Sound Heating and Air Conditioning Inc. Blog: Archive for the ‘Indoor Air Quality’ Category

Plants & Indoor Air Quality: A Tip from Tacoma

Monday, October 24th, 2011

In our Tacoma elementary school, we were taught that plants are the “lungs of the Earth.” They remove carbon dioxide from the air and release oxygen, which is great because it is the exact opposite of our respiratory process. They also clean the air in the process, like natural air pollution scrubbers, improving the quality of the air around them.

Given this, it’s not surprising that people have sought to harness the respiratory power of plants to improve air quality in their homes. One study by the National Aeronautics and Space Administration (NASA) in the 1980s even identified the best plants for improving indoor air quality.

This seems like great news for people who suffer from asthma or allergies, or who just want a natural way to purify the air in their homes. However, plants are not without their drawbacks. It is not a simple as to just bring a plant into the home. A plant is really an entire ecosystem, with many other organisms latched on for dear life. There are bacteria in the soil, for one, and there may be bugs or fungi in the soil or on the plant that you can’t even see.

Most of these are harmless, but not always. The fungus can be a problem, for example, if the spores get into the air. This can make allergies and asthma worse, not better.

That doesn’t mean you have to toss out that nice spider plant or Boston fern in the garbage, however. After all, it is probably doing a great job of filtering out some inorganic pollutants, it’s increasing the oxygen concentration of the room and it looks nice. Instead of getting rid of it, just give it a partner.

Adding an air cleaner like a fan with a filter can help purge the organic gunk that may be coming from the plant, while the plant is taking care of the other stuff. The result is cleaner, better air, which can be a relief to asthma and allergy sufferers.

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Essential Components of a Home Comfort System: A Tip from Federal Way

Wednesday, October 19th, 2011

Indoor comfort in your Federal Way home is defined by several factors: temperature, humidity, and air quality. If any one of the three is out of the “normal” range it can affect the quality of life for the building occupants.

The ultimate goal of any heating & cooling contractor is to ensure that customers are comfortable – meaning that all three factors are addressed when servicing, replacing, or installing new equipment in a home. This equipment includes furnaces and air conditioners but also extends to humidifiers, dehumidifiers, electronic filters, ultraviolet (UV) lighting, infrared heating, etc.

Obviously, the essential component for most U.S. households is a furnace. Air conditioners may not be essential for all parts of the U.S., namely the northern states, but are still considered an integral part of any home comfort system.

Let’s look at the furnace first. There are several choices but most can be found in two different classifications: single-stage or variable speed two-stage. Your choice depends on the indoor square footage, your own comfort needs, and possibly the cost of energy units (gas or electric for example). Forced air is a common method of moving heated air to all parts of the home via an air handling unit and through a duct system. But gaining in popularity is radiant heat (electric), which does not utilize a duct system.

Air conditioners also come in a variety of sizes, including window/room air conditioners or central air conditioning, which is likely a “split” system including an outdoor unit and indoor coil. The size of the air conditioner is determined by square footage, which is part of a load calculation performed by qualified heating & cooling contractors while planning the equipment replacement or new installation. An oversized air conditioner may produce high humidity levels and an undersized unit may not provide enough cooling to all areas of the home. High humidity levels contribute to higher indoor temperatures in the summer, and can also lead to respiratory problems.

If someone in your home has allergies or is sensitive to certain pollutants in the air, it may be important to include extra filtration in your heating & cooling system, such as electronic filtration and UV lighting mounted in the buildings duct system, to kill germs and contaminants.

As always, it is best to consult with a qualified and licensed heating and cooling contractor who can offer the best solutions for your home comfort system.

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The Effect of Dust Mites on Indoor Air Quality: A Tip From Covington

Friday, October 7th, 2011

There are three types of indoor air pollutants in your Covington home– particles, bioaerosols and gases. Dust mites are a special case because they are nearly invisible to the eye, but represent a substantial bioaerosol that can make it harder to breathe and result in a number of sometimes debilitating symptoms.

What Are Dust Mites?

Dust mites are tiny arachnids related to ticks and spiders that cling to fabric like curtains, carpet and upholstery. They resemble dust in the air and thrive in high humidity conditions. So, the easiest way to treat a dust mite problem is with proper dehumidification. Knowing whether dust mites are a real problem if you simply have a lot of dust and pollen floating around is tough. Here are some common symptoms to look for:

  • Dizziness
  • Nose Irritation
  • Respiratory Irritation
  • Cough
  • Chest Tightness
  • Asthma (made worse)
  • Allergic Reactions

Because dust mites are alive when you breathe them in, they can cause severe irritation to your throat and lungs and result in a number of uncomfortable reactions – ranging from a runny nose to a full blown allergic reaction.

