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People who face the need to get a new HVAC system often have to choose between a conventional AC and a heat pump. These systems have a slight difference if you consider them to cool your premise. However, when it comes to their heating side, the primary principle of their work varies. This guide is made to answer the critical questions about heat pumps and air conditioners and help you arrive at the best choice for your household's needs. We cover everything from the operation principles of each system to their pros & cons and the average spending on installation. Besides, the post dwells on the factors to consider before purchasing a new cooling or heating system. Read on to make an informed decision about a suitable HVAC unit for your home.
Table of contents
3. The pros & cons of heat pumps
4. What is air conditioning (AC)?
5. How does an air conditioner cool?
6. Pros & cons of air conditioners
7. The differences between a heat pump and an air conditioner
10. Why hire a pro to install a heating or cooling system in your house?
If you think about replacing your current HVAC unit, the chances are that you’ve already heard many conflicting opinions about the most common types of solutions. Should you install a heat pump or air conditioner? Although these systems have a lot in common, they are not the same and offer different advantages.
A system that works perfectly in a particular situation may be completely inefficient in other circumstances, so you should make the right choice based on your specific needs. Let's dive into the theory of what a heat pump is and how it differs from an air conditioner. To understand which system would fit you best, you should learn as much as possible about its key features, advantages, and weak points. This is what this guide sheds light on.
Let's first discuss a heat pump because if you want to cool your home, the chances are that the first thing that pops into your mind is air conditioning. Although heat pumps can cool, they can also heat the premises. These units can transfer warm air from the outside to heat a building, but they can also do the opposite to cool it down.
If you have some basic understanding of how an AC system works, you already know a lot about the heat pumps' operational principles because they have many in common. However, if you have no idea how these systems work, don't worry because we will explain that further in the text.
There are different kinds of heat pumps, but they have the same underlying principle of work, which is heat transfer. Such a system is different from other heating solutions because it moves heat between the two areas instead of generating heat by burning fuel. As a result, a heat pump needs less energy, which is also one of the advantages of a heat pump over other heating solutions.
According to thermodynamics, heat moves from areas with a high temperature to areas with lower temperatures. A heat pump does the opposite, therefore being able to heat your home. The most common source of heat is air. In this case, a heat pump moves heat from the air outside your home through coils filled with a refrigerant. Such a system has a lot in common with what you can see in the back of your fridge.
Now let’s take a closer look at the elements of a heat pump system. A typical air-source heat pump consists of two parts: an outdoor unit and an indoor unit. The former looks similar to an outdoor unit of a split air conditioner, and the latter helps distribute air and heat through your home or office.
In the heating mode, pumps use the air outside your home as a source of heat energy, even when it’s cold outside. To make it possible, the coil of the outside unit works as an evaporator while the indoor coil works as a condenser.
A cool liquid refrigerant absorbs heat energy outdoors and turns it into a cold gas. After this, the cold gas becomes hot because of the pressure applied to it, and then it is cooled down in the indoor unit, passing its heat to the air. The gas turns into warm liquid, and low pressure makes it move back to the outdoor unit, where it cools down, so the cycle repeats.
Let’s start with the advantages of heat pumps. You may want to consider them when choosing between a heat pump and air conditioning and searching for the best heating solution.
Air conditioning systems remove heat and moisture from an inside space, cooling it down. An air conditioner moves air through the system and blows cold air. This becomes possible by cooling down fluid through evaporation of the refrigerant. An AC turns gas into a liquid and back, making such systems similar to heat pumps.
The key elements of an air conditioner are:
The refrigerant arrives at the compressor at low pressure as a gas. The compressor applies pressure to turn this gas into a liquid. As a result, the temperature rises, and the liquid moves away from the compressor as a hot gas. This gas reaches the condenser, turning into liquid again and then moving through the evaporator. Its pressure drops, and it starts to evaporate. The cycle repeats when the refrigerant gets back to the compressor.
During this process, the air conditioner removes heat from the air and uses it to cool gas in the evaporator. After this, the air conditioner blows cool air back into your home. As you can see, the main difference between a heat pump and air conditioning is that an AC doesn’t do the opposite.
If you’re looking for a heating system, you will have to purchase it separately. However, if you only need something to feel comfortable in summer, an air conditioner offers some advantages.
To replace the existing HVAC unit, you need to choose a system that will be efficient in particular circumstances, fulfilling your specific needs, whether air conditioning only or cooling. As you can see, ACs and heat pumps offer different advantages.
Central air conditioning systems and heat pumps involve transferring heat from one area to another. For instance, an air conditioner transfers heat from the inside of your home to the outside. The main difference between these two systems is that heat pumps can also move the air, and therefore heat, in a reverse direction. While some models of air conditioners have heat strips in the air handler unit, most air conditioning systems aren’t capable of heating.
While the cost of an average heat pump system is only about 5% higher than that of an air conditioner, you should keep in mind that you will also pay more for installation when choosing a heat pump. Given that heating units are used all year round, they also have a shorter lifespan than air conditioning systems. As a result, you may also pay more for their upkeep.
If you’re going to install a new HVAC unit or replace the existing one, we recommend you request an estimated cost. However, you should keep in mind that the final price will depend on many factors, including the climate in your area and specific parameters of your home or office.
To choose whether you should have a heat pump or an air conditioner, you should consider the climate in your area. An air conditioner can only cool the air inside the room, so a heat pump is a more flexible solution if you want to keep it warm when it’s cold outside.
On the other hand, if you live in an area where the temperature drops below 40 degrees, a heat pump won’t be an efficient heating option. Such a system needs to work hard to maintain the necessary temperature. It will use more energy than other heating systems, increasing your utility bills.
The thing is that when the temperature drops below 40, the system transferring heat becomes insufficient to warm the inner space. In this case, pumps usually switch to an emergency mode and start to heat the air with heat strips that consume a lot more electricity.
In other words, even though an air conditioner won’t heat your home in winter, if the climate is too cold, a heat pump also won’t be a good solution. In this case, you may opt for an air conditioning system to cool your place in summer and purchase a separate heating unit for the winter. For example, you may consider purchasing a boiler or furnace.
However, if you live in an area with a moderate climate, both an air conditioner and a heat pump will demonstrate almost the same cooling performance. An air conditioner won't help you heat your place, while a heat pump can fulfill this purpose unless it's too cold outside. An AC, however, is a less costly solution.
Both air conditioning systems and heat pumps require proper installation with meticulous attention to detail. It's a labor-intensive process that should be performed by contractors with extensive expertise, which is a reason why installation costs can be quite high. Therefore, it's crucial to find a certified installer who can prove their expertise while not demanding an exorbitant price for their services.
We already mentioned possible noise as one of the disadvantages of air conditioners. Those who opt for a heat pump may also experience the same issue if their system isn't correctly installed. Besides, your HVAC unit's safety and effective operation also depend on the contractor's workmanship.
To choose the best contractor, you may need to analyze multiple offers, familiarize yourself with the market prices, and make dozens of phone calls. Fortunately, contractor-matching platforms like HomeQuote offer a simpler solution. With us, you just need to provide details about your project to let the platform match you with contractors who have the necessary experience and good reviews from clients.
No matter what kind of HVAC system you choose, on HomeQuote, you can find a contractor who has good experience in installing this exact kind of system and whose rates fit your budget. Leave your request now to avail yourself of lucrative offers from local experts.
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