ACI Northwest Blog: Posts Tagged ‘Heating’

What Is a Downflow vs. an Upflow Furnace?

Wednesday, November 30th, 2011

When you go looking to buy a furnace in Sandpoint, you may well be surprised by how many different elements go into making a good purchasing decision. There are simply so many different kinds of furnaces available now and they each are more appropriate for certain situations. That means that finding the one that’s right for you is less about finding the one best unit than it is about finding the one that is the best match for your particular circumstances.

This applies to the type of fuel the furnace uses, its energy efficiency, and whether it’s an upflow furnace or a downflow furnace. Energy efficiency and fuel types are probably things that you’re more or less familiar with. But what are we talking about when we classify a furnace as an upflow or downflow model?

Well, it’s pretty much what it sounds like. These terms refer to the direction the air flows as it is taken in and heated by the furnace. So in an upflow furnace, the cool air is taken in at the bottom, warmed, and then expelled at the top. A downflow furnace, on the other hand, takes in cool air at the top and expels heated air at the bottom.

While this is all very exciting, it may still not be obvious what impact this will have on your decision about what type of furnace to buy. The main thing you’ll have to think about when you’re deciding between an upflow and a downflow furnace is where the furnace will be placed in your house.

An upflow furnace is generally installed in the basement so that the heated air is directed towards the parts of the house you want cooled and so that the furnace can be appropriately vented outside of the house. On the other hand, a downflow furnace would be installed in your attic for the same reasons.

So where you want to have the furnace installed is probably the biggest thing to take into account as you’re comparing these two types of equipment. Of course, whether you pick an upflow or a downflow furnace, you’ll still have to select the appropriate AFUE, size and fuel source to best meet your needs. But making the choice between upflow and downflow can at least make it easier to narrow down your options.

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The Beauty of Zone Heating: A Tip from Furnace Contractor

Monday, November 28th, 2011

While it might not technically be a necessity, there are a lot of reasons why you might want to look into having a zone heating system installed in your Cheney home. Whether you’ve been using the same home heating system for a long time or are looking to have a new one installed, there’s never a bad time to have a zone heating system put in.

Most people think that the only thing that affects their home heating and cooling bills is the energy efficiency of their furnace or heat pump. However, that’s simply not always the case. Certainly, the more efficient your furnace or heat pump is, the lower your energy bills will be. But that doesn’t mean they’re as low as they could possibly be.

After all, if you don’t have a zone control system installed, you’re paying to heat your entire house every time you turn on the heat. Depending on the size of your house, that could mean you’re heating anywhere from two to 10 rooms or more that are unoccupied at the time. In fact, you could be paying to heat an entire empty wing of your home. And while you’ll pay less than you would if your heating system was less efficient, you’re still paying more than you need to.

With a zone control system, you can heat your home much more efficiently because you can control which areas of the house get the heat and which ones don’t. You can set multiple different temperatures for the different zones of your home, which allows you to keep the occupied areas warm while not forcing you to waste energy to heat unoccupied spaces.

Aside from the economic benefits of only heating the areas of your home that you need, zone control systems also can put an end to some of those contentious thermostat wars that go on in so many households. If the members of your household can never agree on what a comfortable temperature is, they can simply each set their own temperature for their own area of the house.

That way, everyone is happy and no one has to suffer uncomfortably. After all, you paid a lot for your state of the art home heating system. It’s only fitting that you should be able to get the most possible out of it.

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How a Furnace Works: Some Pointers from Bayview

Monday, November 14th, 2011

Do you know how your furnace works? Believe it or not, lots of Bayview homeowners probably can’t explain the operation of furnace. It probably isn’t at the top of your “to do” list. It’s only important to know that once you set your thermostat to a desired temperature, the furnace comes on and warms the house.

The most common furnace is fueled by natural gas but there are other examples of heating equipment such as boilers, electric baseboard, or geothermal. But let’s look at how a gas furnace works since natural gas is found in most U.S. households. Gas furnaces use natural gas or propane to provide energy used for generating heat.

When the temperature in your home falls below the level set on the thermostat, an electric pilot light automatically ignites to heat a burner inside the furnace. This burner uses gas to generate heat within a combustion chamber inside the furnace. After the furnace senses that the thermostat has triggered the flame and that it is properly lit, the actual spark (or ignitor) is turned off.

Simultaneously, a motor in the furnace pulls in air from an exchange or return, which could be a grill in the floor, ceiling, or wall of a house. That air flows through ducts into the plenum of the furnace. The plenum is on the opposite side of the heat exchanger from the burner.