Getting Rid of Dust Mites

So, how do you get rid of these tiny arachnids? The first step is to improve the humidity level in your home. Anything under 50% humidity makes it impossible for dust mites to survive, so air conditioning is the best step to remove the threat of these little bugs.

Tiny dust mites are among the larger air pollutants and can be captured by most MERV 10+ filters on the market. A HEPA filter will absolutely remove them as well, along with any other particulate or bioaerosols in your home.

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IAQ – Ultra Violet Lighting: A Tip From Des Moines

Friday, September 16th, 2011

With a state of the art home comfort system in place, complimented by a high tech indoor air cleaner, you may think you’re set to take on climate and contaminant related challenges to your air quality in your Des Moines home. But you’re probably missing one thing, and that’s the ability to remove living contaminants like bacteria and viruses from your indoor air.

Unlike non-living particulate indoor air contaminants, bacteria and viruses are not easily caught by indoor air filters or ionizers. They often slip through and continue to circulate again and again through your home, greatly increasing the likelihood that you and your family will get sick. They also tend to reproduce, so the longer you go without eliminating these germs, the more of them there will be.

Killing those Germs for Good

Fortunately there is a technological solution to this indoor air quality problem. The inclusion of ultra violet lights into your air purification system not only specifically targets bacteria and viruses; it helps to slow the spread of disease when someone in your home gets sick.

UV germicidal lights are extremely effective at removing all types of living contaminants from your indoor air. Unlike HEPA filters and air ionizers, UV germicidal lights don’t try to remove these contaminants by trapping them. Instead, they kill them outright, making sure that the germs can’t stick around to reproduce or work their way free of the containment system.

Installation and Maintenance

For most indoor air contaminants, you want to have someone test your air first. However, with bacteria and viruses, you can rest assured that they are always in the air around you. It often only takes a smaller number of pathogens to make someone ill.

Most UV germicidal lights are easy to integrate into your existing indoor air cleaning system. They are usually installed just past the filters so they can catch the germs without other indoor air contaminants getting in the way. And best of all, UV germicidal lights require very little attention or maintenance.

Simply put them in place and let them do their work. You should schedule a routine maintenance visit every so often to make sure that no part of your indoor air cleaning system needs to be repaired or replaced. But other than that, installing UV germicidal lights in your home allows you to relax and enjoy a completely contaminant free living environment.

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The Facts about Indoor Air Quality

Friday, July 8th, 2011

One of the least understood aspects of your home’s comfort system is the indoor air quality. Most people assume that once they have a good furnace and air conditioner installed, there’s nothing left to worry about. However, with the push in the last 20 years to reduce energy loss through poor insulation, most homes are sealed up tighter than ever before. This doesn’t just cause stuffy indoor air – it can actually lead to illness.

How Bad Can Indoor Air Quality Get?

Homes built in the 1980s were recommended to have one third of the ventilation of those built before. Today, the standards have returned to their original levels, but for many years, homes were built with poor ventilation and excessive insulation. The result is a space that holds the air in too well. Everyday contaminants and allergens like dust, pollen, pet dander, mold, or smoke cannot get out of your home and as a result, you can get sick.

In fact, some people even suffer from Sick Building Syndrome (SBS). This is when they feel ill constantly, with respiratory symptoms that have no root cause and are hard to diagnose. Often, it is because they simply breathe too many contaminants and too much stale air.

Fixing Air Quality Is Simple

The first thing needed to fix air quality is a good filtration system. Despite what many people think, simple filtration is not that expensive. There are big, powerful purification systems with advanced ionization units and UV lighting to kill bacteria and viruses, but most families are served well with a simple HEPA filter to remove things like dust, pollen and dander.

It’s a good idea to have your indoor air quality tested, however, just to make sure other contaminants are not present. High humidity can lead to mold growth, and poor ventilation can lead to exhaust or gas fumes in your home. A good carbon monoxide detector is recommended for the latter, but testing should be done to make sure nothing else is floating around.

Finally, make sure your home is properly ventilated. Standard ventilation tends to leak heated or cooled air outside, so many homeowners now opt for energy recovery ventilators. These systems have heat exchangers that transfer warm air between indoor and outdoor air.

However you want to fix your indoor air quality issues, know that there are plenty of things you can do with the help of a good filtration device and regular cleanings of your ductwork and vents.

