Design Comfort Blog

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

May 23rd, 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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Heat Recovery Ventilator – What Is It and When Do You Need It?

May 20th, 2011

While the design of modern homes is to retain as much energy as possible while minimizing the cost of heating and cooling, that very design can have a negative impact on your indoor air quality. Because air cannot pass freely between indoor and outdoor environments, you are stuck breathing the same air day after day.

Luckily, there are t options that will exchange the heat in your indoor air to the outdoor air as it enters your home. In effect, you can retain all of the heat your home produces each day before it leaves the house. It works equally well in the summer to retain the cooled air your air conditioning units produce.

How Heat Recovery Works

Heat recovery ventilators come in many forms, including simple ventilation, heat exchange, or air exchanging. There are even some indoor heat pumps that will carefully draw heat from the air as it’s removed from your home and recirculate it through your air ducts.

The idea is the same no matter how the system is installed. As air leaves your home through a ventilator, a counter-flow heat exchanger transfers energy between the air leaving and entering your home. So, instead of warm air leaving and cold air entering, the air coming into your home takes the heat from the air leaving your home. Air comes and goes, but heat stays inside.

In the summer, the same system works in reverse to remove heat from the air coming into your home and keep it outside. The one thing to keep in mind with a heat recovery ventilator is that it doesn’t retain the humidity in your home as an energy recovery ventilator would. If you live in an area with very high or very low humidity during summer or winter, an ERV may be a better solution for your needs.

Air Quality Benefits

The goal of a good heat recovery ventilator is not just to retain the heated or cooled air in your home. It is also to ensure you have clean, fresh air to breathe each day. Most people don’t realize, but when you don’t circulate your air and your home is sealed up with enhanced weather-stripping and high quality insulation, unwanted contaminants begin to build up. A heat recovery ventilator makes sure you not only get fresh air, but that it’s properly filtered and the heat or cooling your comfort system produces is retained. No money is lost, energy is saved, and your family stays comfortable and healthy – everyone wins.

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Understanding House Ventilation Options

May 18th, 2011

All the fancy air quality control tools in the world are useless if you don’t have a good ventilation system to circulate air through your home each day. An air filter removes larger particles like dust, dander and pollen, and an electronic air filter removes smaller particles like bacteria, mold, and gases. However, your indoor air will still be poor without a fresh supply of air constantly circulating in from outdoors.

Types of Ventilators

There are a few options here, depending both on the number of contaminants your home has and the amount of heated or cooled air you are willing to lose each day through vents.

The simplest method is an exhaust fan. Fans blow air from your home, creating a negative pressure zone inside. Air inlets then allow new air to enter your home and equalize that pressure. There are also balanced exhaust fans – one fan blowing indoor air out and another fan pulling fresh air in. If you have open flames or gas burning appliances, a balanced exhaust fan is necessary to keep the flames from going out due to the negative pressure caused by a single outlet exhaust fan.

Traditional ventilation, while simple, is also inefficient. In the middle of winter it blows all of your heated air outside and in the summer, it does the same to your cooled air. Your home comfort system likely can keep up with the loss of heat or cooling, so you won’t be less comfortable, but you will certainly pay more on your energy bill.

That’s why heat and energy recovery ventilators are popular in many homes. Especially if you went to the trouble of having your home sealed up tightly to minimize energy loss, these ventilators will save you money.

When air is ventilated through a recovery unit, the energy and heat is transferred between indoor and outdoor air as it passes. In the winter, this means the energy in your indoor air is retained and during the summer, the energy in outdoor air is removed before it enters your home.

Which Method is Best?

The method you choose will depend largely on your current cost of heating and cooling and what types of contaminants you face. Energy recovery ventilators have the added benefit of patching directly into your indoor air quality units, so you won’t need to worry about new contaminants coming in either.

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How a Thermostat Works

May 16th, 2011

Your thermostat is designed to closely monitor and maintain the temperature in your home. When you flip the switch, you want your furnace or air conditioner to respond immediately. So, it’s a good idea to learn how it works so that if there is a problem, not only will you know better what needs to be fixed – you can decide whether to call a professional in for help.

Thermostats shouldn’t need input from you other than to set the initial temperature. From there, they are automatic switches. A thermometer inside the thermostat measures the indoor air temperature. When it gets above or below the limit you’ve specified, it triggers the thermostat to send a message to your home comfort system and keep things nice and comfortable.

Types of Thermostat

Thermostats come in two forms –electromechanical and electronic. An electromechanical thermostat is the simplest and has been used for decades to regulate temperature in homes. It has a simple strip or coil of metal that expands as the temperature rises and contract as it lowers. A mercury thermometer is placed on top of the strip. The coil’s movements cause the vial to tip as the temperature changes. There is a pair of electrical contacts on either end of the vial. The mercury can absorb that electrical current when the electrical contacts touch the thermometer. The mercury then acts as a switch to turn on your comfort system.

