What Is an HVAC System?

HVAC Round Rock stands for heating, ventilation and air conditioning. These systems regulate temperature, humidity and air circulation to create a comfortable and healthy indoor environment.

HVAC

Choosing an energy-efficient HVAC system is the best way to maximize your energy savings. Look for ENERGY STAR certification and consider features like smart thermostats for greater control.

The air conditioning system in an HVAC system removes heat and humidity from indoor spaces to keep indoor temperatures cool and comfortable. It does this by transferring the heat from inside to outside where it can escape through vents and ductwork. Air conditioners use a lot of energy to operate and can significantly increase your energy bill. However, you can minimize its effects by upgrading to ENERGY STAR certified equipment and by making sure your home is properly insulated.

The components in an air conditioner consist of a compressor and two heat exchangers—one called the condenser and one called the evaporator. The compressor raises the pressure and temperature of the refrigerant liquid by running it through a coil. The hot liquid then enters the evaporator, where it evaporates, cooling the air inside a house. The cooled air is then pushed through the house by a fan and circulated in ducts. The refrigerant then returns to the compressor, where it goes through the heat exchanger again and repeats the cycle.

A common type of air conditioner is a split system, with separate indoor and outdoor units. However, you can also find packaged systems that combine the indoor and outdoor air conditioning parts into one unit.

In the past, most air conditioners contained CFCs and HFCs, which are harmful to the environment. These chemicals deplete the ozone layer and are believed to cause climate change. The ozone layer protects the Earth from ultraviolet radiation, which can damage living cells and lead to cancer. We have since replaced these chemicals with safer alternatives, but older air conditioners may still leak them. Fortunately, we are slowly eliminating the problem of air conditioners leaking these chemicals by repairing them and replacing them with newer models that have no such gases in them.

An air conditioning system that is properly sized for a home will save money on both heating and cooling. However, many existing air conditioning systems are too large for their homes. A simple upgrade to a smaller, ENERGY STAR certified system can cut energy consumption by up to 20 percent.

Furnace

A furnace works by burning fuel to heat your home and often comes paired with an air conditioner as part of a complete HVAC system. Depending on the type of furnace, your system could use natural gas, propane or oil. You can determine the fuel source by looking at your furnace and checking for a data sticker located on or near the front panel, which should also contain a model number.

With a natural gas forced-air furnace, a blower pulls air into the heating system from your home’s rooms through ductwork. The air passes over a heat exchanger, which is usually made from hollow metal tubing or thin aluminum sheets pressed together. The heat from the fuel reacts with the air to generate heat that warms your home, while flue gases are vented through a stack that extends through your roof or side wall.

The fossil fuels used by traditional furnaces produce carbon dioxide and other greenhouse gases (GHGs) during combustion. These gases are a major contributor to climate change by trapping radiation in the atmosphere, raising Earth’s temperature. The extraction and transportation of fuels for furnaces can also have negative environmental impacts, including habitat destruction and water pollution.

High-efficiency furnaces offer the potential to cut back on energy waste and reduce your home’s emissions of GHGs. This technology helps ensure that the same amount of heat is generated with less fuel, which can lead to lower heating bills over time.

In addition, high-efficiency furnaces may be eligible for energy efficiency rebates that offset some of their upfront cost. You can minimize your HVAC’s impact on the environment by choosing an efficient furnace and ensuring that it is properly maintained.

Another alternative to traditional furnaces is a heat pump. Heat pumps operate much like air conditioners, but they use refrigerant rather than gas to control both heating and cooling. Like furnaces, heat pumps are boxy units that can be found outside your home. The cooling mechanism works the same way as air conditioners, but they are capable of both heating and cooling your home by using different mechanisms.

Ductwork

The HVAC system uses ductwork to circulate clean air around homes, commercial buildings and other indoor spaces. It’s a vital part of the system, but over time, it can become clogged with dust and pollutants, negatively affecting indoor air quality. Regular duct cleaning is crucial for maintaining good indoor air quality.

An air duct has two major sections: the return and supply. The return ducts bring unconditioned air into the furnace to be conditioned, while the supply vents send conditioned air throughout the home. Ideally, these ducts will be properly insulated to maintain the right temperature. However, improper installation or lack of maintenance can lead to leaks and poor air flow efficiency.

Typical ductwork is made of galvanized steel or aluminum and can be round, oval or rectangular. They’re designed for durability and can withstand the elements. However, they can rust or develop cracks over time. Sheet metal ducts are easy to clean, durable and rustproof, but they can be more expensive than other options. They also require routine cleaning and maintenance to prevent the buildup of dirt, mold and other debris.

