When it’s time to replace a central air conditioning system in a house, a homeowner will face a number of different options. One of them is to remove both the air conditioner and the heater and put in a heat pump instead. Since heaters and air conditioners are usually installed at the same time in a new home, they’ll probably be ready for a replacement around the same time. A heat pump allows a home to have its heating and cooling needs for all around the year taken care of with a single installation.
How does a heat pump HVAC system work?
- A heat pump HVAC system heats and cools by transferring heat rather than creating it.
- In cooling mode, it pulls heat from inside your home and releases it outdoors.
- In heating mode, it reverses the process and extracts heat from the outdoor air, moving it indoors.
- A component called a reversing valve switches between heating and cooling modes.
- This heat transfer process allows one system to provide year round comfort efficiently.
How a heat pump works
People are sometimes confused about how a heat pump works. They may think that it’s two different systems put together in a single cabinet, which is similar to the configuration of many HVAC systems, with a furnace and AC using the same blower fan.
But a heat pump uses the same set of components and the same process to work in both its heating mode and air conditioning mode. Not much changes about how a heat pump operates when the thermostat adjusts from one mode to the other. To better understand this versatility, take a look at why heat pumps beat ACs.
At the most basic level, a heat pump is an air conditioner that can change the direction it moves heat. (Technically, an air conditioner is a type of heat pump, since it pumps heat from one place to another. But in the residential HVAC world, a heat pump is a system that can both heat and cool.) An air conditioner circulates refrigerant between two sets of coils. The refrigerant starts in the compressor, where it’s put under pressure to turn it into a hot gas. It then moves to an outdoor coil, where the hot refrigerant condenses, releases heat to the outside, and cools down. The refrigerant moves to the indoor evaporator unit, cooling down further as it is allowed to expand and lose pressure. The cold refrigerant moves through a coil where it evaporates, removing heat from the air and cooling it. The refrigerant then travels back to the compressor to start the process over again.
Now, to switch into a heating mode, all that needs to happen is for the refrigerant to move in the opposite direction. The refrigerant leaves the compressor, and a valve sends it to the indoor coil first. There it releases heat, and later goes to the outdoor coil where it absorbs heat. Presto! The two coils have swapped jobs and the heat pump is now providing heat for the house. If the system isn’t switching smoothly, it may be time to replace your aging heat pump.
How a Heat Pump Heats and Cools Your Home Efficiently
A heat pump offers a great convenience for a home. But it can also help save energy in heating mode compared to other types of heaters, particularly electric heaters. Because heat pumps move heat, rather than create it with electrical resistance, they consme less power. They’re also safer than using natural gas for heating.
If you would like to find out more about installation a heat pump in Fenton, MI, our team of HVAC experts is glad to help you find the best model and then have it put in place.
Frequently Asked Questions
Question: How does a heat pump cool a house?
Answer: In cooling mode, a heat pump works like an air conditioner. It pulls heat from inside your home using refrigerant, then moves that heat outside through a compressor and coils. This process cools the indoor air and keeps your home comfortable during warm weather.
Question: How does a heat pump heat a home in winter?
Answer: A heat pump can reverse its refrigerant flow to absorb heat from the outdoor air, even when it’s cold. That heat is then transferred inside and released into your home. This allows the heat pump to provide efficient heating without generating heat directly.
Question: What makes a heat pump different from a furnace or air conditioner?
Answer: Unlike a furnace, which creates heat, or an air conditioner, which only cools, a heat pump does both. It uses a reversing valve to switch between heating and cooling by moving heat in or out of your home as needed.
Question: Can a heat pump work in cold climates?
Answer: Yes, modern heat pumps are designed to work efficiently in cold climates. They can extract heat from the outside air even in freezing temperatures, although a backup heat source may be used in extremely low conditions.
Question: Is a heat pump energy efficient?
Answer: Heat pumps are very energy efficient because they transfer heat rather than generate it. They often use less electricity than electric resistance heaters and can provide up to three times more heat energy than the energy they consume.
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