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Whole House Air Quality System. What Is It? When and Why Do You Need It?

Wednesday, July 6th, 2011

There are many ways to control the indoor air quality of your home. The easiest way to is to clean your vents and ducts. This reduces the number of pollutants like mold and dust that get into your air each day. In some cases, however, you may need something more powerful and that’s where a whole house air quality system comes in.

What Does Whole House Air Quality Provide?

There are many filters and purifiers on the market that can be operated in a single room such as your living room or the bedroom of your child. However, if you have a more substantial contaminant problem, a whole house system actually attaches to the source of fresh air.

Most whole house systems integrate directly into the ventilation ducts and fans of your house. This ensures the air is purified and cleaned as it enters your home, not after it has circulated for some time. Air cleaners are also integrated into ducts where UV lighting and ionizers can remove bacteria, viruses, smoke and exhaust fumes that come in from outside.

Your furnace and air conditioner will also be filtered above and beyond standard manufacturer filtering, ensuring there are less contaminants traveling through your ducts to start with.

When Do You Need It?

The upgrade to a whole house system isn’t just for those suffering from dust, pollen and pet dander. These can easily be removed with regular cleaning of your ducts and a HEPA filter in each room affected. However, if your home tests high for various gases, exhaust fumes, or molds that are beyond your control, a whole house system is a great way to protect yourself.

In particular, these systems are useful when the contaminants come in from outside. Most indoor contaminants can be removed with careful maintenance of your comfort system, but if your neighbor has a leaky exhaust pipe or if you live near a busy highway, you can’t do much about it other than to filter the air as it comes inside.

Choosing a whole home air quality system starts with knowing what you need to filter. So, proper air testing is highly recommended. After testing, make sure your current systems will integrate well with the new air quality controls. If everything works properly, you’ll be well on your way to fresh, clean air in no time.

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Energy Recovery Ventilator – What Is It and When Do You Need It?

Monday, July 4th, 2011

It isn’t cheap to heat and cool the air you circulate through your home every day. In fact, heating and cooling can be the most expensive energy related systems you operate. So, the last thing you want is to open a window and pour all of that conditioned air into the great outdoors.

That’s why most modern homes are sealed up so tightly. The heated and cooled air you enjoy so much needs to be retained, both to save money and to reduce your energy use. It’s why the government offers credits for things like insulation upgrades and the purchase of more energy efficient comfort systems.

But, while sealing everything saves you money and reduces your energy use, it can negatively impact your indoor air quality. Without proper circulation and ventilation, the air in your home grows thick with indoor contaminants like pet dander, pollen, dust, and possibly even bacteria or gasses. Normally, these things would be circulated outside through traditional ventilation. But, because of your heating and cooling system, the age old method of cracking a window to let a little fresh air in just doesn’t work anymore.

An energy recovery ventilator solves this problem. Instead of just pouring heated or cooled air outside and replacing it with fresh air, an energy recovery ventilator passes the air through a series of chambers. Within those chambers the heat is transferred from the warmer air to the cooler air.

In the winter, this means the indoor air passes its energy to the incoming air, retaining the heat your furnace or boiler generated. In the summer, the air coming in from outside passes its heat energy to the cooled indoor air as it leaves and only cool air enters your home.

In effect, an energy recovery ventilator works to reduce the cost of both heating and cooling. It is true that most indoor air quality systems are designed to remove many of the contaminants you flush outside, but relying solely on your air purifier or filter puts undue stress on the equipment. Not only will you need to replace filters and cartridges more often, you may need to replace the entire system earlier than you would otherwise. If you’re tired of losing all that conditioned air just to get a fresh breath, look into these amazing machines for your indoor air system.

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How Often Do You Change Your Filters?

Friday, June 17th, 2011

The core component of any good air quality system is the filter. A good air filter removes almost all of the particles that inundate your home every day – from the pet dander that flakes off of your cats or dogs to the pollen released by plants both indoors and out.

But many homeowners are not aware of when they should change the filters in their air quality system. They know it should be done regularly, but how often and when do you ignore the manufacturer’s recommendation to ensure higher quality air?

Know Your Home

The first thing to consider is the size of your home and what types of contaminants you must deal with each day. Air testing helps with this, as does regular cleaning of the areas around your air filter, including your ductwork. If you don’t have any pets and don’t keep any plants inside, your biggest air quality issue is likely dust, and dust will only fill up the filters quickly if you have a large family.

However, if you have a lot of pets, multiple plants and a large family, the odds are that your filter is being put through the ringer every day – asked to filter out a tremendous number of contaminants. This is when you might need to change the filter more often.

