Posts Tagged ‘Heat Pumps’

A Question from St Joseph: What Is an Air Source Heat Pump?

Monday, December 26th, 2011

Most heating systems in St Joseph have as their main component some sort of heat generator, such as a furnace or boiler. These machines generate heat through some form of combustion, which obviously converts energy directly to heat, which is then distributed throughout the home. That’s a pretty simplified schematic explanation, but that’s more or less how most heating systems work.

Air source heat pumps are another type of heating solution; one that does not actually produce or generate any actual heat. There is no combustion. What an air source heat pump (ASHP) does instead is regulate the temperature of the home by essentially moving air around.

An air source heat pump use electricity to exchange indoor and outdoor air. Think of it like a more versatile air conditioner. In cooling mode, like an air conditioner, an ASHP will pump warm air from the inside out, using a system of refrigerant-filled coils and a compressor. By turning the ASHP to heating mode, the refrigerant flow is reversed, allowing the outdoor coils to extract heat from the outdoor air and pump it in higher concentrations to the inside.

If it seems like a simple system, that’s because it is. All the heat pump does is move heat either in or out, depending on what you need in the current season. Because this process generates no heat on its own, heat pumps can be very efficient. ASHP efficiency has been estimated at 150% to 300%, meaning that the heat energy produced is up to three times as much as the electricity used. That makes for a very efficient home heating and cooling solution.

Air source heat pumps are not necessarily right for every situation, however. In colder climates, where temperatures drop below 30 degrees Fahrenheit for stretches at a time, a heat pump will likely not be able to keep up on its own. In these situations, you may either need to supplement the ASHP with an additional heating source, or use a different system altogether. Newer so-called “cold climate” heat pumps may also be an option. Under ideal circumstances, an air source heat pump can act as a complete home heating system, as well as providing heat for hot water.

If you are looking for a simple and efficient home heating solution, look into whether an air source heat pump can work for you.

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Pros and Cons of Various Heating Systems in Gibson City

Friday, December 16th, 2011

When it comes time to install a new heating system in your Gibson City home, there are a lot of options to consider. Many people get overwhelmed when confronted with all of the furnaces, boilers and heat pumps on the market these days. So, to help you get a handle on what each has to offer and which will offer you the best benefits, here is an overview of the modern heating system market.

Furnaces

Furnaces are the core of a forced air heating system and use gas, oil or electricity to heat air which is then circulated through your home by a blower in your air handler. Furnaces are among the most fuel efficient heating systems on the market today with options available at up to 95% AFUE (meaning it uses up to 95% of the fuel consumed to produce heat). They are also inexpensive to install and while they don’t last quite as long as boilers, they are highly efficient when well cared for.

Boilers

Boilers use gas, oil or electricity to heat water or steam which is then circulated through your home into radiators or baseboard heaters. The heated water or steam releases heat into your home and heats it in turn. While not quite as energy efficient as a high efficiency furnace, boiler heat is perfect for homes with existing radiators and no room for vents and ductwork. It also has less of an impact on indoor air quality since there is no air movement and boilers tend to last a very long time when well maintained.

Heat Pumps

Heat pumps are becoming increasingly popular, especially in milder climates where it rarely gets below 40 degrees F. A heat pump uses the same technology as an air conditioner to extract heat from outside using a compressor, evaporator coils, and condenser coils with refrigerant.

It is most efficient in the spring and fall when temperatures are mild, but it uses much less energy than either a boiler or furnace and it can be used in the summer to cool your home. When properly maintained, a heat pump will last 10-20 years and save quite a bit of money, though it is recommended that you have an emergency heat source for days when the temperature outside gets below 40 degrees F.

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How to Get the Best Heat Pump: A Tip from Champaign

Wednesday, October 26th, 2011

Everybody in Champaign wants a good deal, especially when making a major purchase. People want their money’s worth. They want to feel like they got the best they could for the money they spent.

But how do you decide what the best option is, especially when choosing a product that you know little about, like a heat pump? The average homeowner does not spend a lot of time studying his heat pump or reading heat pump magazines for fun, so chances are you are not a heat pump expert. That’s understandable…but it doesn’t help you when you are trying to buy a new one and you want the best.

