Carney Plumbing, Heating & Air Conditioning Blog

How to Stay Affordably Cool This Summer

June 6th, 2011

Putting in a high quality, energy efficient air conditioning system is a great step to take when you are trying to keep your house cool and comfortable all summer without paying a fortune in cooling costs. Many of the latest air conditioners are able to use very little energy to provide powerful cooling power to your house no matter how big it is.

But if you are really serious about keeping cool and keeping costs down, there are plenty of other things you can do to give your air conditioning system a hand. It might seem silly, but putting in a little bit of effort around the house can save you quite a bit in the long run.

For instance, since you are paying to keep the air in your house cool, it is a good idea to make sure that the air you are cooling stays in your house. Sealing off unused doors and windows with plastic is an excellent precaution to take to ensure that no cooled air leaks out through the cracks and door jambs. Also, you will want to check for any other openings that could create a draft and allow cool air to escape or warm air to get in.

However, just letting in air from outside in the summer is not the only way that the heat can get in. The sun is powerful in the summer and the more you can block of it, the cooler your house will be. So make sure that your blinds are closed to block out the sun, particularly in the afternoon. Morning sun is not nearly as powerful as the sun you get towards the middle and later part of the day.

All of these steps will help to take the pressure off of your air conditioning system and allow it to get its job done with a minimum of energy expended. And that will certainly save you money every month. You can save even more, though, by adjusting the temperature on your thermostat a bit as well.

Most air conditioning systems are set to a default temperature of 72°F. While this is probably quite comfortable for you, it is likely that you would be equally as comfortable at 75°F. In fact, you probably will not even notice the difference. But that small adjustment can actually save you quite a bit on your monthly cooling bills.

How Do I Find the Right Size Unit for My Room?

June 3rd, 2011

When buying an air conditioner, there are a lot of things you need to take into account. One of the most important is the size and power of the unit you choose. Air conditioners come in many different sizes, so if you really want to get the most out of your purchase, you need to do your research and pick one that fits your home like a glove.

Square Feet and BTUs

The best way to determine how large of an air conditioner you need is to match the number of BTUs the unit has to the square footage of the room you want to use it in. That means you need to know what room you’re buying it for before you make your purchase.

The number of BTUs needed goes up proportionately with the room size, so even if you don’t have exact measurements or if your room is oddly shaped, you can get a good idea of how large an air conditioner you need. For instance, a 400 to 550 square foot room is best served by an air conditioner with between 8,000 and 11,000 BTUs, while a room that’s only 250 square feet would probably be fine with a 6,000 BTU unit.

Bigger Isn’t Always Better

One of the most common mistakes people make when buying an air conditioner is to assume that the bigger the unit the better it will work. The truth is that buying an air conditioner that’s too big for your room is just as much of a waste as buying one that’s too small.

A larger air conditioner will cost more, and it will probably make the room too cold. It will also cycle on and off more frequently than a properly sized unit and it won’t be able to properly control the humidity level, leaving you with a cold, damp environment. That’s not very comfortable.

Other Factors

The square footage is definitely the most important piece of data you’ll need before buying a new air conditioner for any room in your house. But don’t forget to take some other factors into account as well. For instance, if the room has particularly high ceilings or receives a lot of direct sunlight, you’ll probably need a slightly more powerful unit than the straight square footage would indicate.

If you’re not sure how certain features of your home will impact your buying decision, call a professional who can help you get a more exact idea of what it will take to stay cool.

What Features Should I Look for When Buying an Air Conditioner?

June 1st, 2011

There are so many different types and styles of air conditioners on the market these days, it can be difficult to figure out what features are worth paying attention to when it comes time to buy one for yourself.