Gas will typically burn for at least two minutes before the blower starts to disperse heat throughout your home. This extra time gives the air an adequate period of time to warm up and also so that cold air won’t be pushed through the vents into the rooms in your house at the start. After either the preset time (roughly two minutes) or pre-established temperature is reached, the blower’s motor is turned on and it blows air over the heat exchanger, which usually consists of a series of copper tubes or pipes. When a fan blows air onto the heat exchanger, the air is heated. This heated air is then blown through a series of ducts to heat your home via vents in the floor, walls or ceiling. Exhaust fumes from the combustion process exit the furnace through a gas flue or chimney.

Just as the heat in your home turns on when a certain temperature is reached, it also turns off after the rooms are warm enough, thanks to your thermostat. The thermostat again senses the temperature in the room. When the room warms up to the temperature set by you at the thermostat, the gas valve is switched off, stopping the flow of gas. After the gas is turned off, the blower motor will still run for a few minutes, allowing the heat exchanger to cool off a bit. In some furnaces, the blower motor never shuts off, but operates at low speed to keep air circulating throughout your home.

In a nutshell, your thermostat is the brain in your heating system and your furnace is the brawn, doing most of the work.

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What Size Furnace is Right for My Home? A Question from Pinehurst

Friday, November 11th, 2011

When it comes to your Pinehurst home’s heating equipment, the right size is very important. If your furnace is sized correctly, you will enjoy a high level of indoor comfort. However, an incorrectly sized furnace may result in many cold spots in your home, an overworked furnace, or higher utility bills.

An undersized furnace will turn off and on frequently, which is called short cycling. Short cycling can lead to moisture in the system, causing less efficiency and damage to equipment from accumulating moisture in the heating system. The constant cycling adds to wear and tear on equipment, too. An oversized furnace may not be able to keep up with the demand for heat during the coldest days. The furnace may be constantly running and unable to keep up – adding to higher utility costs. So size really does matter when it comes to selecting the right heating equipment for your home.

But a big furnace does not mean it is right-sized. Have you ever seen a “five-way” gravity furnace? It was manufactured in the mid-1900’s and took up a lot of room – as much as half of a basement – while being extremely inefficient. The key here is efficiency. A furnace that works right is sized to the space it is heating, which does not include attics, crawlspaces, or uninsulated rooms (porches, mud rooms, etc.).

A furnace must make efficient use of its Btu’s, which is abbreviated for British thermal unit. Btu is used to measure a furnace size. Furnaces are often rated by input Btu, which is the amount of energy consumed when running. The output Btu may be different based on the system. And output Btu is the best way to select a furnace, since this is the actual heating capacity.

When sizing a furnace, the first thing to do is to determine the inside space that will be heated. If you are looking to heat your home, you can measure the square footage of each room (multiply width by length). The rooms should include bathrooms and hallways but exclude attics and crawlspaces. Add up the totals and match up the Btu output to the total square footage. If you aren’t sure of your calculations, call a qualified heating and cooling contractor.

There are many factors that go into heating a home and today’s energy efficient furnaces give homeowners many more choices. Whatever furnace you choose to purchase, make sure you do your homework and hire a qualified professional HVAC contractor to determine the best size furnace for your home.

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Troubleshooting Thermostat Issues: Is it the Thermostat or Something Else?

Friday, November 4th, 2011

If the temperature in your Cheney home is too hot or cold, what is the first thing you check? Probably the thermostat. If you are a homeowner, you probably have played around with the setting on a thermostat, much to the chagrin of other occupants who don’t share your same comfort level. And if you try and adjust a thermostat at work – well forget about it. Most companies now have locking thermostats or “false” ones that don’t actually connect to the heating and cooling system.

So if you have a temperature problem, is it really the thermostat that causes it? Maybe yes and maybe no. One physical characteristic to check is the location of the thermostat. If it is in a drafty hallway or near a heat source, it only reads the temperature for that area and other parts of the building are neglected. You will often find more than one thermostat in a home that is tied into more than one furnace or air conditioner.

The older more popular round thermostats are manually controlled and do not adjust to any conditions in the home. They simply control the heating and cooling functions based on a human turning a dial. It’s as simple as that. So if you use this method to adjust the temperatures, blame yourself and not the thermostat. You might want to consider installing a digital, programmable thermostat.

