Switching from a Gas Wall Furnace or Floor Furnace to a Ductless Mini Split in Kyle, Texas

Updated September 2026 · ATX Mini Split King, Austin and Central Texas

Many older homes in Kyle still rely on gas wall furnaces or floor furnaces for heat. These systems are simple and reliable, but they have real limits. If you are considering a change to a ductless mini split, this page covers what to expect, what it costs, and when it makes sense. ATX Mini Split King is an independent HVAC and electrical contractor serving Kyle and Central Texas.

Flat pricing, everything included

Those are materials and labor together, wired to code by a TDLR licensed contractor. Anything non standard gets quoted first, before a single tool comes out of the truck: a very long line set, an electrical panel that needs work, a difficult mount, a roof or masonry penetration, disposal of the old equipment. You hear the number before we start, not after.

What a Gas Wall Furnace or Floor Furnace Is and How It Works

A gas wall furnace is a self contained heating unit mounted into an exterior wall or between studs. It pulls in air from the room, heats it over a gas flame, and pushes it back out with a small fan. A floor furnace works the same way but sits in a cutout in the floor, often in a hallway or central area. Both burn natural gas or propane and vent combustion gases directly outside through a pipe. They do not use ductwork. They heat the room they are in, and sometimes a little heat spills into adjacent spaces through open doorways.

In Kyle, these furnaces are common in homes built from the 1950s through the 1980s, especially in neighborhoods like Plum Creek, Hays Hills, and older sections near the downtown area. Many were installed as the primary heat source in small houses, converted garages, or additions. They are simple machines with few moving parts, which is why many have lasted decades. But they only provide heat. There is no air conditioning, no filtration, and no way to control temperatures in separate rooms without adding more units.

Honest Pros of a Gas Wall Furnace or Floor Furnace

The biggest advantage is reliability. These furnaces have few components to fail. A basic thermocouple, a gas valve, and a fan. If natural gas is available and cheap in your area, the operating cost can be lower than electric resistance heat. They heat a room quickly because the flame is directly in the space. There is no ductwork to leak or lose heat. The units are compact and do not take up much floor space. A floor furnace is completely flush with the floor, so it does not block furniture placement.

For someone who only needs to heat one or two rooms and does not want air conditioning, a gas wall or floor furnace can be a perfectly fine solution. In Kyle's mild winters, a single unit may be enough to keep the whole house comfortable if it is small and well insulated. They are also inexpensive to buy and install compared to a central forced air system. Many homeowners keep them because they work and there is no pressing reason to change. If the unit is still in good shape and gas is affordable, repairing it can be the practical choice.

Honest Cons and Limits of a Gas Wall Furnace or Floor Furnace

The main drawback is that they do not cool. Central Texas summers are long and hot. A gas furnace cannot help with that. You either need a separate air conditioning system or you sweat. Even in winter, the heat is uneven. The room with the furnace gets warm, but bedrooms down the hall stay cold. Because there is no ductwork, you cannot move heat from one room to another. You also have no way to filter the air or control humidity.

Safety is a real concern. Gas furnaces produce carbon monoxide. If the vent gets blocked or the heat exchanger cracks, CO can enter your home. Floor furnaces have an open grate that can burn children or pets. Dust and debris can fall into the burner area. These units also take up wall or floor space that could be used for furniture or storage. Over time, the efficiency drops as burners get dirty and seals degrade. Gas prices can also rise, making them more expensive to run than a heat pump.

Honest Signs That Your Gas Wall Furnace or Floor Furnace Is Failing

Look for visible rust or corrosion on the burner, heat exchanger, or vent pipe. If the pilot light keeps going out or the flame is yellow instead of blue, the burner may be dirty or the gas mixture is off. A smell of gas or a sooty buildup around the unit means incomplete combustion. If the furnace makes popping, rumbling, or screeching noises, parts are wearing out. The fan may become noisy or fail entirely.

Check the age. Many of these units have a service life of 20 to 30 years. If yours is older than that and needs repairs, it may be time to consider replacement. A heat exchanger crack is a serious safety issue. You may notice a persistent smell or see rust flakes inside the burner compartment. If the unit no longer heats the room adequately, even after cleaning, the internal passages could be blocked. Any of these signs means the system is near the end of its life and replacement should be considered.

