The Clean Air Act Blog: Posts Tagged ‘Portland’

How Efficient are Heat Pumps for AC and heating?

Monday, October 17th, 2011

Heat pumps are actually remarkably efficient when compared to some of the home heating alternatives out there in Portland. 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. If you have any questions, contact your local contractor.

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The Preventative Maintenance That Will Save You the Most on your HVAC System

Friday, September 16th, 2011

Having a high performance, energy efficient HVAC system will save you a good deal of money in terms of your monthly heating and cooling bills in Estacada. But that efficiency will not last unless you also take the necessary steps to keep your equipment in good working order. While regular maintenance visits from a professional HVAC technician are an important part of this, there are also several things you can do on your own to keep your equipment running at peak efficiency.

  1. Keep it Clear – The first thing you should do is to make sure that there is plenty of space cleared around your outdoor unit. Whether it is the condenser and compressor for your air conditioning system or part of your heat pump, that outdoor equipment needs to have plenty of space to vent hot air. Also, the space will mean that debris is less likely to develop inside the unit.
  2. Clean the Condensing Coil – While your technician will do this when they make their annual visit, it is best to clean your coil more than just once a year. Just make sure that the power is turned off to your unit before you begin. This will help the unit cool air more efficiently and can prevent a whole host of other problems from developing.
  3. Check on the Blower – If your blower is not working right or the blade is clogged, your HVAC unit will not work properly. Make sure your blower fan is free of all debris and that is turns freely once you have cleaned it. If you are still having a problem with it, you may have to call a technician for repairs. Cleaning the blower out on a regular basis, however, should keep this from becoming a problem you need a professional for.
  4. Air Filters – You should also make sure you change your air filters regularly. This can help to keep your indoor air clean and healthy and it will also enable your HVAC system to run more efficiently.
  5. Clean it Out – Clean out any debris that you can reach from any part of your system. Just make sure any time you work inside your HVAC system that you have all of the power turned off. Anything from leaves to dust can get in there and cause a problem if it is allowed to build up over time. As long as you are on top of things and keep to a regular schedule of maintenance, none of this should take you very long.

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Is Your Home More Valuable with Energy Efficient Appliances?

Monday, September 12th, 2011

It’s impressive the things people do to improve the value of their Tualatin home. We’re talking about crown molding, new floors, new siding, upgrades to the landscaping and much more. The cost of upgrading these things can grow out of hand quickly and if the boost to your home’s value isn’t equally exponential, it’s hard to justify the expense.

So, it’s always nice to find a simple upgrade that can be performed for a few hundred dollars that will save you money immediately and improve the value of your home in the future. Your appliances are one such upgrade.

The Value of Energy Efficiency

An energy efficient washing machine can save upwards of $150 per year on water costs. An energy efficient toilet cuts consumption by as much as 150%. Low flow shower heads cut water costs by one third to one half and your heating and air conditioning systems can be improved by 10-35% depending on the upgrades available to you.

When you add up all those savings, the result is a tremendous amount of money that can be saved each year on everything from your water bill to your cooling needs. Imagine what happens when someone looks to buy your home. They see that there are all new appliances with energy efficient ratings that will save them money.

It’s not just lower bills; it’s a decrease in upfront investment. On the surface, it’s unlikely that your energy efficient appliances will directly increase the value of your home, but they can increase the likelihood of someone paying what you’re asking for the home. They add value to the livability of the home, if not the property itself and in today’s housing market, that’s a major plus.

Best Upgrades

The best upgrades to your home’s appliances are the ones that save money without additional work. Major upgrades to your heating and cooling are good if you need an upgrade anyway or you plan on staying in your home for a few years.

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How Do EER and SEER Work?

Monday, September 5th, 2011

If you’ve looked for a new air conditioner in Estacada recently, you probably noticed each unit comes with an EER or SEER rating. The former is for room air conditioners and the latter for central air conditioning units. In both cases, the number is a measure of how efficiently the system uses electricity. Effectively, if you buy a system with a high rating, you spend less on electricity. Of course, there are tradeoffs. The higher rated machines tend to cost much more, so as a homeowner, you’ll have to evaluate how much you can spend now and how long it will take to save money from that investment.

How EER and SEER Are Measured

These numbers are required by the government to tell you, the consumer, how many BTUs per hour the device can use for every watt of electricity drawn. The more BTUs a system can use, the better for your bill.

Let’s say you want to buy a 10,000 BTU system to cool your living room and dining room. A pretty standard number for a single room unit is 11, meaning the 10,000 BTU system would use about 900 watts per hour to run at full capacity. We figure this out by dividing the BTUs (10,000) by the watts (900).

