Types of Furnaces


Gas furnaces are the most commonly installed heaters in Louisville homes, and typically the most economical to operate, as they use natural gas as an energy source.


An electric furnace is another popular choice for Louisville homeowners. Electric furnace installations are less expensive and can typically last up to 15 years. 



A heat pump is a very popular choice for Louisville homeowners. It looks just like your central air conditioner; however, it cools AND heats. It provides air conditioning in the summer, then reverses its operation to provide heating during the winter. 

An all-in-one HVAC system, heat pumps are powered by electricity and have zero reliance on common home fuels such as natural gas or propane, making them environmentally friendly.

Available as a year-round whole-house heating and cooling solution, and as a ductless mini-split unit, heat pumps can heat and cool an individual room, multiple rooms, or an entire home. 



HVAC units with inverter technology are becoming more and more popular as a result of their energy savings, efficiency, eco-friendly characteristics, and quiet operation.

Unlike conventional single-stage and two-stage systems that stop and start repeatedly throughout the day, an inverter HVAC unit keeps your home at the desired temperature all day, consistently and quietly.

How It Works

A standard central AC unit runs at 100% at full speed until the desired temperature is reached, then it shuts off. It is similar to accelerating up to a red light then suddenly braking. It works, but it’s not the most effective.

In contrast, an inverter system slows down as your home begins to reach the desired temperature. This is similar to your car coasting to the red light before coming to a gentler stop. It is easier on the car and your unit. 

With inverter technology, the system provides as much cooling as needed, making it more efficient without losing its effectiveness.

Mini split systems have utilized inverter technology successfully for years. Now, more traditional systems are offering inverter technology for whole-home solutions. 


  • Increased efficiency
  • Quieter Operation
  • More powerful
  • More comfortable since there are no fluctuations in temperature
  • Increased savings on your energy bill
  • Less wear-n-tear for a longer life span

If you are interested in more uniform heating throughout your home without the up and down temperature swings of traditional systems, then an inverter-driven system may be for you.



Ductless systems are ideal for room add-ons, like a sunroom, 2nd floor bedroom, garage, or for older homes being renovated.  These systems do not require traditional ducts, making them easy to install and more efficient. (Link to ductless mini split page)



Geothermal heating and cooling systems use the energy found just beneath the earth’s surface, where the temperature remains consistent between 50° and 60°.  Utilizing a series of pipes installed underground, this system taps into the sun’s energy to heat or cool your home.

Even though the up-front cost may be twice the investment of a traditional unit, geothermal is an investment that will pay for itself over time. (Link to Geothermal page)

Which Is Right for You

Today’s furnaces offer many options to enhance your comfort beyond the basics. Furnaces come in different capacities, or sizes, measured in Btuh (British thermal units per hour). 

To determine the right furnace for you, we will assess your home, including square footage, number and quality of windows, insulation and more. Improperly sized furnaces can result in loss of comfort, loss of efficiency and even reduce the lifetime of the furnace.

Cost of Your New Furnace

The cost of a furnace is driven by several variables including its energy efficiency rating – the higher the efficiency, the greater the average cost. Keep in mind a higher efficiency unit that costs more upfront may save money down the road on your monthly utility bills and may continue to do so over the life of the furnace. 

Other variables include retrofitting the new furnace, venting, and accessories. Also, keep in mind most furnaces are vital to your central air conditioning system, so it could be time to replace your air conditioner, as well. To get an accurate estimate for your home, contact us. 502-244-9999

Featured Product

AMANA 2 stage 16 SEER

The AMANA Heat Pump with Inverter Technology 20 SEER is a high efficiency unit that provides both heating and cooling. 

When this unit is paired with an Amana® brand gas furnace, it uses unique technology to make automatic adjustments, reducing the amount of energy used to cool your home. As a result, heat pumps are more efficient.  

Allgeier Air offers quality heating equipment to Louisville homeowners. We only sell HVAC units from manufacturers who have a proven track record of after sales service support.  

We service all makes and models. When you need heating or furnace repair, furnace installation or replacement, TEXT OR CALL, 502-244-9999.

We look forward to serving you and becoming your preferred HVAC contractor.

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