How to Maintain your HVAC System

St Louis, MO HVAC | ControlledHVAC.comThere are certain steps you can take that will ensure your HVAC works properly and efficiently. Most of them take very little time and can save the cost and hassle of a repair. In addition to these steps, you need to have a professional come out to service and maintain your system once or twice a year. A heating and air conditioning company can schedule your maintenance or put you on a maintenance contract.

Change the Filter

This is a cheap and quick step to take and yet it is very important. If your filter is dirty, your indoor air will get dirty as will the inside of your HVAC system. Also, your equipment will have to work harder to get the air through and that can wear it out faster. This means more repairs or replacement earlier. Also, when your system works too hard, it will use more power and cost more money to operate.

Outside Maintenance

  • Clear the area around your unit and leave a 2 foot clearance. Remove any leaves, twigs, pollen, grass clippings or other debris from the top and sides of the unit.
  • Check the refrigerant line for signs of damage.
  • Ensure that the unit is level and on sturdy ground or a pad.

Inside Maintenance

  • Check all air registers to make sure they are clean and not being blocked with debris.
  • Remember to never close more than one fifth of the registers as that will put a strain on your HVAC system.

Contact us to learn more about our exceptional St Louis, MO HVAC services.

FAQs About Furnace Filters

Heating St Louis Missouri | ControlledHVAC.comYour home furnace is an expensive investment and is something that you and your family rely on. A properly working furnace is important for heating in St Louis, Missouri during cold winters. One very important and yet inexpensive part of your furnace is the air filter, so here are some frequently asked questions about furnace filters.

How Often Should I Change the Filter?

The answer depends on the type of filter you buy. Cheaper filters need to be changed out monthly and more expensive ones can go three months. The ones that cost more are pleated, which increases the surface area so they can keep the air clean longer.

Why Is a Clean Filter Important?

All the warm air that circulates throughout your house passes through the filter so if a filter is dirty, your indoor air quality will be affected. Also, a dirty filter will make your furnace work harder and this can shorten its life, meaning money for repairs or replacement. Lastly, if your furnace is working too hard, it will be less efficient, so you can save money on your utility bills if you change your filter regularly.

What Is MERV?

You can determine the efficiency of the filter by checking the MERV rating. If the rating is higher, the efficiency is better. That is a rating system used in the HVAC industry where a number from 1 to 16 gives the Minimum Efficiency Reporting Value. It basically measures the size of particles in the air that are captured by the filter. High numbers mean better filtration but that also means your furnace has to work harder to push air through it. When deciding on the MERV rating you need, always check with an HVAC professional or the manufacturer to choose the best filter for your furnace.

Why Add Radiant Heat Systems to Your Floor?

hvac st louis mo Radiant Heat systems are a wonderful option when looking to heat your home. Whether you want to add them throughout the home or in just one area, you are sure to love the results. There are plenty of benefits to the system, but here are a few favorites:

Added comfort throughout the home. Radiant Heat systems distribute heat from the ground up. So the minute your feet hit the floor, you’ll be warm.

It’s totally efficient. These heating systems work on very little electricity or gas to operate. This makes them a cost-efficient addition to any existing systems in your home.  Also, Radiant Heat systems run quietly, so no noises like other heating systems. Working together, they give a safe and cozy way to stay warm.

Perfect for allergy sufferers. Those who have allergy issues or have problems when it comes to air quality usually suffer more with traditional systems. These systems use vents that bring in and move dust and other particles around the home whenever in use. Radiant Heat systems don’t use vents, so no additional dust or allergens moving throughout the home.

There are many options when it comes to heating your home and Radiant Heat systems are a great way to go. If you have more questions about our hvac, st louis mo services or just want more information about Radiant Heat systems, feel free to contact us! Controlled Heating & Air Conditioning would love to help you find the system that is best for you, your family, and your home!

Product Spotlight: iComfort S30 Smart Thermostat from Lennox

Our smartphones let us do almost anything now. Everything from keep in touch with family members, pay bills, even order take out. But did you know you could also control your home’s thermostat from your phone? You can now! Check out the iComfort S30 Smart Thermostat from Lennox and see what new things this thermostat can do!

Walk in the door and be comfortable. The iComfort S30 uses your smartphone’s location to see where you are and base a schedule off of it. It learns your daily routine and changes the temperature to best fit your home’s needs. This way, you save energy and have the temperature set at what you really want when you come home.

Get a more accurate temperature. This thermostat takes into account the temperature outside and inside, giving you a “feels like” temperature rather than a static number. Also, you can check the thermostat panel for updates on the weather and air quality.

