Louisville HVAC Tip: How to Improve Your Indoor Air Quality

April 2nd, 2012

When we think of air pollution in Louisville we often think of outdoor “smog”, but the air in your home or office may also be polluted, even if it looks clean. Sources of indoor pollution include:

  • Mold
  • Pollen
  • Cigarette smoke
  • Household cleaners
  • Household décor and furnishings (like rugs and paint)
  • Household pesticides (like rodent or ant-killers, or plant sprays)
  • Radon
  • Carbon monoxide
  • Building materials (like asbestos and lead)

Indoor air quality is of particular concern in newer, better-insulated homes, or in older homes that have been recently weatherized. The “tightness” of modern houses means that any pollutants that get into the home stay there – and perhaps even increase in concentration over time if the source of the pollution is inside the house.

Indoor air quality problems can cause discomfort and even serious disease, especially in children. The good news, though, is that there are many effective ways to improve indoor air quality.

There are three basic strategies for improving indoor air quality:

  • Air purification. Air cleaners range from small tabletop models to full-house models that are part of the central heating and cooling system. Small air purifiers are typically not very useful, but central air filters can be very effective at removing airborne contaminants. If your Louisville heating and cooling system does not include central air filtration, you should consider an upgrade to a new system.

    It is important to note that air purification will not remove gases like carbon monoxide or radon from your home. Gas pollution must be remedied by professionals.

  • Ventilation. Many Louisville forced-air heating and cooling systems do not bring outdoor air into the home. Kitchen and bathroom exhaust fans and attic ventilation fans (when weather permits) can be very important in promoting the circulation of air. Also, opening windows is very important, especially when doing short-term activities such as painting that increase the number of pollutants in the air.

    You should also consider upgrading to one of the newer central heating and cooling systems that bring outdoor air into the home.

  • Source control. This is the most important indoor air quality strategy, and in many cases, the simplest one. Source control is definitely the most cost-effective strategy for improving indoor air quality, because purification and ventilation both require a constant use of energy.

    Switch to all-natural household cleaners, buy household furnishings made of natural fibers (instead of synthetic fibers that can “off-gas” volatile organic compounds). When painting, use VOC-free paint. Quit smoking, if you haven’t already.

    And, don’t forget to install a carbon monoxide detector in your home, ideally next to the sleeping areas.

For more ways to improve the indoor air quality of your home, give AccuTemp Heating & Air Conditioning a call today!

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Jeffersontown Heat Pump Tip: SEER vs. HSPF

March 26th, 2012

When it comes to heat pumps, there are two different ratings you’ll often see – the SEER and the HSPF. So, what does each of them mean and which rating is more important when purchasing your new Jeffersontown heating and cooling device? Here are a few things to consider:

SEER

The acronym SEER is short for “seasonal energy efficiency rating” and is used most commonly to measure air conditioner efficiency or in this case, the cooling capacity of your heat pump.

 HSPF

The HSPF is short for “heating seasonal performance factor” and is a measurement of how efficient the heat pump is in producing heat during the cooler months of the year.

 The Difference Between the Two

Every heat pump will have both of these ratings, allowing you to see how efficient each is. This is important because you need to know for certain how well your heat pump will perform under certain situations – both in the winter and summer.

However, if you live in a colder climate where the summer rarely calls for air conditioner, your focus should be on the HSPF first. And if you live in a warmer climate where your heating needs are minimal, the SEER is most important. Another thing to consider is your supplemental heat. If the cost of your supplemental heating system is high, you’ll want an HSPF that is as low as possible to balance it out.

 Choosing an Efficient Heat Pump

Heat pump efficiency directly impacts the price of the device you purchase but is almost always worth the difference. The key is to find a device that provides what you need based on where you live. Keep in mind as well that, like most HVAC upgrades, you won’t immediately recoup the cost of the device in your energy savings, so if you plan on moving soon, you should purchase a more affordable device now and upgrade later.

Purchasing a heat pump in Jeffersontown is an important step in making your home more energy efficient. If you are unsure which rating you need or how to analyze their meanings, contact AccuTemp Heating & Air Conditioning to learn more.

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Louisville Heat Pump Guide: When Is it Time for a Backup Heating System?