An electronic thermostat simply has an electronic sensor that measures the indoor air temperature. You set a temperature for your room and when it changes significantly, the switch inside your electronic thermostat is triggered, causing it to turn on your comfort system.

Ways to Upgrade Your Thermostat

Most homes only need the bare minimum in their thermostats. However, there is some very exciting technology on the market these days that can add quite a bit of value to your system. Not only can you install a programmable thermostat, you can opt for zone control systems that allow multiple thermostats in different rooms of your home.

Programming allows you to set temperatures for certain times of the day. This is especially great if you are gone from the house for long periods of time each day. Why heat or cool a home when it is empty? And if you have multiple people with different temperature needs, zone control temperature control allows you to set specific temperatures for specific rooms in your home – a very enticing option for large families or multi-story homes.

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Installing Automatic Thermostats – Quick Fix to Energy Savings

May 13th, 2011

While you probably spent a lot of time researching your home heating and cooling system to make sure you got one with great energy efficiency ratings and all of the other features you were looking for, one thing you may not have thought a lot about is your thermostat. The thermostat in your home is your direct link to your home comfort system, and the type and quality of the product you have in place can have a much bigger impact on the performance of that system than you may initially realize.

Of course, any thermostat will get the basic job done. You set it for the desired temperature and it will communicate that information down the line to the heating and cooling system. But the better the thermostat you’re using, the better the communication and coordination between the two devices will be. And many advanced thermostats come with all types of special features that can both enhance the quality of your indoor environment and save you some considerable money in the long run.

Saving Money with a New Thermostat

So how can a thermostat save you money? There are actually a couple of ways. For instance, an automatic thermostat can be programmed to switch your heating and cooling system on and off at different pre-set times of day. That means you can have the heat or air conditioning turned off during the day and still come home to a comfortable house. Simply set the thermostat to come on right before you get home and you’ll be able to walk into a perfectly temperature controlled environment without having to keep the heat on all day.

Automatic thermostats can come with other great features as well. For instance, you can set them up to maintain different temperatures in different parts of your home. That way, your home comfort system doesn’t have to work harder to keep your whole house warm or cool when only part of it is in use. And when your home comfort system is working less and using less energy, it will last longer so you won’t have to pay for repairs or a new system nearly as frequently as you might otherwise.

You’ll also pay less on your monthly energy bills the whole time, adding up to a great deal of savings. It might never have occurred to you that a new thermostat could save you so much money, but with all of these benefits, it’s definitely worth looking into.

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What Do the Energy Stars Indicate?

May 11th, 2011

If you’re in the market for any type of appliance for your home, you’ve probably come across some that boast an Energy Star certification. But what does this really mean? After all, there are all types of special labels that manufacturers put on their products to make them look better, so how can you know which ones are really worth paying attention to?

Why Energy Star Matters

The truth is that no matter what type of appliance you’re looking for, from a coffee maker to a new furnace, buying one with the Energy Star label is definitely a good investment. This certification is conferred by the Environmental Protection Agency (EPA) and it can only be used on products that pass the EPA’s stringent tests for energy efficiency and environmental impact.

Energy Star products create fewer pollutants like greenhouse gasses because they use less energy to get the job done than their inefficient counterparts. This is great for our planet, but it also translates to savings for you as a consumer. Because Energy Star appliances use less energy to heat or cool your home or do whatever else you need them to do, your monthly bills will be significantly reduced.

Quality and Performance Measured

And you don’t have to worry about inferior performance as a result of increased energy efficiency either. Energy Star products can only receive the label if they provide all of the features you’ve come to expect from comparable products across the board. They need to maintain high energy efficiency ratings while still maintaining a superior level of performance.

While it’s true that you may wind up paying a bit more for an Energy Star product, that is only a one-time cost. If you compare the monthly savings you’ll receive by using your Energy Star appliance on a regular basis to what you would pay out over time with a less efficient model, it’s easy to see how the Energy Star product costs you less.

For all of these reasons, the Energy Star rating is definitely worth looking out for when shopping for home appliances and equipment. These products are made to be reliably energy efficient and can save you a ton over the years as long as they’re properly cared for.

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What Is LEED Certified?

May 9th, 2011

If you’ve been looking into purchasing a home or having any type of major construction done, you may have run across the term LEED Certified. Of course, contractors boast of so many certifications these days that it can be tough to tell which you should pay attention to and which you shouldn’t. But the LEED certification is definitely one that’s worth taking into account when you’re choosing a contractor and planning out your project.

The Benefits of LEED Certification

LEED stands for Leadership in Energy and Environmental Design. The standards and guidelines for obtaining LEED certification were put together by the U.S. Green Building Counsel in order to improve construction practices and help buyers find property that meets higher standards in a variety of environmentally significant categories.