Fortunately, there some things you can look for to get clues about the quality of a heat pump and how well it suits your needs.

Efficiency is among the most important factors in choosing a heat pump. Because heat pumps can be used for both heating and cooling, they have two different efficiency ratings, one for each mode.

The heating efficiency for a heat pump is rated on a scale called the heating season performance factor (HSPF). This rating is actually the result of a calculation. To find the HSPF for a heat pump, the unit’s estimated heating output is divided by its energy consumption. Simply put, it’s the ratio of heat put out by the unit to the amount of power it draws. The higher the HSPF, the more efficient the heat pump is. To give a frame of reference, all new heat pumps are required to have an HSPF of at least 7.7. The most efficient units available carry an HSPF of 10.

The rating system used to convey the cooling efficiency of a heat pump is the seasonal energy efficiency ratio (SEER). This is a simple numeric value that rates how efficient the unit is. Many new heat pumps carry a SEER of at least 12, while the most efficient models rate between 14 and 18.

While efficiency is important, it is just one factor. More efficient units are also more expensive, so you will want to consider the upfront cost. The most efficient units will pay for themselves in savings relatively quickly, but the purchase price is still important. Be sure to weigh all the pros and cons when choosing a new heat pump. And if you need any help, talk to your local contractor.

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Components of a Heat Pump: A Guide from Tolono

Monday, October 24th, 2011

Because of their simply designed function – pumping heat one way or the other – heat pumps have relatively few components compared to other HVAC equipment in your Tolono home. However, these components do not work the way you might expect, if you are picturing, for example, a fan that blows heat in or out.

A heat pump operates on the same principle as an air conditioner or refrigerator, which may seem complicated at first, but it’s not. The heat pump consists of five main functional components, which are outlined below:

  1. The coils absorb heat from the surrounding air and channel it in or out of the home. There are two different types of coils in a heat pump. Condenser coils are outside the home transferring heat to and from the outside air. Evaporator coils are the reverse, transferring heat to and from the air inside the home.
  2. The coils are filled with a refrigerant, which is the medium that carries heat into or out of the home. On a cold day, for example, when the heat pump is in heating mode, the refrigerant in the condenser coils will absorb heat from the outside air, the flow inward into the evaporator coils, warming the interior of the house.
  3. The compressor pressurizes the refrigerant so that it is able to readily absorb as much heat from the air as possible. This is how your heat pump is able to gather warm air from the chilly outdoors to keep your home warm.
  4. The reversing valve is the component that changes the flow of the refrigerant when switching from heating mode to cooling mode, or vice versa.
  5. Finally, the air handler is the fan component that distributed the heat throughout the house via your home’s ductwork.

While these are the five main components, there are several smaller parts involved within and alongside each of these, as well. You need not concern yourself with them, since you won’t have occasion to interact with them. A professional will be able to identify and repair any of the components of a heat pump as needed.

In addition to these five primary components, most heat pumps also include a heater pack, which is a bunch of actual heating elements for use when the heat pump cannot operate on its own. For example, you would turn on the “Emergency Heat” setting of your heat pump after a power outage to warm the refrigerant before use. That setting is supported by the heater pack.

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How Efficient Is a Heat Pump? A Question from Tolono

Monday, October 17th, 2011

Heat pumps are actually remarkably efficient when compared to some of the home heating alternatives out there in Tolono. Especially if you’re already using electricity to heat your home, you can get generate huge savings on your monthly energy bills by switching to a heat pump system.

As their name suggests, heat pumps remove heat from the air and transfer that heat from one area to another. That means that in the winter, your heat pump will remove the heat from the air outside your home and pump that heat in to heat your home. During the summer months, that process is actually reversed, and heat pumps are able to cool your home by collecting the heat from your indoor air and pumping it outside.

Since heat pumps are actually just moving heat from one place to another rather than generating it all on their own, they don’t require much energy at all to operate. While you can buy furnaces that are as much as 97% energy efficient, they’re still using more energy than a heat pump would. The fact that the furnace is turning the vast majority of the energy that it uses into heat doesn’t mean that it still doesn’t require more energy to operate.