Be aware of problems before they happen. The iComfort S30 will tell you when you are having problems with your system. It will even diagnose what the problem is. This way, you can tell your service expert what’s going on and solve the problem without extra service calls.

For more information and to see if the iComfort S30 would be a good addition to your home, check out our site We’ll be more than happy to help you decide what soluition is best for your home! We’ve been St. Louis MO HVAC specialists since 1977!

Know Your HVAC Equipment: Signs Your AC Needs Repair

Air conditioning in St Louis MissouriYour heating and air condition equipment does more than just heat your home or apartment in winter and keep it nice and cool during the summer months. It creates a space that you want to be in. There is nothing worse than having your heating or cooling shut off during the hottest and coldest months of the year.

Instead, keep that personalized comfort in top shape by making sure that you know your equipment. This means you need to know how old your equipment is; how many repairs have already been done to it and if you still have warranty on it. Controlled Heating and Air conditioning in St Louis Missouri has been serving customers for nearly forty years and recommends that you get your air conditioner checked to ensure that it is functioning correctly before summer hits.

Here are a few signs that your air conditioner may need repairs:

Your air condition has been or has started making excessive noises. This is one of those tell-tale signs because air conditioners are created to run quietly and efficiently. If it starts making noise it may mean it has loose parts that need to be tightened up, or that it needs to have repairs done to the motor.

You have poor air flow or weaker air flow coming through the vents. When this happens, the air conditioner’s compressor is failing and will need to be repaired immediately.

Lack of cool air is also a sign that the compressor isn’t doing its job. If you have no cool air at all, then you need a serious repair done.

Other signs may include strange odors, thermostat problems and moisture where there shouldn’t be. If your air conditioning in St. Louis Missouri is having any of the above signs, then you need to get it checked out.

Strange odors usually mean that the wiring insulation has worn down, or that you may have mold which could be caused by moisture where there shouldn’t be or an issue with your ductwork.

Finally, if you are noticing excessive dust or your energy bill is rising, then it’s time to get your unit looked at.

Facts About Indoor Air Quality

blogThe air inside your home can be more polluted than outside air. This is due to houses being more airtight and containing chemicals, gases, smoke, and germs. A company that sells purification systems, like Pure Air, in St. Louis can give you more information on how they can clean your air and keep it clean.

Contaminants in the Air

Here is a list of common contaminants and some of their sources:

  • Toxic gases like formaldehyde from building materials
  • Fiberglass from building materials
  • VOCs (volatile organic compounds) from paint, cleaning products, pesticides, disinfectants, and glue
  • Gas emissions from carpet and furniture
  • Dust mites from rugs, curtains, and upholstery
  • Bacteria, mold and fungi from damp places, or stagnant water
  • Carbon monoxide from car exhaust, heaters, or tobacco smoke.

Reasons to Purify Your Air

Contaminated indoor air can pose health risks to members of your family and pets. Here are some of the health problems than can be caused by poor indoor air quality.

  • Allergies
  • Respiratory problems
  • Sneezing and coughing
  • Dizziness
  • Nausea
  • Headache
  • Fatigue


A filter is placed in the air flow of heaters and air conditioners to clean the air. Pleated filters have more surface area so they are better at cleaning the air. HEPA filters will filter out very small particles in the air and are considered high efficiency.

Photocatalytic Oxidation (PCO)

This type of air purifier makes ions, or charged particles. It creates an electrical field called a corona discharge. When larger molecules pass through, they pick up an electron and become ionized. Then, these molecules stick together, making them heavier, and settle out of the air.

UV Light

Germicidal lights use ultraviolet radiation to stop the growth of airborne microbes, like mold, viruses, and bacteria, by sterilizing them so they can’t reproduce. A UV light system continues to operate even when the heater or air conditioner is not on.

Is It Time to Replace Your HVAC System?

air conditioning in St. Louis, MissouriMost homeowners don’t think about their HVAC system until it breaks down or is obviously not working properly. It is important to have expensive equipment checked out regularly to ensure it is working properly and efficiently.

At some point, your HVAC system will need to be replaced and sometimes it is hard to determine when this should be done. For those of you who have heating and air conditioning in St. Louis, Missouri, here are some ways to know it is time to consider replacing your system.

System Is 10 Years Old

Even though a system usually can run for 15 to 20 years, after 10 you need to consider replacing it. A newer model will be more energy efficient, which will save money on energy bills, operating costs, and maintenance. Repairing an older unit doesn’t guarantee that its life will be extended. Making the investment and upgrading will give you a system that will last for many years. Also, there are incentives and rebates that can help sweeten the deal.