March 21st, 2012

A backup heating system is sometimes necessary for Louisville homeowners who heat their homes with an air-source heat pump. This style of heat pump transfers the heat from the outside air to your home in the winter, and it pushes the warm air outside the home in the summer. Although some systems are efficient enough to work in colder climates, most Louisville heat pump systems require a backup heater when temperatures drop below 20° F.

Furnaces are commonly used as a backup heater for air-source heat pumps, especially since the furnace fan blower can help distribute the hot air throughout the home. Although they are more expensive to buy and install, geothermal heat pumps typically do not require a backup heating system. These are also called ground-source or water-source heat pumps since they draw in heat from the ground below the house or from a nearby water source. Because they take advantage of the ground or water temperatures, they are also easier to maintain and have lower operating costs.

Getting the most cost-efficiency from a geothermal heat pump will depend on several factors, such as the size of your property, the temps of the subsoil, and access to local water sources. You will most likely not have to install a backup heating system with a ground-source or water-source heat pump; however, it is important to think about the installation costs and the variables that need to be in place before deciding on this type of heat pump.

Absorption heat pumps use a heat source, such as natural gas or solar-heated water, instead of electricity. Natural gas is typically used for absorption heat pumps, so they are also called gas-fired heat pumps. Depending on the source of the heat, you may or may not need a backup heating system. It’s always best to speak to a professional Louisville heating and cooling contractor if you are not sure when it’s necessary for a backup heating system.

Call AccuTemp Heating & Air Conditioning if you have any questions about a backup heater for your Louisville home.

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Louisville Heat Pump Repair Question: Why Do Heat Pumps Need Refrigerant?

March 14th, 2012

Despite its name, a heat pump is not designed solely for heating. In fact, the technology in your Louisville heat pump was originally designed for air conditioning and is used today in air conditioners, refrigerators and cooling units in vehicles and airplanes. And the entire process relies on refrigerant – a chemical compound that is compressed and expanded to move energy from one environment to another.

How Refrigerant Makes Heating and Cooling Possible

Your heat pump has multiple components designed to transfer refrigerant from one state to another. The compressor, for example, compresses the refrigerant into a liquid. The liquid is then moved through the expansion valve to the evaporator coils where it expands into a gas. Because refrigerant evaporates at much lower temperatures than water, it does this rapidly and in the process draws heat from the surrounding environment.

That’s how an air conditioner or your refrigerator cool a space. However, in the case of a heat pump, the process can work in both directions. In cooling mode, your heat pump extracts heat from the air going into your home. In the case of heating mode, the heat pump extracts heat from the outside air. Because the heat is transferred into the refrigerant, it can then be recompressed by the compressor. The heat is then is then released in the condenser coils, where the gas returns to liquid state. A blower then distributes air blown across the condenser coils into your home as heat.

Troubleshooting the Process

A heat pump is a complex piece of machinery, but once you know how it works, you can perform quite a bit of troubleshooting should anything go wrong with the device. For example, if you notice cold air coming from your vents, you can check to make sure it isn’t in cooling mode and that there is enough refrigerant in the device.

Keep in mind that if any service needs to be performed on the heat pump involving refrigerant, you should call AccuTemp Heating & Air Conditioning due to the volatile nature of the chemical. In most municipalities, you must have a license to distribute or dispose of refrigerant and even if not, it can be dangerous to both you and the environment.

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Fairdale Heat Pump Tip: Outdoor Maintenance

March 7th, 2012

Sometimes, the trickiest part about owning a heat pump in Fairdale is keeping the outdoor components maintained. Because they are outside and generally out of sight, it can be easy to forget or neglect them. But because they are outside and exposed to the elements, outdoor heat pump components need attention and maintenance to keep them running properly.

The two most important routine maintenance functions you can do as an owner of an outdoor heat pump are keeping it free of debris and keeping it level.

Every month or so, inspect and clean your outdoor heat pump to make sure it is free of leaves, dirt and other debris. These can easily be sucked in by the fan and reduce the efficiency of the whole system. Turn the power off to the unit and use a vacuum or broom to remove any accumulated debris.