With that in mind, let’s look at some typical ways to troubleshoot a thermostat.

  • Check the anticipator, which is a small metal tab on the front of the printed scale. Give it a light push in either direction. It may be stuck.
  • Clean the interior of the thermostat housing and clean the contacts (small metal plates)
  • Check loose wires or wires that may be corroded.
  • Read the thermostat manual (if not available, look online) for other tips such as ensuring there is voltage to the terminals.

If you have checked everything and the thermostat seems to be in working order, look for other things within the heating & cooling system. These include blocked or restricted registers and vents, leaks or cracks in ductwork, and dirty air handling filters.

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How Much Will a High Efficiency Furnace Save Me? A Question from Kootenai

Friday, October 14th, 2011

The furnaces you can buy these days in Kootenai are all much more energy efficient than those available even 10 years ago. However, that doesn’t mean that all of the current models are created equal. There is still a pretty big variation when it comes to energy efficiency and when it comes to price, so you need to really know what you’re looking for if you want to get the best deal out there.

The first thing you should understand when you’re trying to pick out a furnace is how energy efficiency for this type of equipment it measured. All furnaces come with an annual fuel utilization efficiency (AFUE) rating that reflects just exactly how energy efficient they are.

Any furnace you buy today will have an AFUE of at least 80%, but it’s possible to purchase models with AFUEs of 97% or more. Of course, energy efficiency is generally a good thing, but there are some other things to consider when you’re trying to decide just how energy efficient you need your new furnace to be.

What this calculation really comes down to is how much you’ll be able to save monthly and annually with a higher efficiency furnace. While your heating bills will certainly be lower the higher the furnace’s efficiency is, you will also pay more up front for the highest efficiency models.

This higher purchase price may be worth it, however, if you live in an area with particularly harsh winters. If your heating load is very high and you’ll be using your furnace a lot, your monthly savings will make up for the higher initial price of the high efficiency furnace in a reasonable amount of time.

However, if you live in an area with relatively mild winters and you won’t be demanding a whole lot of your furnace, then the amount you’ll save each month with the highest efficiency models really won’t add up to much.

Keep in mind that a furnace with an 80% AFUE is still quite efficient and will almost certainly save you a considerable amount monthly when compared to the unit you’re currently using.

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Common Furnace Problems: A Tip From Harrison

Friday, October 7th, 2011

When it comes to the furnace in your Harrison home, you simply want it to work all of the time. But just like any other piece of equipment, your furnace will have problems from time to time. A few of these are relatively simple to fix on your own, but for the most part you’ll need to call in someone to take care of the repairs for you.

However, before you can do that, you’ll need to recognize that a problem exists at all. And the earlier you notice the warning signs, the better off you’ll be. It’s always better to get a furnace problem taken care of right away than to wait until your furnace stops working completely.

It’s also good to remember that quite often the problems you’re having with your furnace are really originating with your thermostat. This is usually welcome news, as thermostats are much cheaper and easier to repair and replace than many other parts of your furnace. In fact, even if your furnace isn’t working at all, it may only be the result of a faulty thermostat.

Another problem you may start to notice is that one part of your house is being warmed more than another part. When this happens, it can be a sign that there is something wrong with the furnace, but it may also be that the pressure in your duct system is not balanced properly. A simple rebalancing of this system can have your house heating evenly again in no time.

You may also realize that your furnace seems to be cycling on and off too often. When a furnace is working properly, it will come on for a considerable period of time and then shut off until the temperature in the house drops below the desired level. However, some problems can cause your furnace to complete many short cycles rather than fewer short ones.

If this is happening to your furnace, there are several possible causes. Something might be wrong with the blower on the furnace or the thermostat might not be feeding the furnace the correct information. Another possibility is that your furnace’s air filter is dirty or clogged.

While there are sometimes simple and straightforward solutions to these types of common furnace problems, it’s best to call in a professional to have them take a look if you’re not sure where to start searching for a problem. In most cases you’ll need them to come out and make the necessary repairs anyway.

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How Effective is Geothermal Heating? A Question From Cocolalla

Wednesday, October 5th, 2011

Geothermal heating is an efficient way to use the Earth’s natural resources to heat a building’s interior in Cocolalla. But is it an effective way? Of course.