Of course, the most important thing to do is make sure you get an air conditioner that’s appropriately sized for the space you’re trying to cool. But what should you look for beyond that? Here are a few features you might like to have on the unit you purchase:

Energy Efficiency – The more energy efficient your air conditioner is, the less your cooling costs will be. It’s as simple as that. So when you’re evaluating devices, remember that it’s worth paying a little bit more up front for a more energy efficient unit. It will save you money in the long run and you’ll be doing your part to help the environment.
Dehumidification – Just about every air conditioner controls humidity to a certain extent in addition to cooling. But some do this better than others. There are also air conditioners with separate dehumidification settings for those days that are more humid than hot. Even when you need both cooling and dehumidification, it’s nice to have control of each of these independently.
Timer – Being able to program your air conditioner to switch on and off at different times of day is more than just convenient; it will save you money. You don’t want to leave your air conditioner running all day when you’re not home, but it sure is nice to come home to the comfort of an air conditioned space. If your air conditioner has a timer, you can have both. Just set the unit to come on a half hour or so before you get home and you’ll enjoy cool, refreshing indoor comfort right when you get home without paying through the nose to keep your home cool when no one is there.
Easy-to-Use Controls – As simple as this one seems, you might be surprised at how inconvenient the controls on some air conditioners can be. So when you’re evaluating your options, make sure you research how easy each unit is to operate. This can definitely save you from plenty of frustration in the long run.

Air conditioners come in many different shapes and sizes. To make sure your decision works best in your home, do your research well in advance. When the summer heat kicks in, you’ll be glad you did.

How Do I Check for a Dirty Evaporator Coil?

May 30th, 2011

The evaporator coil is an essential piece of your air conditioning system. It absorbs heat from air that passes over it, and that air then travels into your home to cool it. So if your coil is dirty or isn’t functioning properly, the cooling power of your air conditioning system is diminished. Fortunately, this problem is fixed easily by cleaning the evaporator coil. You can do this on your own or have a professional come in to take care of it.

Signs of a Dirty Evaporator Coil

The most obvious sign of a dirty evaporator coil is an overall drop in system pressure. As long as you know what constitutes a normal pressure for your system, you should be able to tell if the current pressure is below that level. If it is, a dirty evaporator coil is probably your culprit. You can also check the static pressure in your system to see if that is low, but this requires specialized equipment.

Even if you don’t notice any particular signs that your air conditioning system isn’t working properly, it’s a good idea to clean your evaporator coils once a year or so. This can help prevent any larger problems from developing in the future.

Finding Your Coil

Probably the hardest part of cleaning an evaporator coil is reaching it. Unlike your condenser coil, which is located in your outdoor condenser unit, the evaporator coil is found inside near the air handler or furnace. If you have the owner’s manual, there should be detailed instructions telling you where the coil is and how to safely access it.

Alternately, you can have an HVAC technician show you what to do the next time they come out to work on your system. Whatever you do, though, make sure that power to your AC unit is completely shut off before you start working on it. Once you’ve gained access to the coil, use a brush or vacuum attachment to remove any debris or sediment you find there.

The Importance of Maintenance

Cleaning your evaporator coil is only one part of the regular maintenance required to keep your air conditioning system in good working order for the foreseeable future. There are plenty of things you can do on your own, but it pays to have a professional come out once a year or so to check out the entire system and make any necessary repairs.

What Are Limit Switches and How Do They Work?

May 27th, 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.

Freon and Load Capacity – How Are They Linked?

May 25th, 2011

If you’re like most people, you probably don’t think too much about how your air conditioning system works. All you really need to know is that when you switch on the system, your house gets cooler. But if you’re looking to purchase a new air conditioner for your home, it’s a good idea to know how to select the right one to fit the space you’re trying to cool.

Air Conditioning Basics

Air conditioners use Freon as a coolant to remove heat from indoor air and transfer that heat outside. To do this, they cycle the Freon through a closed loop of coils. When the cold Freon enters the cooling coil of the air conditioner, it absorbs heat from the air passing by, thereby lowering the temperature of the air. That cooled air can then be transferred into your home and more warm air can be cycled past the cooling coils.

Air Conditioner Sizing

The more air your air conditioner can cool at once, the larger its load capacity. In order to keep a particular space cool, an AC unit has to have a large enough load capacity to accommodate that type of air volume. A unit that’s too small will obviously never be able to keep your room cool enough, but one that’s too big will have a similar problem.

