What we do

Air Conditioning Installation

Air Conditioner Installation Services 

AC Installation in Sterling VA

AC unit installation is a big decision. There are many factors to consider, including managing upfront costs, the AC unit that will provide the best value for long, and the new central air system’s correct size. 

We leverage our expertise and knowledge of the existing technology to help you make the right choice for your family. We provide air conditioning services and AC unit installation services in Northern Virginia to residential properties, and over the years, we have discovered it’s vital to take the following into account. 

First, when it’s time to replace your central air unit, it’s time.  


While proper care and maintenance can extend your AC unit’s working efficiency and lifespan, it will eventually need to be replaced. Here are some telltales that it’s time for a replacement.

#1: Frequent service calls 

If you call your AC repairman regularly – over three times per year – it means your unit is starting to break down. In such a state, your care and maintenance regimen won’t matter; eventually, you’ll need a new AC unit installed. 

So you might as well go ahead and spare yourself some stress and hassle associated with frequent repair by having a new unit installed today. 

#2: Consistently expensive repairs 

If your repairs are getting more expensive, it’s wise to invest in a new central air system. Otherwise, you might end up paying more in repair costs than the price of a new AC unit. 

#3: Old AC unit 

Some AC units have a design life of 15 to 20 years, but most units have a service life of about 10 years. If your AC is older than this, it’s time to employ air conditioning replacement services. Licensed technicians will inspect the unit and inform you about its working conditions, informing your replacement decision. 

#4: Old coolant 

The federal government has ordered that older AC units be replaced when they run out of coolant. It’s illegal to use the “old” coolant anymore. 

Thus, if your AC uses the old-kind-of coolant and the said coolant is running low, it’s time to get a new central air system. 

Additional telltales include: 

  • The AC no longer keep your home comfortable
  • The AC is not energy-efficient & there’s a need to increase energy savings 


If any of the discussed signs apply to your unit, it’s time to consider a replacement. Modern, energy-efficient options are designed to last longer, save energy, and reduce the probability of frequent breakdowns and expensive repairs. 

Whether you want to replace your AC unit or install a new one altogether, there will be a question of the best central air system for your needs and budget. 

When we visit your home, we’ll first have a detailed conversation about your AC needs. That is:

  • How often you’re likely to use the air conditioning 
  • How well it should be in cooling your home 
  • Your home’s square footage 
  • Energy efficiency in AC and its benefits 
  • Central Ac installed cost 
  • AC unit replacement cost
  • And more… 

After that, we’ll recommend AC units produced by reputable manufacturers. After years in the business – installing new air conditioning – we know who manufacturers quality units, and we’ll ensure you purchase only the best. 

Next up, you’ll choose your unit, and once it’s delivered, we’ll install everything according to the manufacturer’s specifications. We’ll also give you tips on retaining your warranty, scheduling necessary maintenance, and testing the unit functionality before we leave!

Here’s a sneak peek into the entire process.

Types of Air Conditioner Systems

Air Conditioning installation in Sterling VA

When selecting a new air conditioners system, you’re choosing between the following types: 

#1: Two-stage air conditioning systems

Two-stage AC systems are designed to operate in a low or high setting to control the house temperature. When the unit is set to high, the compressor distributes refrigerant at a fast speed. High settings allow the conditioner to remove heat and humidity from your home efficiently.

When the conditioner is set low, the compressor operates at 50-70% capacity. The low setting is designed to reduce energy consumption, and as such, reduce your utility bills. 

#2: Variable-speed air conditioner

Unlike the two-stage ac system, a variable-speed conditioner can operate at any capacity. It’s designed to offer a balanced distribution of cold air in every area of your house. 

The variable-speed unit runs at slow speeds for more hours per day to help lower your electricity bills. The slow speeds also enable the unit to operate for longer periods without a major breakdown. 

#3: Single-stage air conditioning system

On its end, a single-stage AC is designed to operate at full capacity throughout the cooling cycle. This unit is highly inefficient as it consumes more electricity to run. Besides, its critical components are likely to be damaged as the unit gets older. Think of compressor, condenser coil, evaporator coils, and condenser blower motor. 

A variable-speed AC is an ideal choice – especially when considering energy-efficiency. However, it is a tad expensive – so take your budget into account. But whatever you do, it’s best to select an AC that boats the following features:

  • Variable speed motors 
  • Produce little to no noise 
  • Environmental friendly 
  • High SEER (Seasonal Energy Efficiency Ratio) ratings 
  • Superior moisture removal – a proper Sensible Heat Ratio rating (SHR)
  • Lifetime Unit Replacement Guarantee protection plans for the compressor and heat exchanger 


The figures above are rough estimates to give you an idea of the BTU rating required to keep your home comfortable. However, BTU calculations consider other variables, such as local area, weight height, and window sizes. 

To receive a precise and accurate estimate on a new air conditioner system, book an air conditioning replacement service or AC unit installation appointment with us. 


A new central air unit costs from $2,000 to $4,000 or above. The cost is dependent on:

  • Type of system 
  • Ductwork maintenance or replacement 
  • The Seasonal Energy Efficiency Ratio (SEER) Rating
  • And more. 

For instance, a homeowner will pay an average of $4,000 to install a 3-ton central air unit. At the same time, a homeowner will incur an average of $4,500 to configure a 4-ton AC system. 

When you take the SEER rating into account, it will cost you an average of $4000 to $9000 to install an air conditioning system with a SEER rating of 16, and $3500 to $6000to configure an AC with a SEER rating of 14. 


AC unit installation is no easy task. It requires multiple steps that range from permit processing to tough electrical work. 

By hiring experts to install or replace your air conditioning system for you, you’ll avoid common problems, such as: 

  • Selecting the wrong unit for your home
  • Blockages and leaks 
  • Incorrect refrigerant levels 
  • Improper cooling loads
  • And more. 

Note, the AC unit installation process varies with the system and circumstance. For example, when replacing an older model, you’ll first remove the old equipment before installing the new device in its place. 

But, if you’re getting a new unit, you may need to add certain features, such as adding ductwork if needed or installing a pad in case of a split air conditioning system. 

Generally, however, the installation process involves the following: 

  • Sealing the ductwork
  • Adjusting airflow 
  • Adding refrigerant to the manufacturer’s specification 


When it’s time to install a new central air unit, our skilled technicians at RS Gregory Heating and Air are ready to help Virginia residents. We help you understand your AC options and walk you through your selection journey to keep your home cool. Once your AC of choice is delivered, we’ll install everything according to the manufacturer’s specifications within a day. We’ll also give you tips on retaining your warranty, scheduling regular maintenance, and testing the unit functionality before we leave! Give us a call today or fill out our online contact form. We pride ourselves on our customer satisfaction in Northern Virginia.

Air Conditioning Repair


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Heat Pumps

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Contact Us Today for All of Your AC Installation Needs!

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