There is a lot of math to do here, so many people simply look for a higher number within their price range. But, at what point is the upgrade really worth your extra money?

Choosing the Right Energy Efficiency Rating

The easiest way to describe this is to compare two similar devices with different EERs:

Air Conditioner 1 Air Conditioner 2
BTUs 12,000 12,000
EER 9 11
Watts 1333 1091
Price $300 $450

In this particular case, we can spend more for a device that is the same size but uses less electricity. The question then is whether that increased expenditure will pay off in the short term. Let’s assume each device would be operated for 10 hours per day for 30 days in a typical summer month. That’s 300 hours of operation. If the average cost per kWh in you are is $0.09, it will take 4 hours for the first air conditioner to consume 1 extra kilowatt of electricity equal to an additional $0.09. If your air conditioner runs for four months out of the year, we know that it will operate for a total of 1200 hours. That means:

[(1200 hrs x 242 watts) / (1000 watts/kw) ] x $0.09/kWh = $26

So, you save roughly $26 per year from that high efficiency unit. With a $150 price difference, you will break even after 6 years (though probably sooner if the price of electricity goes up).

If you want more information about energy efficiency and air conditioners, talk to your local professional.

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What Are Limit Switches and How Do They Work?

Friday, July 29th, 2011

When you set the thermostat on your air conditioning system, you pretty take for granted that the system will maintain that temperature throughout your house. But did you ever stop to think about how it’s actually accomplished? The truth is that there are many moving parts that all play a role in keeping your home cool and comfortable, and one of these is the limit switch.

What Is a Limit Switch?

Although you’re probably not aware of it, you’ve encountered plenty of limit switches over the years. A limit switch is anything that stops an electric appliance under certain circumstances. The little switch that turns the light on in the refrigerator when you open the door and then off again when you close it is the perfect example of a limit switch. Another common one is the switch that stops your washer or dryer from running when you open the door. Limit switches are used for a variety of appliances and gadgets to not only save electricity but to keep you and your device safe.

Limit Switches and Air Conditioning

The limit switch on your air conditioning system is the link between the blower on your air handler and the thermostat. When the thermostat senses that the desired indoor temperature has been reached, it stops the air conditioner from producing any more cold air. At that point, it’s important for the blower to stop functioning as well.

If it doesn’t, the blower will continue to move and warm air rather than cold will begin circulating throughout your home. However, if the blower shuts off too soon, the cold air that’s still being generated by the air conditioner won’t be able to circulate. So it’s essential that the blower be switched off at the same time the cold air stops arriving. That’s exactly what the limit switch does.

While it’s only one very small part of a large machine, the limit switch in your air conditioner plays a vital role in keeping your home comfortable and in allowing your air conditioning system to function as efficiently as possible.

If you notice that your air conditioner is shutting off too soon or not soon enough, it may be because of a broken limit switch. Sometimes, the system simply needs to be reset, something you can do with the help of your owner’s manual. However, if your limit switch is broken, you should contact a professional to take a look and determine if it needs to be replaced.

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Humidification & Dehumidification

Friday, July 22nd, 2011

Most people don’t think much about the humidity in their home unless it gets unbearably high in the summer or extremely low in the winter. However, even slightly low or high humidity levels can have a huge impact on your indoor air quality, so even if you feel comfortable most of the time, a humidifier or dehumidifier is something you should look into. Many homes have humidity problems, and even if it’s not something you notice on a regular basis, air that’s too moist or too dry can have a large impact on your family’s health and the overall quality of your indoor air.

The Risks of High and Low Humidity

There are many reasons that proper humidity in your home is so important. For one thing, air that’s too humid promotes the growth of things like mold and dust mites that are significant airborne allergens. Without enough moisture, however, mold and dust mites can’t grow, so if you keep your indoor humidity below 50%, you’ll likely never need to worry about these allergens disrupting your family’s health or causing damage to your furniture.

But, dry air isn’t much better. Once the humidity level gets below 35%, a number of negative things can happen. Dry air enhances the symptoms of asthma, colds and allergies, and it causes damage to the wood fixtures and furnishings in your home. Even if it doesn’t do so much damage, dry air is simply uncomfortable, causing dried out skin, eyes, and hair.

Why Humidity Control Matters

Even if you have a state of the art air quality system installed in your home, humidity is very much something you need to be concerned about. Air that’s too moist or too dry can actually make it more difficult for indoor air cleaners and filters to get those contaminants out. In effect, poor humidity control makes every aspect of your air quality worse.