Once or twice a year, use a carpenter’s level to make sure the whole thing is sitting level on the pad. Use the level to gauge both side to side and front to back. While you are doing this, check the insulation for erosion or gaps. If you see that it is not level or the insulation is wearing thin, have a contractor come out reset the unit on the concrete pad or patch up the insulation.

These are two small maintenance tasks that you don’t have to do very often, but they can make a big difference in the performance and life of your heat pump.

In addition, you should always have your whole heating, ventilation and cooling system inspected by Accutemp Heating & Air Conditioning annually in order to keep everything maintained and in good repair.

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Norbourne Estates HVAC Question: What Happens if You Put Your Air Filter in the Wrong Way?

February 29th, 2012

Air filters are important pieces in your Norbourne Estates home’s comfort system. They keep unwanted debris and sediment out of your indoor air and they help your system run smoothly for years to come. However, if you’re not careful, an air filter put in backwards can lead to quite a few problems with your heating and cooling system.

The Most Common Problems

The most common problem you will face with a backwards facing filter is simple inefficiency. If your furnace is forced to blow air through the non-porous end of a filter, it will take more energy to do so. The blower will be overworked and you will pay more money for your heating. The same is doubly true for an air conditioner which has multiple filters in place to keep outdoor contaminants out of your indoor air.

Beyond the cost of improper filtering, you will likely suffer from a decrease in indoor air quality. The filter is designed to remove a lot of unwanted debris, but only when installed in a certain direction. If you set your filter up backwards, the normally collective end of the device will not face the air supply. In effect, your filter will help keep debris in the air.

This results in a clogged filter and improperly cleaned air when it reaches your lungs. If you have a home indoor air quality system it will help to supplement this problem for a while, but the clog will eventually become too much for your system.

Avoiding the Problem

There are two ways to avoid improper installation. First, you can have a professional install the system for you. Whenever you need a new filter ask someone to come and take care of it. When they do, though, pay close attention to how they set the filter and any other steps they take. By carefully watching you can ideally learn what it takes to do this step yourself and hopefully keep your system running smoothly for years to come.

If you have any questions about maintaining your heating and cooling system, give AccuTemp Heating & Air Conditioning a call!

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Douglas Hills Heating Installation Guide: Downflow Gas Furnaces

February 24th, 2012

Proper care of a downflow gas furnace starts with proper installation and continues through routine cleaning and maintenance. But before you can even have a downflow gas furnace installed, you need to make sure it’s the right fit for your Douglas Hills home.

Downflow gas furnaces are so named because of the direction that air flows through them. The cooler air is taken in at the top and directed downward, heating up as it travels, and then is expelled through the bottom of the furnace into ducts that feed the rest of the house. Because of this configuration, downflow gas furnaces are typically installed in attics as opposed to basements.

If you have a basement and you’d rather install your furnace there, then an upflow furnace is probably the better choice for you. However, as many newer homes don’t have basements at all, downflow gas furnaces are growing in popularity and usefulness.

As with any other furnace, it’s important to have a downflow gas furnace professionally installed. This will ensure that the venting system is properly in place and that your house will be heated as effectively and efficiently as possible.

Of course, there are some other things you can do to help your furnace heat your home and keep your energy bills down. For instance, make sure you have proper insulation everywhere, particularly in the attic and crawlspaces where much of the normal heat loss in a home occurs.

You can also make your home more airtight in the winter by sealing up any unused windows and doors with plastic and making sure all storm windows are in place. Basically anyplace that a draft could develop, you could be losing heat and that costs you money. So to ensure that all of the money you’re spending to heat your house is actually going to that purpose, check periodically to make sure your home is still sealed up tight.

Also, just like any other type of furnace, a downflow gas furnace will require regular maintenance to make sure it continues to run efficiently and to replace any parts that may have worn out over time. Having a professional technician come out once a year to carry out this type of service will wind up saving you a bunch of money and can help catch problems before they are able to get out of hand.

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Valley Station Heat Pump Guide: Understanding the Heat Pump Defrost Cycle

February 22nd, 2012

If your Valley Station home has a heat pump, you’ll want to understand the defrost cycle to help you maintain your heat pump and troubleshoot repairs. While this is a basic guide, you should call a qualified HVAC technician if you experience major issues with your heat pump.