For instance, a LEED certified home boasts better water and energy efficiency than the average home that is not LEED certified. It also was put together using techniques designed to reduce carbon dioxide emissions and improve indoor air quality, making it both the healthy choice for you as the consumer and the environmentally responsible one.

When you purchase a LEED certified home, you’re not just helping the environment either. You’re also helping yourself in a variety of ways. That’s because a home that meets LEED certification standards for energy and water efficiency will help you generate smaller energy and water bills each month. That translates to huge saving over time, so even if you pay a bit more initially for your home, you’ll get that money back many times over as time passes.

LEED certification isn’t just something you should pay attention to when you’re buying a new home. Any construction project you undertake for your existing home can also benefit from these guidelines and standards. For that reason, it’s worth seeking out a contractor who can provide services in line with LEED standards. These types of improvements and techniques need to be incorporated in your home improvement project from the initial planning stage, and a contractor familiar with LEED standards will have no trouble doing just that.

You can also have confidence in the contractor you pick if they carry LEED credentials because they’re not easy to get. Anyone who is LEED certified has put a lot of time and energy into obtaining those credentials and is likely just the type of contractor you’d like taking care of your next home improvement project.

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Evaporative Coolers

May 6th, 2011

If you’re looking for an effective alternative to a traditional air conditioning system for your home, an evaporative cooler is a great option to investigate. This is not new technology by any means, but evaporative coolers are rapidly gaining popularity these days for several reasons. While these aren’t the perfect solution for every home, they’re definitely worth taking a closer look at if you’re interested in cutting your cooling costs.

Here are some of the benefits of evaporative coolers:

• Energy Efficiency – Because they cool air through evaporation, evaporative coolers use much less energy than traditional air conditioners to achieve the same results. This will take a big chunk off your energy bills each month.

• Competitive Pricing – You can buy just about any size evaporative cooler for less than a comparably sized air conditioner. And just like air conditioners, evaporative coolers are available in a wide variety of sizes so you should have no trouble finding one to fit the space you need cooled.

• Easy Installation – Whether you opt for a smaller window unit or a larger centralized one, evaporative coolers are at least as easy to install as air conditioners if not more so. The smaller units are made to fit into windows just like a comparably sized air conditioner, and central evaporative coolers operate through the same air ducts as your central heating system. They’re easy to integrate into your home and often less labor intensive than a central air conditioner to install.

• Complete Air Circulation – With an air conditioner, you need to have your windows and doors sealed up tight to keep the cooled air from escaping. But because evaporative coolers work by cooling outdoor air as they bring it into your home, they require other doors and windows in the house to be open to function efficiently. As the evaporative cooler blows cooled air into the house, it pushes hotter air out, leaving you with a comfortable environment and a constant supply of fresh air.

Of course, evaporative coolers aren’t the right choice for every situation. They work extremely well in areas with hot, dry climates, but they have a harder time cooling your home when the air outside is hot and humid. They also require water to keep their cooling pads moist, and if you live in an area where drought conditions are common, it may be difficult to keep up with their water consumption.

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Why Install a Ductless Air Conditioner?

May 4th, 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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What Will an Energy Audit Do?

May 2nd, 2011

With costs constantly on the rise, homeowners are looking for new ways to save money on their energy bills, such as conserving electricity, using less heat and exploring alternative energy sources. One great way to see how you and your family can use energy more efficiently is to get a home energy audit.

The goal of an energy audit is determine how energy is being used in the home in order to identify and correct any inefficiency. By finding ways to use energy more efficiently, you can reduce the energy used in your home without sacrificing comfort. Efficient use of energy reduces costs and environmental impact.

How It Works

To conduct an energy audit, a professional will use special instruments to inspect various aspects affecting energy use in your home, including construction, occupancy, appliance use, number of windows and doors, and so on. In this way, you can see how well your home is retaining heat and note any places where inside air may be escaping, making your home cooler or warmer than desired. For example, since a lot of heat can be lost through them, upgrading windows and skylights is an inexpensive way to gain a lot in terms of efficiency. Making sure windows are properly sealed, repairing worn weather stripping, and installing new windows with energy efficient certifications (such as LEED or Energy Star) are simple but effective first steps to making your home more affordable and eco-friendly.

Another aspect of energy audits includes prioritizing energy needs in order of importance, in order to reduce the use of energy on less critical functions. This may include collecting data on the local climate and past energy use. This data can be analyzed in order to identify and predict times when higher usage may be necessary, so that you and your family can prioritize according to your budget. For example, if the results of your energy audit show that July is historically the hottest month of the year and the month when you use the most electricity, you can make up for increased cooling costs by using other electrical appliances less. This way you can stay cool without going outside your utility budget.

Other solutions stemming from your energy audit may include installing insulated curtains, unplugging “vampire devices” like cell phone chargers, and avoiding the use of large appliances during warmer times of the day.

If you are one of the many interested in cutting energy costs, while helping the environment, a home energy audit is the first step.

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