Gas Wall Furnace to Ductless Mini Split in Pflugerville

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

Many homes in Pflugerville still use a gas wall furnace or floor furnace for heating. These units are simple and reliable, but they do not cool. If you are thinking about switching to a ductless mini split for both heat and air conditioning, this page explains what that involves, what the real tradeoffs are, and when it makes sense to keep what you have.

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 Actually Is

A gas wall furnace is a self contained heating unit that mounts inside a wall, usually between studs. It burns natural gas or propane to heat a metal heat exchanger, then a fan blows air across that heat exchanger and out into the room. A floor furnace works the same way but is installed in a cutout in the floor, often in a hallway or central area. Both types draw combustion air from inside the home and vent exhaust through a flue pipe that goes up through the roof or out a side wall. They have no ductwork and heat only the room they are in, though some units have a small grille that lets a little warm air into adjacent spaces.

These furnaces were very common in older Pflugerville homes, especially those built before the 1980s. You see them in smaller houses, in additions, and in converted garages or sunrooms where running ductwork would have been difficult. They are simple machines with few moving parts, which is one reason they stayed in use for so long. But they only provide heat. In Central Texas, where summers are long and hot, that means you still need a separate cooling system, usually window units or a central air conditioner.

Honest Pros of a Gas Wall or Floor Furnace

The biggest real advantage is that these furnaces are cheap to run during Pflugerville's short mild winters. Natural gas is generally less expensive per unit of heat than electric resistance heat, so your heating bills stay low. They also heat a room very quickly because the burner is right there. There is no ductwork to lose heat, so the warmth feels immediate and direct. The equipment itself is inexpensive to buy and simple to repair. A homeowner who is handy can often replace a thermocouple or gas valve without calling a technician.

Another honest pro is that they take up no floor space. A wall furnace sits flush in the wall, and a floor furnace is flush in the floor. That matters in a small room or a tight hallway. They also do not require electricity to run the burner during a power outage if the unit has a standing pilot. That can be a comfort during the occasional winter ice storm when the lights go out. For many older Pflugerville homes, these units have been working reliably for decades with just basic maintenance.

Honest Cons and Limits of Gas Wall and Floor Furnaces

The most obvious limit is that they provide no cooling. In Pflugerville, where summer temperatures regularly hit the high 90s and humidity is high, you need air conditioning. That means you either run window units, which are noisy and block windows, or you install a separate central AC system. Either way you are paying for two systems. These furnaces also have safety concerns. The heat exchanger can crack over time, which can send carbon monoxide into the living space. The open flame is a burn hazard, especially for children or pets. And the units are loud when the fan kicks on.

They also heat unevenly. The room with the unit gets warm, but adjacent rooms stay cold unless doors are left open. In a Pflugerville house with a floor furnace in a central hallway, the bedrooms at the ends of the house can be chilly all winter. The units are also inefficient compared to modern heat pumps. While natural gas is cheap now, prices can rise. And because these furnaces vent combustion gases outside, they are constantly pulling conditioned indoor air out of the house, which wastes energy. Finally, they take up usable wall or floor area. You cannot put furniture in front of a wall furnace, and a floor furnace grille limits where you can put a rug.

Signs Your Gas Furnace Is Nearing the End of Its Life

The most serious sign is a cracked heat exchanger. You might notice a sharp smell like burning metal, yellow or flickering flames instead of blue, or soot around the burner area. A cracked heat exchanger can leak carbon monoxide, so if you have headaches, nausea, or dizziness when the furnace runs, that is a red flag. Other signs include the pilot light going out frequently, the unit cycling on and off too quickly, or the fan making grinding or rattling noises. If the unit is more than 20 years old, it is likely approaching the end of its safe service life.

You may also notice that the furnace does not heat as well as it used to. The room takes longer to warm up, or the air coming out feels less hot. If your gas bills have been creeping up even though you are using the furnace the same amount, that points to declining efficiency. Rust on the cabinet or around the flue is another sign that moisture is getting in, which can accelerate corrosion. In Pflugerville, where humidity is high, floor furnaces in particular can rust from below if the crawlspace is damp. If you see any of these signs, it is worth having a licensed contractor inspect the unit before the next heating season.

