Single-Stage, Two-Stage, or Variable-Stage?
Click here to Apply for a Job
The Lowdown on High-Efficiency HVAC Systems
Is a High-Efficiency HVAC System in Augusta Really Better?
02/14/2025
Don’t Let Your Energy Bills Go to the Dogs! Upgrade Your AC or Heat Pump in Richmond County
Today’s homeowner lives in a high-efficiency world, where everything is tagged or touted as more efficient. We often equate efficiency with value, sustainability, and savings.
However, when it comes to an HVAC system, it’s important to know where the value lies, how sustainable or durable the equipment is, and where you’re actually saving money.
Below is a comprehensive guide to understanding high-efficiency HVAC systems. Read on to learn why they’re a great investment when you decide to move forward with an HVAC installation.
What Do We Mean By ‘High-Efficiency’?
Whether you’re buying a high-end HVAC system or a toaster for your pop-tarts, the concept of high efficiency is the same across the board. So what does it mean?
High efficiency means a machine, system, or technology uses less energy, fuel, or resources to perform the same job as a standard version.
It reduces waste and improves performance. High-efficiency products can save money on utility bills, last longer, and have a more negligible environmental impact. They often work better while using fewer resources.
Here are some characteristics that separate high-efficiency technology from the myriad of equipment available in the marketplace.
- Uses less electricity, gas, or water to operate
- Produces less heat, noise, or emissions
- Converts more energy for intended purpose with minimal waste
- Often includes advanced technology like smart sensors or improved materials
- Meets or exceeds industry efficiency standards and ratings
- Has lower AC maintenance or heating maintenance costs
A high-efficiency appliance or system does more with less. It may cost more upfront, but it saves money over time. Homeowners choose high-efficiency products to lower energy use, reduce wear and tear, and improve performance. More efficient products also help protect the environment by decreasing pollution and conserving resources like water and electricity.
How does that apply to your next heating and cooling system?
What Differentiates a High-Efficiency HVAC from Any Other System?
To the average homeowner, all HVAC systems look the same. A furnace is a furnace. And that thing that cools your home–even if it’s a mini-split or heat pump–is an air conditioner. If you are considering new equipment, you may feel more confused after the side-by-side comparison than before. But that’s because you don’t know what to look for.
A high-efficiency HVAC system uses advanced technology, better materials, and more innovative designs. It provides the same (or more) comfort but saves energy, lowers your bills, and is better for the environment. Here are some key advantages of a high-efficiency HVAC:
1. Advanced Technology for Energy Savings
High-efficiency HVAC systems use components like variable-speed compressors and motors. These parts adjust their speed to match your home's heating or cooling needs. Instead of constantly turning on and off, they run steadily at lower speeds, which uses less energy. Smart thermostats are also part of the equation. They learn your habits and adjust settings automatically for maximum comfort and savings.
2. Better Heat Transfer and Insulation
High-efficiency units use improved heat exchangers, refrigerants, and insulation. This tech trifecta transfers heat more effectively and reduces energy loss. For example, a high-efficiency furnace captures more heat from burned fuel, wasting less in the exhaust. Air conditioners with advanced refrigerants cool air faster and use less energy to do so.
3. Lower Environmental Impact
High-efficiency systems are designed to use less energy, which lowers your carbon footprint. Some systems also use eco-friendly refrigerants that don’t harm the ozone layer. By using energy more effectively, these units reduce greenhouse gas emissions and protect the planet while keeping your home comfortable.
4. Quieter Operation and More Consistent Comfort
High-efficiency HVAC systems often run more quietly than standard units. Variable-speed motors and compressors reduce loud startup and shutdown noises. They maintain a more even temperature by running continuously at lower speeds. There are no more hot and cold spots caused. Your home feels more comfortable during winter and summer.
5. Noticeable Savings and Durability
While high-efficiency HVAC systems may cost more upfront, they save money in the long run through lower energy bills and fewer AC or heating repairs. They’re built with higher-quality parts and materials that last longer than standard models. Many manufacturers also offer extended warranties.
5 Ratings that Take the Guesswork Out of High-Efficiency
Even after our explanation above, you may find yourself trying to figure out high-efficiency in your head. The good news is that there are actual ratings that help you measure efficiency. You can apply these ratings to an HVAC system to determine its efficiency. Here are the details:
| SEER |
Stands for: Seasonal Energy Efficiency Ratio
|
| AFUE |
Stands for: Annual Fuel Utilization Efficiency
|
| HSPF |
Stands for Heating Seasonal Performance Factor
|
| EER |
Stands for: Energy Efficiency Ratio
|
| Energy Star Certification |
|
Watch for These Three High-Efficiency System Types
Once you dive into high-efficiency heating and cooling products, you’ll discover that you have options. You can compare models and choose the one that provides ultimate home comfort with less energy and cost. Let’s look at three HVAC profiles to give you a better idea of how to choose.
Single-Stage HVAC System
What Is It?
A single-stage HVAC operates at full capacity whenever it turns on. Unlike variable-speed or two-stage systems, there is only one power setting—fully on or entirely off. However, modern versions of this HVAC equipment still use low energy because it has high-efficiency compressors, heat exchangers, and smart thermostats.
How Does It Work?
It turns on when your home’s temperature deviates from the set temperature on the thermostat. Until it reaches the desired temperature, a single-stage system runs at full capacity. Although it only operates at one speed, high-efficiency models use improved fans, refrigerants, and heat exchangers.
Why Is It Efficient?
Newer single-stage systems are more efficient than older models because they use advanced components that reduce energy waste. They often have a higher SEER or AFUE rating than standard units. They convert more energy into heating or cooling instead of losing it through heat loss.