So if you want to be sure you’re getting the most possible out of your indoor air cleaner, the best thing you can do is put in a good humidification system as well. And when you’ve done that, you may even find that you can turn down the heat and air conditioning as well. Properly humidified air makes home heating and cooling more efficient, saving you both money on your monthly energy bill and wear and tear on your system. No matter how you look at it, proper humidity control is good for you and your home.

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Sealing Your Home Can Bring Big Rewards

Friday, July 1st, 2011

You use a lot of energy – and money! – keeping your house at a comfortable temperature. But if there are holes in the “envelope” or “shell” of your home, air from the outside can get into your home and drive up your energy costs.

Sealing the envelope of your home is one of the most cost-effective ways to improve energy efficiency and comfort. Energy Star estimates that appropriate sealing can save up to 20% on heating and cooling costs.

There are three ways to seal the envelope of your home:

  • Sealing air leaks to stop drafts
  • Adding insulation
  • Installing Energy Star windows when replacing windows

Sealing leaks. It may be easy to find some of the leaks in your home, because you can feel and sometimes even see them (for example, around windows and doors). You can seal these leaks with caulk, foam, and weather stripping.

Other leaks may be hidden in attics, basements, and crawl spaces. Common leak spots include:

  • Recessed lights
  • Outdoor faucets
  • Dryer vents
  • Attic hatches
  • Around light switches and cable, phone, or power outlets
  • Chimneys and furnace flues
  • The tops of walls that lead up to attic space

To find and seal these hidden leaks, it may be advisable to hire a contractor who can use special diagnostic tools. The expense is often quickly paid back in increased comfort and reduced utility bills.

Adding insulation. There are several common types of insulation — fiberglass (in both batt and blown forms), cellulose, rigid foam board, and spray foam. Different types are appropriate for different places in your home.

The strength of insulation is measured by “R-value” – its ability to resist heat flow. The higher the R-value, the more insulating power. Different R-values are recommended for different parts of your house, depending upon where you live.

Insulating your attic may offer significant savings, and can be a good DIY project if you are handy. To see if your attic can benefit from more insulation, look across your uncovered attic floor. If your insulation is level with or below the attic floor joints, more would probably be helpful.

Remember, however, that even well-insulated attics need appropriate ventilation to prevent mold growth in the summer and ice buildup in the winter.

Installing Energy Star windows and doors. Replacing windows and doors is a big project and may not generate enough energy savings to justify the cost. However, if you are remodeling or building a new home, be sure to choose Energy Star windows and doors. Energy Star windows and doors will not only help seal and insulate your home – they will also act as a sunscreen to protect your pictures, furniture, and carpets.

After Sealing Your Home: Check Air Quality!

After any sealing or insulating project it’s very important to have a professional perform a Combustion Safety Test on your gas and oil burning appliances to ensure that they are still operating safely.

It’s rare that homeowners seal their homes too tightly – especially if it’s an older house. However, if you are concerned, you can hire a contractor to test your home’s ventilation. If your home is too tightly sealed, he or she may recommend that you install a fresh air ventilation system.

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Why Install a Ductless Air Conditioner?

Monday, June 6th, 2011

As you explore your options in terms of a new home air conditioning system, you will probably have to decide whether you want a system that uses ducts to get the cooled air around the house or one that is considered ductless. Each type of air conditioning system is appropriate in certain situations, so it is important to understand the benefits of each before you can make a decision.

Duct air conditioning systems are the more traditional type on the market today. They generally consist of an outdoor compressor and condenser unit and an indoor air handler. The outdoor unit passes the cooled air through ducts to the air handler, which then takes over circulating the air through the house and back out to the condenser again.

It makes sense to install this type of air conditioning system if you have a large house or if you have ducts already in place. Duct air conditioners can cool a moderate to large sized house quite effectively and they can also be coupled with zone control systems to give you multiple climate zones within your house.

Ductless air conditioners, as their name suggests, do not rely on a system of air ducts to get cooled air distributed throughout your house. Instead, these types of systems use refrigerant lines to transfer coolant from the outdoor compressor to the indoor, wall mounted units. Each of these indoor units can take care of cooling one or two rooms, but in order to cool an entire house with one of these systems, you will need to install multiple indoor units.

However, these multiple indoor units can all be connected to the same outdoor compressor, and they can also be controlled independently. That gives you much greater control over which parts of your house are cooled and how much energy you are using to cool areas that may or may not be occupied.

Ductless air conditioners are generally more energy efficient than ducted ones, but their real advantage comes from the facts that they can be installed even in places where air ducts do not exist or cannot go. If you do not already have ductwork in your house, installing a duct system will add considerably to the price of installing a ducted air conditioning system. In a case like this, a ductless system is much easier and cheaper to install and certainly makes more sense.

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