frequently asked questions

Over the years, the technicians at VETAIR  have heard and seen some pretty unbelievable things when it comes to commercial HVAC and residential HVAC. If you are looking for a professional air conditioning and heating company that who knows how to get things done right the first time, you are in the right place. Here are the answers to some of the many frequently asked questions (FAQs) we get from time to time.

general hvac knowledge, history and technology information

  • When was the first air conditioner invented?

    The first modern air conditioner was invented in 1902 to solve a humidity issue causing a commercial printer’s magazine pages to wrinkle.


    Read more at:

    https://www.energy.gov/articles/history-air-conditioning 

  • Who invented the first mobile air conditioning unit?

    Ohio native and veteran Frederick McKinley Jones invented the first mobile air conditioner. His vehicle-based innovation transformed how perishable goods are delivered across the country, ensuring freshness and quality for all. As a result, he became the first Black member of the American Society of Refrigeration Engineers and was the first Black American to be awarded with the National Medal of Technology.


    Read more at:


    https://www.invent.org/inductees/frederick-mckinley-jones

  • When was the first central heating system developed?

    The ancient Roman hypocaust was an innovative engineering marvel designed to provide central heating throughout buildings.


    This remarkable underfloor heating method utilized hot air generated by furnaces, circulating it beneath the floors and through the walls. The hypocaust is a true testament to the ancient ingenuity.

  • What is the origin of the gas heating furnace?

    Alice H. Parker has an incredible legacy as a true pioneer in HVAC history. Her innovative design for the first gas heating furnace in 1919 revolutionized comfort in homes, paving the way for modern heating systems that keep us warm during winter even today.


    Read more at:


    https://lemelson.mit.edu/resources/alice-h-parker

  • What do the refrigerant code names mean?

    Refrigerants have code names like the HVAC world’s own version of a spy novel. But instead of agent 007, you have refrigerant:


    • 114,
    • 507,
    • 410A, and
    • more.

    The image shown here can help you to understand these codes and decipher what’s in your system.


    HVAC systems are designed to use a very specific refrigerant. Therefore, it's important to have the correct one filled to avoid disaster, especially because some of them can be very flammable.

  • What is the world's largest refrigerated building?

    The world’s largest refrigerated building can hold a whopping 350,000,000 pounds of food, which is enough food to feed a small army – or one very hungry city.


    And just keeping that much food chilled requires a truckload of refrigerant large enough to provide stadium-size HVAC airflow. It would be a disaster if their system failed.


    Reliable AC is just as critical for businesses in Florida. So although your commercial HVAC system may not be as massive as 2800 Polar Way, VETAIR’s techs understand the importance of ensuring zero downtime.

  • What do the colors on refrigerant canisters mean?

    There are over two dozen different refrigerants, which is like having a whole rainbow of cooling magic. Each hue marks a different fomulation, which helps keep your system’s chill straight and ensure that you don’t mix up the mint with the mauve. 

extending the life of your air conditioning and heating system

  • How do I mount a HVAC heat pump outdoors?

    Because each Florida hurricane season is so unpredictable, it is critical to choose the right foundation for your HVAC system's heat pump. Although pavers or bricks might look appealing, they are insufficient for this task. Instead, choose a hurricane pad.


    It is purposefully designed to withstand wind and rain during hurricanes, offering maximum stability resilience in the face harsh weather. This helps minimize movement which would disrupt system performance.

  • Should I buy a high quality air filter?

    Many people wonder if a more expensive air filter will be worth the money. Remember that with air filters, you are investing in both cleaner air and higher HVAC system efficiency - which saves you money in the long run.


    In priority order, here are the things to consider if you want to improve indoor air quality:


    1. Airflow
    2. Filtration level
    3. Price

    You have to find the right balance, based on your health and the health of your family. Higher-rated filters have better dust and allergen capture but at what cost? 


    That’s why we recommend a MERV rating of 8-10 for optimal performance in your home or business. And don't forget to change your air filter every 1-3 months, based on it's published replacement period.



  • How can I stop my condensation line from clogging up?

    Keeping your system running in tip-top shape is essential for indoor air quality, comfort and cost-savings. One easy maintenance pro tip is to sanitize your condensation drain line each month. 