What a Ductless Mini Split Replacement Involves for This System

When ATX Mini Split King replaces a gas wall or floor furnace with a ductless mini split, the crew first disconnects the gas line and caps it safely. The old furnace is removed from the wall or floor opening. That opening is then patched with drywall or subflooring and finished to match the surrounding surface. The crew runs a line set, which is a pair of copper refrigerant lines, and a condensate drain line from the new indoor head unit to the outdoor condenser. The line set is typically run through a small chase on the exterior wall or through the attic and down an exterior wall. The condensate line must slope downward to drain properly, often tied into a laundry sink or a floor drain.

Electrical work includes running a dedicated circuit from the panel to the outdoor unit and sometimes to the indoor head if it needs a power source. In older Pflugerville homes, the electrical panel may need an upgrade if there is no spare breaker slot or if the service is too small. That is a non standard condition quoted before work starts. The crew typically finishes the installation in one day. The customer has to decide where to mount the indoor head for best airflow, where the outdoor unit goes (usually on a concrete pad or wall bracket), and whether any drywall or flooring repair around the old opening is acceptable. Flat pricing for a standard install is $1,500 for one indoor head, $2,500 for two, and $3,500 for three, all materials and labor included. Anything non standard, such as a long line set over 50 feet, a panel upgrade, or awkward mounting on a steep roof, is quoted before work begins.

When Not to Switch: Keep the Gas Furnace or Wait

If your gas wall or floor furnace is still in good working order and you already have a separate cooling system that works fine, there is no urgent reason to replace it. The furnace is cheap to run for the few months of heating you need in Pflugerville. Switching to a mini split would mean spending money now for a benefit you may not fully realize for years. Also, if your home already has ductwork for a central air conditioner, it may be more practical to install a heat pump that uses those existing ducts rather than putting in multiple indoor heads.

Another case where switching is not the best call is if you need whole house cooling and heating from a single system. A single mini split head can only condition the room it is in. To cover a three bedroom house you would need multiple heads, which increases cost. If the house is large or has an open floor plan, a ducted system may be a better fit. And if your current furnace is simply in need of a minor repair, like a new thermocouple or a blower motor, that repair is usually far cheaper than a full replacement. In some cases it makes sense to wait until the end of the cooling season to do the switch, so you do not lose your air conditioner during the hottest months. ATX Mini Split King can help you weigh these options honestly.

Questions people actually ask

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

For a standard installation, ATX Mini Split King charges $1,500 for one indoor head, $2,500 for two, and $3,500 for three. That includes all materials and labor. If your home needs a long line set, an electrical panel upgrade, or difficult mounting, those are quoted before work starts. No hidden fees.

Will a ductless mini split also cool my home?

Yes. A ductless mini split is a heat pump that provides both heating and cooling. In Pflugerville's hot summers it will keep your room comfortable. The same system reverses to provide heat in winter. It is a single solution for both seasons, unlike a gas furnace that only heats.

Do I need a permit for this replacement in Pflugerville?

Yes. ATX Mini Split King is a TDLR licensed contractor and pulls the required permits for the electrical and mechanical work. The permit ensures the installation meets local code. We handle that process as part of the job. You do not need to do anything.

How loud is a mini split compared to my old wall furnace?

Mini splits are much quieter. The indoor head produces a low hum, similar to a refrigerator, not the loud roar of a gas furnace fan. The outdoor unit makes some compressor noise, but it is outside. Overall, a mini split is noticeably more peaceful than a wall or floor furnace.

What happens to the gas line after the furnace is removed?

The gas line is disconnected from the furnace and capped off at a safe point, usually near the meter or at a shutoff valve. The line is no longer live. If you want the gas line completely removed, that is a separate job. For most replacements, capping is sufficient and meets code.

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 kyle, replacing a gas wall furnace or floor furnace with a ductless mini split in killeen. 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.