During the winter when a heat pump is heating your home, the cooler outdoor air that’s pumped in and heated may have excess moisture. The outdoor coil evaporates this moisture, but under certain weather conditions, frost can accumulate on the coil and decrease the overall efficiency of the heat pump.  To help reduce the potential for damage from the frost, heat pumps are manufactured with a defrost cycle to melt the frost from the outdoor coil. The defrost cycle occurs often during heavy frost conditions, so check weather reports if your defrost cycle seems to be running often.

At the beginning of the defrost cycle, the heat pump switches to the cooling mode and temporarily warms up the outdoor coil until it reaches somewhere around 60° F to melt the frost from the coil. To increase the temperature of the coil, the outdoor fan is prevented from turning on until the outdoor coil reaches the desired temperature. Weather conditions and the timing device both affect the amount of time it takes for the heat pump to move through the entire defrost cycle.

In older homes, electric heating elements are sometimes installed to prevent cool air from being distributed throughout the home. This element will turn on with the defrost cycle and shut down the blower fan inside the house. If you have an older heat pump, you may want to consider upgrading to a more efficient model.

Call AccuTemp Heating & Air Conditioning any time if you have questions about the defrost cycle for the heat pump in your Valley Station home.

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Happy President’s Day from Your Louisville Area HVAC Contractor!

February 20th, 2012

Everyone at AccuTemp Heating & Air Conditioning wishes you a very happy President’s Day! Fun fact: though it is commonly referred to as “President’s Day” this holiday is still officially called “Washington’s Birthday.” There was an attempt to change the name of the holiday in 1968, but the proposal failed.  It is traditional to celebrate this holiday with cherries, in honor of George Washington.  While the name hasn’t officially changed, today has come to be about all of our nation’s presidents, and a celebration of all that they accomplished. In honor of this holiday, here are some fun trivia questions to stump your friends and family:

  • When was Washington’s Birthday first celebrated?
    • During his presidency his birthday was celebrated every year. However, Washington’s Birthday officially became a holiday in 1885.
  • Who was the oldest president elected?
    • Ronald Regan (69)
  • Who was the youngest president elected?
    • John F. Kennedy (43)
  • Who was the tallest president?
    • Abraham Lincoln (6’4’’)
  • Who was the shortest president?
    • James Madison (5’4’’)
  • Which state is the birthplace of the most presidents?
    • Virginia (8 total; George Washington, Thomas Jefferson, James Madison, James Monroe, William Henry Harrison, John Tyler, Zachary Taylor, and Woodrow Wilson)
  • How many states are named after a president?
    • One (Washington, DC)

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Prospect Heating Replacement Question: What Is Involved in Replacing an Old System?

February 17th, 2012

When your Prospect home’s HVAC system starts to fail — or if it already has — your options essentially come down to two: replace or repair. There are a lot of factors that go into making such a decision, but in general, if it is a newer system with a small problem and you haven’t had much trouble with it, then a simple repair clearly makes sense.

For older systems, or ones that have been repaired all to often lately, or ones that seem to be on their last legs, repair may be the only reasonable course of action.

Surely you know that a total system replacement would be a big job, but have you ever thought about just how big? Sure, you know you will have to swap out the failing furnace, and you may as well replace the air conditioning unit while you’re in there, but that’s it, right?

Actually, there is a lot more to an HVAC system than just those two machines. Think about all the behind-the-scenes components and the little components that are often overlooked, such as:

  • Ducts – Keep in mind that your ducts are probably as old as that furnace you are replacing, and that a new, efficient unit cannot operate at nearly its full potential with faulty duct work.
  • Thermostats – Your old ones may not even be compatible with a new furnace or air conditioner.
  • Wiring – For the thermostat, among other things.
  • Insulation – Many homeowners forget that insulation is part of an HVAC system, too. Just like we said about duct work, old insulation does not help a new system achieve maximum performance.
  • Piping – Such as refrigerant piping on a geothermal system or a ductless air conditioning system.

You can see that the job starts to get pretty complex pretty fast. This doesn’t mean you should shy away from a necessary replacement, just make sure that you fully consider the scope of what you need done, as well as the budget and time frame you have to work with. If you have any questions about new system installation, give Accutemp Heating & Air Conditioning a call!

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