    By pouring a diluted mixture of vinegar or bleach down the line, you can clear out build-up and prevent gunky clogs that lead to system downtime, costly repairs, or even a wet vac intervention. 


    Stay ahead of the game and don’t let a small issue turn into a major problem. A little proactive upkeep goes a long way! 

  • Where do I switch off the HVAC system power?

    Safety is paramount in air conditioning maintenance. If VETAIR or another reputable HVAC company installed your system, there should be a high-voltage cut-off installed directly on or adjacent to the main unit.


    That location provides immediate access for HVAC technicians to swiftly disconnect or reconnect power as needed, significantly reducing the risk of electrocution during repairs. If there is not a cut-off mounted in the direct vicinity of your indoor blower unit, we strongly recommend adding one.


    Removing electrical hazards by prioritizing safety provides peace of mind, enables operational efficiency, and helps protect lives. Not to mention avoiding potential liability.

  • How do I stop my evaporator coil from freezing up then thawing and leaking?

    The key is to keep your HVAC system's evaporator coil clean. That will provide optimal airflow performance and stop the freeze and thaw cycles. But there are more reasons than that to keep it clean:


    Consistent Comfort - Maximizing airflow through the coil prevents hot or cold spots, ensuring every corner of your home or office remains comfortable year-round.


    Improved Energy Efficiency - A clean coil without dust or debris enhances heat exchange, reducing energy consumption and saving you on energy bills. 


    Better Air Quality - Preventing dust, allergens and harmful particles off a dirty coil from circulating in your home or place of business promotes a healthier environment for you and everyone else inside.


    Extended Lifespan -  Regular maintenance reduces system strain, prevents wear and tear, minimizes costly repairs, and prolonging your unit’s longevity. 

  • Should I get my HVAC ducts cleaned?

    To clean or not to clean – that is the question, which we get a lot. If you are thinking about cleaning your ductwork it's important that you start by finding out what type you have. 


    If you have sheet metal ducts, cleaning can certainly improve airflow and reduce allergen spread.


    However, sometimes it is better to replace instead of clean. Especially if you have flex ducts which are easily damaged by brushes, vacuums, or chemicals because they are essentially insulated foil skin over a wire skeleton. Poking a hole in flex duct leads to increased cooling costs and moisture damage.


    The same goes for refraining from cleaning ductboard or fiberglass ducts. Running a brush or other agitation over the sides can release fiber and particles. You want to avoid circulating dangerous particles that are harmful to your lungs. 


    So ultimately, it's important to consider your options carefully and protect your health. And that starts with knowing what kind of ducts you have.

  • How do I know whether the reason for my higher energy bills are airflow-related?

    The main reasons for higher HVAC energy bills stem from inefficiency. Either inefficiency of operation, or of insulation.


    Blocking any portion of your return duct will hamper airflow, causing your HVAC system to work harder. This added strain not only lowers efficiency but also shortens the lifespan of the unit. 


    The incorrect configuration of some return ducts can drastically reduce conditioning efficiency by over 20-25% because of the unnecessary airflow restriction. Please, don’t pay 20% more per month due to faulty ductwork installation. 


    Instead, we recommend adding a ductwork transition that removes any unnecessary obstructions to allow for 100% airflow efficiency. 

  • What can I do to stop constantly having to replace minisplits?

    The indoor unit is one part of a greater whole. But because it's visible, it's easy to forget what the constant onslaught of sunshine, rain, and wind can do over time to the exterior components of your HVAC system. That is, until the system fails. 


    Here are some simple steps you can take to protect the connections between an air handler and heat pump:


    1. Make sure any wall penetrations are completely sealed up to avoid water intrusion and leaks. 
    2. Replace disintegrating pipe insulation. 
    3. Cover, shield or shroud exposed wires and pipes properly. 
    4. Secure any hanging cables so they can’t be pulled on, tripped over, or jarred out. 

  • How do I help extend the life of my air handler?

    Like any machine, HVAC components will eventually wear out because they aren't engineered to last forever. One strategy to minimize wear and tear on your air handler is reducing airflow restriction.


    If your system struggles to keep your space comfortable, help ensure it can breathe easy.