Is It Right for My Home in Augusta?
A single-stage HVAC is an excellent choice if you live in a moderate climate where extreme temperatures are rare. Since it always runs at full power, it works best in well-insulated homes that prevent frequent heat loss or gain. It is also ideal if you want a more affordable, high-efficiency option.
Two-Stage HVAC System
What Is It?
A two-stage high-efficiency HVAC system operates at two different power levels: low and high. Unlike a single-stage system that runs at full blast all the time, a two-stage system can switch between a lower setting for mild conditions and a higher setting for extreme temperatures.
How Does It Work?
A two-stage starts in low-power mode, which is usually enough to maintain the desired temperature. When the outdoor temperature becomes more extreme, the system automatically shifts to high-power mode for extra heating or cooling.
Why Is It Efficient?
Two-stage units are more efficient than single-stage units because they don’t always run at full capacity. They use less electricity or fuel while still keeping your home comfortable. They also reduce temperature swings, which means the system doesn’t have to work as hard to maintain a consistent indoor climate.
Is It Right for My Home in Richmond County?
Two-stage AC installation is ideal if you live in an area with hot summers and cold winters. It’s also an excellent option for better humidity control–a big problem in Augusta. Running at a lower speed allows the system to effectively remove moisture from the air.
Variable Speed High-Efficiency HVAC System
What Is It?
A variable-speed, high-efficiency HVAC system is the most advanced type of heating and cooling system in Augusta. Unlike single-stage or two-stage systems, it can adjust its power output in small increments, running anywhere from 1% to 100% capacity based on real-time temperature needs.
How Does It Work?
The system continuously monitors your home's temperature and humidity levels and adjusts its speed accordingly. Instead of frequently turning on and off, it operates at the power level needed to maintain a steady indoor climate. The system increases or decreases output in tiny increments.
Why Is It Efficient?
Variable-speed systems are the most energy-efficient HVAC systems because they rarely run at full power. Instead of cycling on and off, which wastes energy, they operate at low speeds for longer periods, reducing wear and tear on the system and extending its lifespan.
Under What Conditions Is It Right for My Home?
It’s perfect if you want the best energy savings, ultimate comfort, and the quietest operation possible. It’s especially beneficial in regions with extreme temperature swings, where it makes precise adjustments to maintain steady indoor conditions. Homeowners with larger homes, multi-level spaces, or high humidity concerns will also benefit from its ability to provide even temperatures and improved indoor air quality.
Breakdown of HVAC Stage Systems
Here’s a quick side-by-side chart to help you compare the differences between a single-stage, two-stage, and variable-speed HVAC system:
| Feature | Single-Stage HVAC | Two-Stage HVAC | Variable-Speed HVAC |
|---|---|---|---|
| Operation | Runs at full capacity or off. | Runs at two levels: low and high. | Adjusts to any level between 1% and 100%. |
| Energy Efficiency | Moderate: Uses more energy due to frequent cycles. | Higher: Operates at low power most of the time. | Highest: Runs at lower speeds for long periods. |
| SEER Rating (Cooling Efficiency) | 14–16 SEER (high efficiency) | 16–18 SEER (higher efficiency) | 18+ SEER (maximum efficiency) |
| AFUE Rating (Heating Efficiency) | 80–90% AFUE (moderate efficiency) | 90–95% AFUE (higher efficiency) | 95–98% AFUE (highest efficiency) |
| Temperature Control | Basic; noticeable swings. | Improved; fewer temperature fluctuations. | Precise, consistent, and steady temperature. |
| Humidity Control | Minimal: Removes less moisture. | Better: Longer low-power operation dehumidifies. | Excellent: Continuous operation optimizes control. |
| Noise Level | Loud: Frequent starts and stops. | Quieter: Often runs at low speed. | Quietest: Smooth, low-speed operation. |
| Best for | Small homes or mild climates. | Moderate climates or homeowners wanting comfort. | Extreme climates, large homes, or those who want maximum comfort. |
| Lifespan | Shorter: Frequent cycling and increased wear. | Longer: Fewer cycles reduced wear | Longest: Smooth operation and minimal system strain |
| Cost | $ | $$ | $$$ |
Bottom Line:
What's Better, Lower Upfront Cost or Comfort with More Overall Value in the Long Run?
Saving money upfront always makes you feel like you got a great deal on your HVAC. It’s why homeowners often make a knee-jerk decision to buy cheaper products. However, you must live with your decision after the sheen wears off.
For this reason, purchasing something as vital to your lifestyle and property value as a heating and cooling system should be a long game, not a quick decision. A low-efficiency or cheaper unit will cost less upfront.
However, over time, it typically costs more money in repairs, energy bills, and premature heating or AC replacements. It runs at full power, turning on and off often, which wastes energy and wears out parts.
High-efficiency heaters and AC systems cost more initially but save energy and last longer. They run at lower speeds to keep temperatures steady and control humidity. Over time, they lower utility bills and make your home more comfortable.
They are also quieter and better for the environment because they use less energy. While the upfront cost is higher, the savings and comfort you gain over the years often make it worth the investment.
Stop Barking Up the Wrong Tree! Choose an HVAC System that Saves Energy
At Bailey's Comfort Services, we aim to find innovative, sustainable ways to help you save money on heating and cooling. That’s why we recommend installing a high-efficiency HVAC system in your home. We’ll explain the differences between single, two-stage, and variable speed systems. You can count on us to help you find the right product and install it to your specifications. With over 20 years of experience with ac repair, maintenance, and replacement, there’s no better team in Richmond County, GA, or Greenville County, SC.