The truth is that when it comes to air conditioner sizing, bigger is not better. It’s best to simply get as good an estimate as you can of what type of load capacity is ideal for the space you’re trying to cool and stick as close to that as you can.

Load Capacity and Freon

Of course, if you want your air conditioner to cool more air at a time, you’ll need more coolant. But simply increasing the amount of Freon in your air conditioner won’t make it cool any better. Freon is simply one of many elements that contribute to effective cooling. And the larger the entire system is, the more Freon is needed.

So more Freon technically contributes to greater cooling capacity, but it’s not enough to accomplish that all on its own. There is really nothing you can do to increase the load capacity of your air conditioner once it’s in place. So for best results, make sure you pick out an appropriately sized unit the first time around.

Why Choose a Programmable Thermostat?

May 23rd, 2011

There are many types of thermostats available for your home, but which is the best for your particular needs? It depends largely on how often you are home, how many rooms you have and how people in your house use each of those rooms.

A programmable thermostat in particular is a great option because it allows home owners to control when and how much heat or cooling is introduced to their indoor air. Normal thermostats lack this level of control, largely because they are built as simple switches that flip on whenever your temperature gets too low or too high.

Situations for a Programmable Thermostat

When you leave your home every day, you have two options. Either set the heat and AC so you’ll be comfortable when you return, or turn them off completely and suffer through the first half hour or so when you get home that night.

If you choose the former, you’ll pay a lot more in energy bills to heat or cool an empty house. And if your humidity levels need controlling as well, this may be your only option. Those in the second camp are forced to endure uncomfortable temperatures right when they get home and want nothing more than to relax. Not much better.

That’s why so many homeowners are opting for programmable thermostats to overcome this issue. With a programmable model, you can actually tell your home’s comfort system when to turn on and off each day, depending on when people will be there. Imagine going on vacation for three or four days and coming home to a nice and toasty living room and a smaller heating bill to go with it. That’s the kind of control a programmable model offers.

Zone Control and Beyond

Some programmable thermostats even allow you to section your home off into zones and choose specific temperatures for different areas of the house. This allows a great deal more control over when and how your system will operate each day, depending on the individual comfort needs of your family.

If you’re making dinner and don’t want the heat blasting you while you’re standing over the stove, just set the kitchen temperature lower. And with a programmable thermostat, you can tell it to come back on an hour after you leave the kitchen so that it’s comfortable later when you need a glass of water.

How Bad Is the Air in Your Home?

May 20th, 2011

Every day you hear about another awful contaminant that can get into your home’s air supply. Radon gas. Carbon Monoxide. Nitrogen Dioxide. Smoke. Mold. The list gets longer with each passing year and many homeowners are understandably worried. However, before you run out and by the newest lineup of filters, purifiers, and UV lights, stop and think about just how bad your indoor air actually is.

When Was Your Home Built?

Homes built in the last 10-15 years tend to be well ventilated and may even have air quality systems already in place. It’s those built in the late 1970s and early 1980s that tend to have the worst ventilation (assuming they have not been updated since then).

This kind of poor ventilation can be dangerous, but usually only in that you have less fresh air and more indoor allergens and contaminants. Specifically, you’re most likely to suffer from things like pet dander, dust, pollen, and dirt in the air. On their own, these are not dangerous, but without fresh air to circulate them outside and ensure you get a steady, clean supply of air to breathe, they can make you ill.

How Bad Can It Get?

While it’s rare, some homes suffer from more advanced contaminations. The most common is mold. Mold grows primarily in dark, damp spaces. If your humidity levels get too high in the summer, the ductwork in your house is perfect for mold and it will blow the spores directly into your air, putting everyone at risk.

You should also be wary of exhaust fumes from your appliances that may not get properly removed from the house. Both of these problems can be fixed with regular duct and exhaust cleaning.

Outdoor contaminants can also make it into your indoor air. Things like exhaust and smoke, gas, radon, or other outdoor pollutants should be tested for when you setup a new indoor air quality system. There are filters and purifiers that will remove almost all of these contaminants, but they are not always required, so you should check before making a decision.