    For instance: if there are no family members or guests around that will gawk at your air handler closet, go ahead and open up those louvered doors at consistent times throughout the week.


    When friends come by to visit, perhaps you relocated a bookshelf or chair up against a wall, blocking the majority of the return vent. Don’t make your system suck all of its air through a straw… move that obstruction to the other wall.


    Proper air circulation is crucial for efficient heating and cooling, and a clear return ensures your system functions optimally. This can help extend the life of compoents like your air handler.

  • Why does water keep backing up my drain line?

    If water keeps pooling up from the drain line and you find yourself having to vacuum out your drain line every month, that could be because your condensation drain line does not have a proper pitch for effective drainage. 


    The optimal angle is a 1% slope. Any flatter than that, and you will run into clogs and water backing up to your system. Excessive pitch will reduce self-scouring action, leading to a build-up of residue in your line.


    Make sure to keep it in the right range of between 1/8” and 1/2” per foot of line distance, in order to achieve optimal performance.

  • How often do I need preventive maintenance for my air conditioning and heating system?

    Once a year is just not enough to help keep your HVAC system running, especially when you rely on it when it gets hot out. Regular inspections help ensure your system maintains overall efficiency, and extends the longevity of your system - saving you money in the long run.


    • HVAC systems in most residences should be serviced semiannually, or twice per year. Once in the first half, once in the second.
    • Places of business with commercial systems and residences with 5 or more units should have quarterly checks. That means we should be seeing you every three months.

    Prioritize your regular service calls to ensure your HVAC system remains in optimal condition, keeping your energy costs down and your indoor air quality high.

  • Should I install a UV-C light in my air handler?

    Installing a UV-C light shines a cleansing light in your air handler to help reduce risks to your family’s health.


    This light sterilizes all of the air flowing through the blower unit so it isn't circulated into your ducts.


    That means air contaminents are effectively neutralized, helping reduce debilitating airborne allergen reactions for people who suffer from chronic breathing challenges.

  • How can airflow rebalancing help me sleep better?

    Having your airflow rebalanced by a qualified HVAC contractor can help you lose less sleep, waste less money, and more evenly heat and cool your home. Here are some additional benefits:


    1. Improved Comfort: Provides multiple zone control of consistent temperatures in every room.
    2. Enhanced Efficiency: Optimizes system performance, reducing energy bills.
    3. Extended System Life: Minimizes wear and tear on your HVAC system, reducing the frequency of repairs and replacements.
    4. Better Air Quality: Reduces dust and allergens circulating in your home creating a healthier environment.
    5. Muted Air Distribution: Reduces distracting and annoying noise because of imbalanced airflow.

  • What is that hissing noise I sometimes hear from my AC?

    If you hear a hissing noise from the HVAC closet, or even by your air handler, that could signal a potential refrigerant leak.


    It is important to resolve the issue as quickly as possible and seal the leak. Even a small hole in your condenser or evaporator coil leads to higher utility bills because your system is working harder to remove heat with less. Not to mention shortening the lifespan of your HVAC compressor, which isn’t cheap to replace.


    VETAIR advises prompt attention to ensure your system’s efficiency and longevity. Don't let leaks drain your wallet.

  • How to extend the life of my HVAC system outdoor components?

    Exposure to the outdoor elements gradually compromises HVAC system functionality, leading to higher energy bills and an eventual system failure. Radiation from the sun and wear from rain eventually can degrade line insulation.


    Therefore, it’s vital to properly secure all insulation around HVAC lines to protect them, delay degradation, and prevent costly system damage. The fewer the breaks between the insulation, the better. If you can make it one continous strip, that is best.


    Help protect your investment, keeping everything intact and secure for years to come by insuring proper insulation between your air handler and heat pump.

  • Why do I need to change my air filter each month?

    You may not need to - it depends on the type of filter. Some filters are designed to be changed each month, but some are quarterly. 


    Regularly changing your HVAC air filter according to its intended lifespan is essential for maintaining optimal indoor air quality and system efficiency. A clean filter:


    • promotes healthier air,
    • reduces energy consumption, and
    • extends the life of your HVAC system. 

