing central system. Extending ductwork to the new space costs more and may overload the current system. We install a dedicated ductless unit for the addition with its own thermostat and independent cooling control.
Garage or Workshop Conversion
Garages and workshops turned into living spaces rarely have ductwork routed to them. A ductless system cools the space without connecting to the main system. Our team installs the indoor unit, runs the refrigerant lines through the wall, and places the outdoor unit nearby for a clean, self-contained setup.
Full-Home Multi-Zone System
Some homes need ductless cooling in every room. We design and install multi-zone systems with up to five indoor units connected to a single outdoor condenser. Each room gets its own temperature control, and the system runs only the zones that need cooling at any given time.
Signs Your Home Is a Good Fit for Ductless Air Conditioning
Not every home needs a ductless system, but some are built for it. Our licensed contractors evaluate homes for ductless AC installation in Houston regularly, and these are the most common signs a ductless system is the right fit.
- No existing ductwork in the home
- Window units cooling individual rooms
- Garage or workshop converted to living space
- New addition not connected to central system
- Hot spots the central AC cannot reach
- Older home where adding ducts is not realistic
Why 75 Degree AC for Ductless AC Installation in Houston
75 Degree AC handles ductless AC installation in Houston from design to startup with no subcontractors and no handoffs.
Full-Home Ductless Design
We design single-zone and multi-zone ductless layouts based on square footage, room count, insulation, and how the home is used. Every system is sized correctly so the compressor is not overworked and each room reaches the set temperature.
Clean Wall & Line Routing
The refrigerant line set, drain line, and wiring run through a single small opening in the exterior wall. Our contractors route the lines along corners and trim, cover them with a matching line hide, and keep the exterior clean. The wall opening is sealed and weatherproofed after installation.
Ductless vs. Central Guidance
Some homes are better served by central AC, even when they currently have no ducts. We walk through both options and explain where ductless saves money and where central makes more sense. The recommendation is based on the home, not the sale.
Same-Day Install Available
Many single-zone ductless installations are completed the same day. Multi-zone systems typically take one to two days depending on the number of indoor units and the complexity of the line routing. Scheduling is confirmed when you book.
Book Your Ductless AC Installation
Ready to replace window units or cool a home that has no ducts? Call 75 Degree AC at (713) 598-2737 and get a free estimate from a licensed contractor who installs ductless systems every week.
Home Walkthrough & Zone Layout
We walk through the home with you, identify every room that needs cooling, check wall space for indoor unit placement, and evaluate the best outdoor unit location. The number of zones and the system layout are determined during this visit.
System Design & Pricing
Based on the walkthrough, we select the right system size, the correct number of indoor units, and the refrigerant line routing. The full installation price is presented in writing before any work begins, covering equipment, labor, lines, electrical, and permits.
Indoor Unit Mounting & Wiring
Each indoor unit is mounted on the wall at the correct height and position for airflow. Electrical wiring is run from the breaker panel to the outdoor unit and from the outdoor unit to each indoor head. All connections are secured and tested before moving forward.
Refrigerant Lines & Outdoor Setup
The line set, drain, and communication wire run through a single core-drilled hole in the exterior wall. Lines are routed along the outside of the home using a line hide for a clean look. The outdoor condenser is placed on a level pad and connected to all indoor units.
System Startup & Room-by-Room Test
We vacuum the line set, release the factory refrigerant charge, and power on the system. Each indoor unit is tested individually for airflow, temperature drop, and thermostat response. The installation is complete only after every zone is confirmed cooling.
Business Hours
Monday
7 AM–9 PM
Tuesday
7 AM–9 PM
Wednesday
7 AM–9 PM
Thursday
7 AM–9 PM
Friday
7 AM–9 PM
Saturday
8 AM–8 PM
Sunday
8 AM–5 PM
How Ductless Air Conditioning Works Without Ducts
A ductless system moves heat out of a room the same way central AC does, just without the ductwork in between. The indoor wall unit pulls warm air across an evaporator coil filled with cold refrigerant. The refrigerant absorbs that heat, travels through a copper line set to the outdoor unit, and releases the heat outside through the condenser coil. The cooled refrigerant cycles back inside and the process repeats.
Because there are no ducts involved, the cooled air goes directly into the room instead of traveling through feet of sheet metal or flex duct. That direct delivery means less energy lost in transit and more consistent temperatures in the space. Multi-zone systems use one outdoor unit connected to several indoor units, and each zone can be set to a different temperature or turned off entirely when the room is not in use.
Proudly Serving the Entire City of Houston TX
75 Degree AC provides HVAC services across Houston TX, supporting residential and light commercial properties throughout the city. Our service coverage reflects how HVAC demand actually works in Houston, from central neighborhoods to outer city districts. Customers rely on us for consistent service standards, clear communication, and dependable system support city-wide.
- Westwood
- University Place
- Meyerland
- Eastwood
- Harrisburg / Manchester
- Spring Branch (East Houston)
- Clear Lake (Houston city portion)
Start Your Ductless AC Installation in Houston Today
Window units and portable ACs were never meant to be permanent. Call our team at (713) 598-2737 to walk through your home, design the right ductless layout, and lock in a flat-rate installation price.
About Houston, TX
Houston, TX is home to thousands of older properties in neighborhoods like the Heights, Montrose, East End, and Third Ward that were built decades before central air conditioning became standard. These homes often have no ductwork at all, and retrofitting ducts into finished walls and ceilings can be expensive and destructive to original construction. Ductless air conditioning gives these homeowners a way to cool every room without major renovation.
The city’s continued growth has also created a steady demand for garage conversions, workshop buildouts, and room additions that sit outside the reach of existing HVAC systems. From backyard studios to enclosed patios, ductless cooling solves the problem without extending or overloading the central system. 75 Degree AC installs ductless systems across the Houston metro for both historic homes and new construction that needs flexible, zone-based cooling.
Frequently Asked Questions FAQ's
What Is the Difference Between Ductless AC and a Mini-Split System?
Ductless AC and mini-split refer to the same type of system. Both use an outdoor condenser connected to one or more indoor wall units through refrigerant lines instead of ductwork. The terms are used interchangeably in the HVAC industry. Our contractors install both single-zone and multi-zone configurations.
Can a Ductless System Cool an Entire House in Houston?
A properly designed multi-zone ductless system can cool an entire home. We install systems with up to five indoor units connected to one outdoor condenser, and each room gets independent temperature control. Our team sizes the system based on square footage, layout, and insulation levels.
Is It Better to Go Ductless or Add Ductwork to a Home?
It depends on the home. Ductless systems work well for homes without existing ducts, small footprints, and room additions. Central AC may make more sense for larger homes with open floor plans. We evaluate both options during the walkthrough and recommend the one that fits the home best.
How Long Does a Ductless AC Installation Take in Houston?
A single-zone ductless installation is typically completed in one day. Multi-zone systems with three to five indoor units usually take one to two days depending on line routing and electrical work. We confirm the timeline before starting and keeps the schedule on track.
Do Ductless Systems Use More or Less Energy Than Central AC?
Ductless systems are generally more energy efficient because cooled air goes directly into the room without traveling through ductwork. Central AC systems can lose a significant amount of cooling through duct leaks and long runs. Zone control also helps because unused rooms can be turned off completely.
What Does a Ductless Installation Look Like on the Outside of the House?
The outdoor condenser sits on a level pad near the exterior wall. Refrigerant lines run from the condenser to each indoor unit through a small hole in the wall, covered by a line hide that matches the home exterior. We route lines along corners and trim to keep the look clean.