Changing Your Filter

If you have a high quality HEPA filter, it’ll probably work for as long as it’s rated. Only lower quality filters or those not large enough for the space in which they are installed will fail early. However, keep in mind that a HEPA filter, even when it can last longer, should always be changed no later than the manufacturer’s recommended date.

For most homes that timeframe is about 6 months. However, some higher quality filters can last as long as 12 or even 18 months in the right conditions. If you use your air filter in conjunction with an air purifier, you should also have the cartridges changed out at the same time as your filter.

If you think you are changing your filters too often, you can always have your air tested to determine if the contaminants in your home require less filtration. Some home have filters larger than they need installed or lower grade filters that get changed too often unnecessarily. As long as your family is safe and healthy, you might as well try to save some money.

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Worst Rooms in Your Home to Collect Allergens

Wednesday, June 15th, 2011

Your home is a haven for allergens, but some rooms in particular are much worse than others. They are damp. They are warm. They often have garbage in them. These are the rooms that need especially close attention when trying to maintain air quality in your home.

Basement

First on the list is your basement. A basement is the biggest problem when it’s either unfinished or not used very often. If you have water leaks in your basement or poor insulation, it’s important to have a moisture barrier put in and have your pipes checked. If the water comes from a drainage pipe or your sewer line, repairs can be made. If it comes from excess ground water or leaks in the foundation, a sump pump or drain tile system will help remove the excess water. Either way, the wetter your basement gets, the higher the risk of mold and other contaminants becomes.

Beyond moisture, a basement tends to collect a lot of dust. After all, it is where we put many of our old and unwanted possessions, and because the furnace is often in your basement, all that damp, allergen filled air gets cycled back into your home.

Bathroom

Bathrooms are allergen havens for two reasons. They are filled with moisture, and without proper ventilation they will soon be filled with mold and mildew. Additionally, when not cleaned regularly they can house buildups of hair, skin, and other dust building residue that tend to trigger allergies.

The easiest way to handle this problem is to clean your bathroom regularly and make sure it is properly ventilated. Short of an exhaust fan in your bathroom, keep the door and windows open to help it dry faster.

Kitchen

Your kitchen produces allergens like mold and mildew due to the presence of garbage and fruit. It can also attract bugs and the dirt that accrues from people passing through constantly. Pets tend to eat in the kitchen, leaving behind dander. Additionally, plants and vegetables in the kitchen release pollen that circulates through your home to trigger additional allergies. Exhaust from cooking and smoke can also be a harmful allergen trigger.

The kitchen should be kept well ventilated and clean at all times. Check for any gaps in your insulation and have your exhaust fan and hood cleaned regularly to avoid backups of smoke or gas.

Allergens are everywhere in your home – with careful attention, however, you can stop them from affecting your family negatively.

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What is a Whole House Fan?

Monday, June 13th, 2011

Cooling your home is a big deal. Especially if the temperature in your home is generally very high in the summer, the cost of air conditioning is tremendous. A central air conditioner can cost between $2,000 and $4,000 to run for an average 2,800 square foot home over the course of six months. That’s a lot of electricity just to stay cool.

That’s why a whole house fan is a great option for those that want to forego the use of direct air conditioning for at least part of the year.

What It Does

A whole house fan is different from a standard air conditioner because it doesn’t use a heat exchanger to remove heat from air before it enters your home. That heat exchanger is the culprit for a large percentage of an air conditioner’s energy consumption. A whole house fan can be used when the temperature outside is lower than inside, a common occurrence on moderate days in the summer.

The whole house fan draws air and then cycles it through your air vents without cooling it. The act of moving air through your home, however, is often enough to cool the space to a comfortable level. The size of your whole house fan depends on quite a few things. First, how big is your home? Large homes that require even cooling need a larger fan to draw in air. However, small homes can often get away with models that use as little as 120 Watts of electricity. That’s less than your computer uses.

Choosing a Fan for Your Home

Keep in mind that a whole house fan only works when the temperature outside is lower than inside. If the air outside is excessively humid or if it is very warm in the hottest months of summer, you will still need an air conditioning unit. But, even if you run your air conditioner for two months out of the year, you’ll save a tremendous amount of money in the other four months by operating a whole house fan.

Whole house fans should be used in conjunction with an effective air purification system to ensure all outdoor contaminants are effectively removed before they are cycled through your house. They also require the same level of maintenance and cleaning as a normal AC system. However, with the right care, they work wonders to cut down on your energy bill.

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