Repair Bills Adding Up

If you are repairing the system often, then you need to consider replacing it. You need to realize that an older system that needs repairs is probably running less efficiently, costing even more money. Over time, major repairs and emergency fees can be almost as expensive as replacing the unit.

System Runs a Lot and Is Noisy

Either one of these can point to a system that is nearing the end of its life. The noise you hear can indicate a major problem, like the indoor coil. A system that runs more often than usual is using a lot of energy and working harder than it should.

Comfort Level Changes

If your home seems muggy, your system is not operating properly. If some rooms are too cold or too hot, this can also show a problem. If your system is old and not regulating the temperature, consider replacing with a new, efficient unit.

Prompt Boiler Replacement Services

1Dealing with high utility bills is frustrating but there is an answer for individuals who own old or inefficient boilers. Controlled Heating & Air Conditioning, Inc., your source for heating in St. Louis, Missouri, is proud to provide you with new boiler installation services. Whether you have an old boiler or the boiler you have just isn’t working properly, we are able to come to your location and install a new boiler for your needs.

Anyone who has installed a new boiler in their home has seen the results nearly immediately. In addition to noticing that their home was very warm, newer boilers are far quieter when compared to the old selections. Additionally, they do not spread allergens through your home – this is great news from anyone who suffers from seasonal allergies. Many new boilers are far more affordable than other heating services and, when properly serviced, can last as long as 30 years! From gas selections to electric boilers, our business has a wide array of options from trusted manufacturers for your home.

Contact us at (314) 638-1535 or (636) 296-2627 to inquire about having your boiler replaced today. We are ready to serve people throughout St. Louis and the surrounding communities.

5 Ways to Improve Your Indoor Air Quality

2Indoor air quality is one of those things you don’t usually think about until it starts to become an issue. However, if you or a family member suffer from respiratory ailments, the quality of the air you breathe is extremely important. With St Louis, Missouri HVAC repair and installation, it’s possible to have high indoor air quality. The following are five ways an HVAC professional can help.

Air Filters

High-efficiency air filters such as carbon, HEPA, and Lennox PureAir filters remove pollen, dust, dander, and even microscopic pollutants from the air, performing far better than the average store-bought filter.


During the winter, heating your home causes the air to become very dry. Cold and flu viruses thrive in dry conditions so ensuring the air in your home has enough humidity is essential to good health. Modern humidity systems are thermostat-controlled and don’t need to be filled with water.

Comfort Controls

Imagine being able to control your home’s temperature from wherever you are, even if it’s at work or on vacation. Now you can with Wi-Fi enabled, remote thermostats. Today’s responsive thermostats can also be set to control humidity levels as well as temperature and even energy usage.

Zoning Systems

These systems allow you to heat or cool each room of the house as necessary. This helps save on energy bills as rooms that aren’t occupied don’t have to be heated or cooled as much as rooms that are. Zoning systems also help create consistent temperatures in your home throughout the year, regardless of weather.

Germicidal Lights

When you cough or sneeze, the resulting particles can stay airborne for long periods of time. Germicidal lights kill the airborne pathogens that air filters just can’t eliminate.

These methods of indoor air quality control will have you breathing easier and enjoying high indoor air quality in no time.

5 Signs Your Home Needs a New HVAC System

1Spring has barely sprung but now is the time to start thinking about your heating, ventilation, and air conditioning (HVAC) system. Having air conditioning in St Louis, Missouri during the summer is a must, so if you’ve been experiencing any of the following, it’s time to replace your HVAC system:

Uneven Temps Throughout the House

If some rooms are too hot and others are too cold, it’s a sign your HVAC system isn’t working properly. A new system will provide consistent temperatures — and comfort — throughout your home.

Excessive Dust

While this may simply be a sign your filters need changing, it can also mean your system isn’t filtering air properly and your indoor air quality is suffering because of it. Make sure to check your filters once a month, cleaning, and replacing them as needed. If that doesn’t alleviate the problem, you need a new HVAC system.


Your HVAC system should never make noise. If you’ve gotten familiar with the clanks and clunks of your system, it’s high time to let go.

Problems With Humidity

If your iced tea glass is sweating more than you are, it’s definitely a bad sign. Excessive humidity can lead to mold and other problems so it’s important to replace an ailing system with one that will help keep humidity down and air quality up.

Rising Energy Bills

One of the biggest indications your system is no longer energy efficient is a rise in your energy bills. If your bills have been steadily increasing, a new system is in order and will actually lower your monthly energy costs.

Of course, if the system is more than 10 years old, is often in need of repair or the warranty has expired, it’s also time to replace your HVAC.