Ultimately, the odds are that your home suffers only from some stale, dusty air. But, it is very important to keep everything clean and test it regularly to make sure nothing worse develops. Poor air quality is about more than just comfort – it’s an honest health issue.

Spring Drainage Reminders

May 18th, 2011

The good news is that it’s spring time, and the dreary cold of winter is behind you. The bad news is that there’s water everywhere—a lot of it. Between the melting snow and the spring showers, the water on the ground can accumulate quickly, which can lead to problems for your home and family if it is not drained properly. Below are some reminders that can help avoid a disastrous basement flood.

Start High

Your roof is a good place to start. You should check your roof in the spring anyway, so here’s your chance to take care of two birds with one stone. Start by checking for loose or damaged shingles that may cause leaks. Repair all leaks immediately, no matter how small they seem at first. Once you have taken care of the shingles, inspect the eaves for deterioration. This can be the first sign of leakage or gutter damage.

Start by cleaning out all the gutters. They’ve had all autumn and winter to accumulate leaves and ice, so a good cleaning is vital. While you’re up there clearing out the gutters, check them for any damage—bent or broken pieces, popped rivets, etc. Make any necessary repairs. Once you are done with the roof gutters, inspect the downspouts. Make sure they are clean and free of clogs, and that you have splash blocks in place at each one to keep water draining away from the foundation.

Check the Ground

Next, take a walk around the yard, keeping an eye out for any depressed spots which may cause water to pool or drain back toward the house. Fill these spots in and seed them. As an added benefit, this will help keep mosquitoes under control. When you are putting out your sprinklers, make sure they are aimed such that they do not spray the house. The water can pool around the foundation and leak into the basement.

Repair any holes or ruts in your driveway, especially if it is gravel. This will keep water running down and off the driveway, rather than pooling or flowing back toward the house.

This may all seem like a lot. Basically there are three simple principles to keep in mind in order to keep your house safe from flooding and water damage. Repair leaks promptly, keep drainage routes clean, and water should always stay away from the foundation.

When in doubt, just keep those principles in mind, and you’ll go a long way toward keeping the basement dry.

Spring Maintenance Tips For Outside the House

May 16th, 2011

Harsh winter weather can take its toll on a home, so the warmth of spring is a great opportunity to whip the place back into shape. Finding time now to do some maintenance on the outside of your home can save a lot more time, trouble and expense down the road, as well as helping retain resale value. Below are some tips to keep your home in good repair.

On The House:

Take a trip to the roof to check for damage. Look for loose, damaged, or missing shingles, as well as any other spots that look suspect. If you have a roof that is not shingled (e.g., sheet metal), look for visible signs of damage. Replace shingles, patch holes, and make other repairs as needed. Consider having a new roof installed if damage is extensive.
Inspect roof fascia and trim for rotting, damage or deterioration.
Clean out your roof gutters. The combination of the autumn leaves and winter ice can leave them clogged and unable to properly drain. You may also find that the forces of nature have caused some breakage, so repair and/or replace any pieces that need it.
Carefully examine the seals on your windows, doors, and any protruding vents. (Reminder: when was the last time you took a look at your dryer vent?) Apply new sealant to any holes or over any spots where the sealant looks like it is brittle or degraded.

Around The House:

Trim any trees, branches or shrubs that touch the house or are beginning to dangerously encroach. Be sure to look up; winter storms may have damaged some high branches, creating a situation where roof damage is just waiting to happen. Clean up any wood debris left in the yard, as these can attract termites.
When setting up your sprinklers on the lawn, aim them away from the house. Water around the foundation can cause flooding and attract termites.
Repair any cracks, holes or loose material in your driveway. This keeps loose asphalt and gravel from getting dragged inside and damaging floors. It also extends the life of your automobile.

This may seem like a lot of work, but putting in this bit of effort up front will save you plenty more work (and expense) in the future. Plus, once you’re done, you get to put your feet up, enjoy the warm spring weather, and wait for summer to come.