Just because heat pumps are more efficient than many other types of heating systems, you can’t just assume that all heat pumps are equally energy efficient. Just as different types and models of furnaces have different energy efficiency ratings, so too do the many types, sizes and models of heat pumps. Make sure you thoroughly compare your options before you settle on the right system for your home.

The energy efficiency rating of a furnace is easy to recognize, as each of them comes with a standard AFUE rating. If you’re looking to switch to heat pumps, however, it’s easy to get confused when you’re trying to compare the energy efficiency of various models.

Heat pumps actually have two separate measurements for energy efficiency. These are the seasonal energy efficiency ratio (SEER) and the heating seasonal performance factor (HSPF). Energy efficiency measurements for heat pumps reflect both the cooling and heating efficiency of the system, and so what’s best for you may vary depending on what you’re more likely to use your heat pump for. For more information, contact your local contractor.

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Furnaces vs. Heat Pumps: A Guide From Dewey

Friday, October 14th, 2011

If you’re preparing to replace your existing heating system in Dewey, you may very well be struggling with the question of whether to go with a furnace or a heat pump for all of your future home heating needs. Each of these systems have their own advantages and drawbacks, and once you’ve narrowed it down to one type or the other, you’ll still have a pretty wide variety of products to choose from.

Furnaces are still the most popular type of home heating equipment on the market. You can get furnaces that run on gas, oil or electricity, although gas furnaces are by far the most common type of furnace around these days. The latest models are extremely energy efficient, with AFUE ratings reaching into the high 90%s.

Like heat pumps, furnaces use ducts to transfer heated air throughout your home. They typically require regular maintenance once every year or two depending on the type of furnace you have. Most modern furnaces are also made to be compatible with a central air conditioning or cooling system as well.

Heat pumps, on the other hand, don’t generate the heat that they circulate throughout your house. Instead they are able to extract the heat from the air outside and pump it inside. This means that they use much less energy than even the most energy efficient furnaces.

However, heat pumps are only capable of heating your house comfortably when the outside temperature is above freezing. If you live in an area with particularly long and frigid winters, you’ll probably find that you need to supplement your heat pump with another heat source. Because of this, it actually makes little sense to use a heat pump in more extreme climates.

On the other hand, if you live in an area with relatively mild winters, heat pumps can be a great option. They provide a constant flow of warm air to all parts of your home and can also keep you house cool during hot summer months. To cool your home, heat pumps simply reverse the process they use to warm it. They take the heat out of your indoor air and pump it outside. This is a very effective home cooling method and makes heat pumps a great solution for year round comfort.

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Is Geothermal for Me? A Question From Gifford

Monday, September 12th, 2011

Geothermal heating is a great alternative to other types of home heating systems in Gifford. It is safe and efficient, costs very little to operate and makes use of a great renewable resource right below our feet. But is it right for you? Well, geothermal heating may be the right choice for many people, but there are many things to take into account before you can determine whether or not it is the best choice for your home.

The first important thing to understand when you are trying to decide whether or not to go with geothermal heating is how one of these systems actually works. A geothermal system heats your home by extracting heat from the ground and then transferring that heat into your indoor air. This happens when liquid, usually water or antifreeze, passes through a loop of pipes installed several feet below the ground.

The liquid absorbs heat from the ground, which in the winter is always warmer than the air, and carries is back up to an air handler inside your home where that heat is allowed to disperse into the air. Once the air is heated, the air handler blows the air through a system of ducts throughout your house, providing a constant stream of heated air to all areas of your home. The liquid, on the other hand, simply cycles back through the ground loop to pick up more heat and repeat the same cycle over again.

Because a geothermal heating system does not actually generate heat, it requires very little energy to operate. This means that it is both very cheap for you to run and environmentally friendly. But since installing a geothermal heating system involves putting pipes in underground, it can be pretty expensive initially. However, as long as the amount you save every month on your heating costs is enough to offset the high initial price of installation, it is worth it to put down the money up front.

Another alternative, of course, is a more traditional air source heat pump. These are much cheaper to install and nearly as cheap to run. However, air source heat pumps are not as efficient when the air temperature gets below freezing as a geothermal system can be. If you live in an area with harsh winters, the geothermal heat pump is a better option than an air source unit.

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