Consider the cost of geothermal heating. Once you get past the initial installation costs of a geothermal heating system, which are higher than other conventional heating systems, its operating costs are much lower because of its use of a natural, renewable heat source – the Earth. If you plan to stay in your home for many years, a geothermal heating system will likely pay for itself because according to International Ground Source Heat Pump Association, geothermal operating efficiencies are 50-70% higher than other heating systems, which represents a substantial lowering of energy costs.

And according to a leading electric utility company, the cost of electricity for operating a geothermal heat pump is lower than any other heating system which includes natural gas, propane, and oil.

Beyond lower energy costs, geothermal heating leaves a smaller carbon footprint than other heating systems. According to the U.S. Environmental Protection Agency, carbon dioxide (CO2) emissions from the average U.S. home is 17%, most of which comes from burning fossil fuels for electricity. Geothermal uses natural heat from the ground and therefore uses 30-60% less energy than more conventional heating and cooling systems. Using less energy equals less carbon dioxide production.

A geothermal heating system is only as effective as the equipment used to deliver it throughout the building. The most common delivery method is through a ground source heat pump. This pump pulls the heat from the earth and distributes it. When properly installed and maintained, a ground source heat pump can last 15-20 years and provide an excellent source for heating – and cooling.

The components of a geothermal system also include a compressor, air handling unit, and duct system. When all are installed and maintained correctly, a geothermal heating system will be just as effective in heating a building’s interior as any other heating system. Just be sure you hire a qualified heating and cooling professional to install and service your geothermal heating system.

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What Is Forced Air Heating? A Question From Cocolalla

Wednesday, September 28th, 2011

Chances are that you’ve heard the term forced air heating in Cocolalla before, particularly if you’re in the market for a new home heating system. But what does that actually mean? The truth is that if you’re asking this question, you’re not alone. There are so many types of home heating systems out there that it’s common to be a bit confused and overwhelmed by it all.

The truth is that a forced air heating system is simply a heating system that distributes heat throughout your house using air to carry it. In this type of system, heated air travels through a system of ducts and is expelled through vents into the different rooms and areas of your home in order to maintain a particular temperature. That temperature, of course, is whatever you set your thermostat to, and when the desired temperature is reached, the heat will shut off until the temperature drops down again.

The main difference between the different types of forced air heating systems is the type of equipment that heats the air. For instance, you could have a gas furnace or a heat pump. Both of these are capable of heating air, and when paired with a fan, blower or air handler, can distribute heated air throughout your home.

Many forced air heating systems are remarkably energy efficient and can effectively keep you home comfortable all winter long. Additionally, they are generally made to be incorporated with central air conditioning systems for year round temperature control. Heat pumps are especially convenient in this way, as they’re able to both heat and cool your home depending on the season and your home comfort needs.

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A Question From Valley Ford: What Is AFUE and Why Should I Care?

Monday, September 26th, 2011

If you’ve been shopping for a furnace in Valley Ford, chances are you’ve noticed that each furnace has its own annual fuel utilization efficiency (AFUE) rating. These generally range from 80% to the high 90% s and the higher the number, the more fuel efficient that particular furnace is.

But what does this number really mean and just how much should you care? Well, the AFUE rating should actually have a significant impact on your furnace purchasing decision, but that doesn’t mean that you’ll always choose the furnace with the highest efficiency rating either.

For one thing, you’ll have to recognize that not every type of furnace is capable of running at the highest efficiency levels. Oil furnaces, for instance, can’t compete with the super high efficiency gas furnaces on the market today. That’s not to say that an oil furnace might not be the best choice for you under certain circumstances, but it does mean that you should take a close look at your furnace usage before you make a decision.

If you do choose a gas furnace, you will of course have the option of getting one that can reach up to 97% or so efficiency. However, that may not always be the best choice either. If you live in a place where with very harsh, long winters and you’re going to be using your furnace heavily, then it’s definitely worth investing in a higher AFUE furnace that can save you considerable amounts on your monthly heating bills.

But if you don’t use your furnace too often as your area has more mild winters it’s probably not worth it for you to invest in such a high efficiency product. That’s because the higher the AFUE of the furnace, the more expensive it is to purchase and install. Certainly you’ll save money every month because you’ll be getting more heat out of the fuel you’re paying for. But if you don’t use your furnace all that much, the savings really won’t be that substantial.

Don’t forget that a furnace with an 80% AFUE rating is still quite energy efficient. And once you get up that high, you have to use your furnace a lot for the difference between 80% and 90% to really become apparent. So if you don’t use your furnace heavily during the winter, it will take you many, many years to make up for the higher purchase price of the 90+% AFUE models.

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