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.

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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 realisticOlder home where adding ducts is not realistic

Why 75 Degree AC for Your AC Heat Pump Installation in Houston

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.

How We Install Your New Heat Pump System

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.

System Design & Pricing

Based on the walkthrough, we select the right system size, the correct number of indoor units, and the refrigerant line routing.

Indoor Unit Mounting & Wiring

Each indoor unit is mounted on the wall at the correct height and position for airflow.

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.

System Startup & Room-by-Room Test

We vacuum the line set, release the factory refrigerant charge, and power on the system.

Our Recent Projects in Houston

Business Hours

Monday 7:00 AM – 9:00 PM

Tuesday 7:00 AM – 9:00 PM

Wednesday 7:00 AM – 9:00 PM

Thursday 7:00 AM – 9:00 PM

Friday 7:00 AM – 9:00 PM

Saturday 8:00 AM – 8:00 PM

Sunday 8:00 AM – 5:00 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.

What Parts Of Houston Does 75 Degree AC Serve?

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.

Downtown

East Downtown (EaDo)

Westwood

Midtown

Spring Branch (Central, TX)

University Place

Montrose

Gulfton

Meyerland

The Heights

Westbury

Eastwood

River Oaks

Memorial

Harrisburg / Manchester

Third Ward

Lazybrook / Timbergrove

Spring Branch (East Houston)

South Belt / Ellington

Trinity / Houston Gardens

Clear Lake (Houston City Portion)

Richmond

Katy, TX

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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.

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Faq

Frequently Asked Questions

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.