Other ducting options include fiberglass ducts, which are less expensive than sheet metal and come pre-insulated. They can be damaged by heat and moisture, but they’re easier to maintain than other duct types. Moreover, they’re more resistant to fungi, bacteria and mold growth. Polyester fabric duct hoses are another option, which are durable and customizable to meet specific needs.

Dirty ductwork can cause serious health problems for homeowners. Inhaling pollutants trapped within the ducts can trigger respiratory problems and exacerbate existing ones. They can also make people feel dizzy, nauseous and fatigued. In extreme cases, contaminated ducts can even lead to serious illnesses and death.

One of the best indicators of a bad air duct is musty odors, which indicate mold or mildew growth. If you notice musty odors in your house, it’s important to call an HVAC professional immediately. Otherwise, the mold will spread throughout your entire house and affect your health. In addition to mold, musty odors can also signal a leak or damaged duct.

Filters

Filters help your HVAC system work as designed by trapping dust, dirt and other contaminants. They also improve indoor air quality by keeping particulates like dander and pollen from circulating in your home’s ventilation. But when filters become dirty and clogged, they can restrict the flow of conditioned air, making your home uncomfortable and reducing your system’s efficiency and lifespan. Dirty filters also lead to costly repairs and may even cause damage to your blower fan or ductwork.

There are many different types of filters on the market, with different levels of filtration suited to various household needs. For example, allergy sufferers should choose a filter with a high MERV rating to reduce allergens like pet dander. Families with young children should opt for a filter that’s good at removing airborne bacteria and viruses.

Basic fiberglass filters are affordable and easy to install. They usually have a low MERV rating of 1 through 4, meaning that they only catch larger particles and allow smaller particles to pass through, but they’re adequate for most homes and offices. More expensive, pleated filters are more effective at catching smaller particles. However, they aren’t compatible with all systems and create more resistance to airflow, which can strain some units.

Regardless of the type of filter you choose, it’s important to keep track of when to change them. Ideally, you should replace your filter monthly during summer and winter (during peak demand periods). You’ll find the filter located next to or inside your system’s blower fan, or in a return vent in the ceiling or wall.

If you have a hard time remembering when to change your filter, ask your technician for advice. A professional with the right tools can take a measurement in just a few minutes, and they’ll advise you on how often to replace your filter based on your equipment and environmental factors. For instance, if your home is close to construction sites or you have a lot of pets, it’s a good idea to change your filter more frequently than usual. This is because all that dust and debris will be sucked into your system, taxing it and causing it to run less efficiently.

Furnace Repair Tips You Can Do Yourself

If your furnace starts leaking, making loud noises, or not heating the house well, it’s time to call a professional. However, check the power switch directly connected to your furnace before calling for service. It must be flipped up and not tripped to provide the energy supply necessary for heating.

Furnace Repair

The thermostat is the most essential component in your furnace and is also one of the easiest to fix. If the thermostat fails to turn on your furnace or doesn’t do so promptly, there are a few things you can check first. Contact Furnace Repair Cincinnati for professional help.

The most obvious is to make sure the thermostat is on and set to HEAT. It can be easy to accidentally flip this switch off while doing something else, or the switch may have been shut off by an electrical surge or power outage. You should also check your home breaker box to see if there are any tripped breakers or blown fuses that could be keeping your furnace from turning on.

Another possible problem is dirty or faulty temperature sensors. If a thermostat sensor is contaminated with dust or has electrical problems, it will be difficult to read accurately and can trigger short cycling, which wears down your furnace and reduces energy efficiency. Similarly, a thermostat that isn’t placed in a good location, such as being near a fireplace or other heat sources, can have the same effect.

Finally, if the ignitor isn’t heating up gas to warm up your air, you may need a replacement for this essential part of your furnace. A weak flame is an indicator that there is a larger problem with your furnace and should always be addressed. Leaving it to worsen can lead to costly repairs down the road. Luckily, a simple inspection and cleaning of your furnace can help keep your heating costs low. This is a great task to include in your annual maintenance plan. If you do need a replacement, an HVAC professional can handle the job quickly and affordably.

Gas Valve Issues

The gas valve opens and closes based on signals sent from the thermostat to allow or prevent natural gas into the burner chamber. Over time, dust and debris can accumulate within the gas valve mechanism and affect its performance. Cleaning the movable parts inside the gas valve can help improve its functionality and extend its lifespan.

In addition, the electrical components within a gas valve can become worn out over time and disrupt its proper functioning. Issues such as damaged or frayed wires can result in erratic ignition sequences and the inability of the valve to open and close properly. These issues can also cause a furnace to continuously cycle on and off instead of reaching set temperatures.