What a Ductless Mini Split Replacement Involves for This System Type

When you replace a gas wall or floor furnace with a ductless mini split, the crew removes the old unit completely. For a wall furnace, the opening in the wall is patched with drywall and finished to match the existing surface. For a floor furnace, the floor cutout is filled with wood or plywood and covered with matching flooring. The gas line is capped off safely. Then the mini split indoor head is mounted on a wall in a location you choose, typically in the same room or a central spot.

The line set and condensate drain run from the indoor head to the outdoor unit. In many Kyle homes, the outdoor unit sits on a concrete pad or wall bracket on the side of the house. The electrician on the crew runs a dedicated circuit from the panel to the outdoor unit. Most jobs are completed in one day. You decide where the indoor head goes and where the outdoor unit sits. The flat price for a single zone system is $1,500, for two zones $2,500, and for three zones $3,500. That includes materials and labor. If the line set run is long, a panel upgrade is needed, or the mounting is tricky, we quote the extra cost before work starts.

When NOT to Switch: Honest Advice on Keeping Your Gas Furnace

If your gas furnace is less than 15 years old, works well, and you are satisfied with only heating, repairing it is usually the right call. Gas wall and floor furnaces are cheap to fix. A simple thermocouple or gas valve replacement costs far less than a mini split. If natural gas is very inexpensive in your area and you do not want air conditioning, there is no reason to change. Also, if your home already has ductwork for a central system, a ducted heat pump may be a better fit than multiple mini split heads.

If you are renting the property or plan to move soon, replacing a working gas furnace may not be worth the investment. The new owner may prefer gas heat. And if you only need heat for a few weeks a year, a space heater may suffice. Finally, if your house has a historic or unusual layout where a mini split indoor head would be visually intrusive, or if you cannot get a line set to the outdoor unit without major construction, staying with what you have might be the practical choice. We are honest about these situations and will tell you when a mini split is not the right answer.

Questions people actually ask

How much does it cost to replace a gas wall furnace with a mini split in Kyle?

For a single zone ductless mini split, the flat price is $1,500 including materials and labor. Two zones are $2,500 and three zones are $3,500. If the line set run is longer than standard, a panel upgrade is needed, or mounting requires special equipment, we quote the extra cost before any work begins. ATX Mini Split King provides a written estimate with no surprises.

How long does the installation take?

Most replacements are completed in one day. The crew removes the old gas furnace, patches the wall or floor opening, mounts the indoor head, runs the line set and condensate drain to the outdoor unit, and connects the electrical circuit. If there are complications like a long line set or a difficult mounting surface, the job may take a little longer. We schedule accordingly.

Will a ductless mini split heat as well as my gas furnace?

In Kyle's mild winters, a mini split heat pump provides plenty of heat. It works differently. It moves heat from outside to inside rather than burning gas. It will keep the room comfortable, but it does not produce the same intense immediate heat a gas flame does. The air from a mini split is gentler and more consistent. For most people, the comfort is better, especially combined with cooling.

Do I need a separate air conditioner if I get a mini split?

No. A ductless mini split is a heat pump. It provides both heating and cooling in one system. In summer it removes heat from inside and dumps it outside. In winter it reverses and brings heat in. This means you no longer need a separate air conditioner or window unit. It is a complete year round solution for one room or multiple rooms.

What if my gas furnace is in a hard to reach spot like a closet or under a window?

We handle awkward mounting situations. The indoor head can be placed on an interior wall or an exterior wall. If the location requires a longer line set or special mounting brackets, we quote the additional cost upfront. We work to code and ensure the installation is safe and functional. Give us a call at 512-297-7493 to discuss your specific layout.

Keep reading

Every replacement guide we have written is listed on the replacement guide hub. Next door to this page: replacing a gas wall furnace or floor furnace with a ductless mini split in killeen, replacing a gas pack all in one heating and cooling unit with a ductless mini split in austin. Pricing, service area and the quote form all live on the ATX Mini Split King home page, and the Austin mini split cost guide covers what the rest of the market charges.