    Don’t overlook this essential maintenance task - stay on schedule for a comfortable home environment. If you aren't sure how often you need to change it, contact VETAIR and we will advise. Also, if you need more filters, just call, text or email and we’ll bring them by.

  • What are symptoms of a failing HVAC capacitor?

    In your HVAC system, the capacitor plays a crucial role by storing and releasing electrical energy to start the compressor and fan smoothly. It's kind of like an electrical jumpstarter, that gets everything going.


    Several symptoms of a failing capacitor, include:


    • unusual humming noises,
    • frequent on/off cycling,
    • reduced cooling, and
    • even a burning smell.

    You may also see visible signs like:


    • bulging,
    • leaking, and
    • fried wires.

    If you experience any of these issues, call VETAIR right away for a service call, and we will make a definitive diagnosis. Timely replacement is essential for getting your system back up and running right.

  • Why can't I just install a larger unit?

    One important function of your air conditioner is maintaining the right humidity balance in your home or place of business. That’s because proper humidity levels help prevent mildew growth and also reduce static electricity that could ruin sensitive electronics.


    If your system keeps turning on and off, it doesn't have the time to remove the right amount of moisture from the air. So it may be cooler inside, but also humid.


    And of course, if your system is too small, it stays on 24/7 and will eventually wear out. The proper sizing for your space is a careful science.


    Ensure your space is both safe and pleasant by monitoring humidity levels. The goal is to stay in the 30-60% humidity range. If the air starts to regularly feel sticky, or maybe a little too dry, give us a call. 

  • Why won't my system get our house colder?

    Understanding the science behind air conditioning efficiency can help identify underlying issues. 


    For instance, did you know that even the most efficient air conditioning system, operating at peak performance, will only reduce the intake air temperature by about 20 degrees? This split reflects the reality of the cooling process.


    One test to see if your HVAC system is working properly is to measure the air temperature before and after the coil in the blower unit. 


    For example, if the temperature flowing in from the return measures 75.5 degrees, then the air flowing out should be 55.5 degrees, give or take a few degrees.


    If you aren’t seeing that kind of 20 degree temperature differential, there may be a problem.

  • What are the signs that my compressor is failing?

    Homeowners reach out to VETAIR every week to find out if their HVAC system is functioning optimally, or whether there is an underlying issue.


    These five tips can help you identify whether the issue lies with the compressor or a different key component:


    1. Check for where unusual noises are coming from to pinpoint the source
    2. Inspect the circuit breaker for potential tripped switches or surge damage
    3. Evaluate the flow of air from your vents to rule out obstructions
    4. Monitor temperature fluctuations in different rooms or zones
    5. Assess whether the unit is cycling properly

    If you still can’t find the issue, give us a call so that our technicians can perform a  comprehensive inspection, then test and verify your compressor is working according to design.

  • What are some easy ways to save money on my HVAC?

    It's easy to save money on HVAC: just spend dimes to save dollars. By ridding your home of air gaps, you are extending the life of your system and saving money on utilities.


    1. Start by replacing leaky gaskets or weather stripping around doors and windows. 
    2. Then tape up and insulate holes in ductwork. 

    Taking simple steps like these will significantly enhance the efficiency of your HVAC system, and prolong its lifespan. As a result, you will save money in the short term on energy bills, and in the long term on repairs.


  • Why doesn't VETAIR advertise or promote HVAC services?

    Because actions speak louder than words. Our clients and referral partners have first-hand experience of the quality that VETAIR provides, so there is no need to waste money or add overhead for broadcast advertising.


    Consider the advantages of hiring a locally-owned, veteran-operated business like VETAIR:


    First, we prioritize quality service, community values, and a strong commitment to our clients. Our reputation matters because businesses and homeowners rely on us each day.


    Unlike fly-by-night operators or large corporations, our technicians deliver personalized care that’s tailored to your specific needs. We’re providing client-defined value, not trying to just make a quick buck.


    Experience the difference with an HVAC contractor who truly understands Jacksonville, Mandarin, Fruit Cove, St Augustine, Orange Park, Middleburg, Green Cove Springs, Yulee, Callahan, Hilliard, Fernandina, and everywhere in-between around the First Coast… because this is our home too. Trust us for quality that stands the test of time.

greater Jacksonville, Florida metropolitan HVAC service area