If you suspect that your gas valve is faulty, the first thing to do is turn off the gas supply to your home. This step will ensure that no flammable gases enter living spaces and prevent potential accidents during the troubleshooting process. You can also use a multimeter to check the voltage going to the gas valve to see if it is getting power.

The next step is to determine what is causing the malfunctioning of your gas valve. This could be as simple as a tripped breaker switch or a bad gas connection. It could also be a sign of other problems, like a broken thermocouple or a system that is oversized for your home.

The gas valve is an important component of your heating system that controls the flow of flammable gases throughout your home. While there are many DIY projects that you can confidently take on around your home, working with a gas valve requires strict safety precautions to avoid potentially dangerous scenarios such as a gas leak.

Burner Issues

If your furnace isn’t blowing hot air, it’s possible the flame sensor has become coated in residue over time and no longer detects a flame. This can cause the system to shut off when the thermostat tells it to heat up. Inspect the flame sensor regularly and clean it as needed.

A damaged limit switch may also deactivate your furnace. This switch helps the system avoid damaging itself by detecting when its interior temperature reaches unsafely high levels. If the limit switch has been damaged, it will need to be replaced by a professional.

Another common problem with a forced-air system is the blower motor not working. The blower motor moves the warm air from the heater through your house in ducts and distributes it throughout the home. If the blower motor stops working, your entire heating and cooling system will stop working. If you have a belt-driven blower, inspect the drive belt to make sure it’s not cracked or frayed.

You should never ignore any issue with your furnace. Even if you suspect the problem is minor, it’s important to take note of any symptoms so that a specialized technician can diagnose and fix the problem quickly.

If you smell natural gas, turn off your furnace and open windows. It’s possible the system has a leak and is releasing dangerous carbon monoxide into the home. You can call your local natural gas company for a repair man. To determine if the problem is serious, the service man will test for carbon monoxide using a special sensor called a carbon monoxide detector. This will detect carbon monoxide in the air and will emit a strong, distinctive rotten egg odor when it is present.

Drain Line Issues

The unique design of a furnace allows condensation to drain away through the condensate line and into a drip pan. When this drain line becomes clogged, it can cause leaking around the furnace base and water damage throughout your home. Clogs can be caused by dirt, debris, algae growth, and slime buildup. Professional drain line cleaning can prevent future clogs and ensure that your system is functioning properly.

A clogged condensate drain line is often a sign of other problems with your system, such as a cracked heat exchange or blower motor. The best way to avoid costly repairs and protect your investment is by scheduling routine maintenance with a professional HVAC technician.

This will help to ensure that your system is operating properly and that your air filter is clean. Dirty filters can restrict airflow, causing your furnace to work harder and wear down faster. This can lead to an overheated and cracked heat exchange, which can ultimately cause a carbon monoxide leak in your home.

During routine maintenance, your HVAC technician will check the drain line for signs of clogs. Clogged lines are usually caused by dirt, algae, and debris buildup. Regularly checking the line with a wet/dry vacuum can help prevent clogs and reduce the risk of water damage to your home.

If you have an older furnace that is nearing the end of its lifespan, it may be a good idea to replace it instead of repairing it. A newer furnace can be more energy efficient and save you money in the long run. However, it is important to consider the extent of the damage and the upfront costs when making a decision.

Electrical Issues

Furnaces use electricity to heat homes, and any issues with that electrical system can cause problems for your heating equipment. However, you can usually resolve these issues yourself if you know how to troubleshoot them. The first step is to check that your furnace has power. You can do this by checking the circuit breaker or fuse box to make sure that the switch hasn’t been flipped off. The next step is to remove the cover from your thermostat and make sure that there are no loose wires. Loose wires can lead to a short circuit, which will stop your furnace from working. You can also look for signs of a burnt out thermostat or circuit board, which is usually caused by static electricity that builds up on the electrical components and causes them to overheat. If you see that your thermostat is burned out, it’s a good idea to call in a professional for an inspection and repair.

Lastly, you can also check for a bad starting capacitor, which is the electrical component that’s responsible for putting a power surge into the blower motor to start it up. If it fails, the blower motor won’t run, and you’ll need to replace the capacitor with a new one.

If you’re still having issues, you can also try to reset the thermostat and turn it back on. This can often fix the problem by ensuring that your heater is actually plugged in. If the issue persists, you may need to call in a professional for an electrical inspection and repair. They can check your electrical wiring for faulty connections, and they can also determine if the circuit you’re using is adequate for the load of your furnace.