• Technology Makes HVAC Efficient

    Technology Makes HVAC More Efficient

    When it comes to HVAC systems, the efficiency of the main components has improved a lot during recent years, and new technology has also played an important role in increasing the overall efficiency of systems. Better-performing systems have also been manufactured with the use of computer-assisted design tools. Stricter requirements for the user and stricter guidelines for indoor air quality have meant that today’s systems are more environmentally friendly.

    Five major factors are responsible for much of the improved efficiency of HVAC systems, although many other factors have played a part too.

    * The introduction and use of low kW/ton chillers.
    * More widespread use of Boiler control systems that are more efficient.
    * DDC (Direct digital control) systems are being used more widely.
    * More use of energy-efficient motors.
    * More effective use of variable frequency drives.

    For many years, an operating range of 0.8 to 0.9 kW/ton was considered acceptable for chillers; an operating efficiency of over 1.0 kW/ton at a full load was more normal for an older system.

    Today, efficiency has increased by close to 50 percent, with current HVAC systems having chillers with a 0.50 kW/ton rating. Another bonus of the newer chillers is that the operating efficiency doesn’t decrease as quickly as before.

    Chiller Design Changes

    The size of the heat exchangers has also increased, a design change that has contributed significantly to the overall performance of modern chillers. More reliability, increased flexibility, and better precision can also be enjoyed due to the replacing of the older electromechanical controls with electronic controls that use a microprocessor. Due to the compressor’s speed being controlled by a variable frequency drive, part load performance is also better in today’s newer systems.

    An improvement in refrigeration containment is also a benefit of using these new and improved chillers. The amount of refrigerant charge lost each year is typically less than 0.5 percent, a big improvement on older chillers that routinely lost between 10 and 15 percent in a typical year. And the chiller performs much more efficiently over time, thanks to fewer non-condensable gases, because of an improved purge system and lower leakage rates. Today’s boilers to are a lot more efficient than they were, partly due to a microprocessor-based control system replacing the older manual and pneumatic controls. In general, a newer system should save you between 5 to 7 percent in energy costs over an older pneumatic system. Because the operation of the boiler is regulated more precisely with a microprocessor-based system, you’ll enjoy these energy bills savings over an older system. The more precise modulation means that the load placed on the boiler is more precisely maintained, and the fuel to air ratio is better monitored. It means that less soot accumulates on the boiler tubes, and you won’t have to clean the system as much. Your boiler’s thermal efficiency is also greatly improved when the boiler doesn’t collect all that unwanted soot. The ability to operate your HVAC system remotely is another advantage of a more up-to-date microprocessor operating system. You can also monitor steam flow and enjoy the convenience of automated control sequences.

    Direct Digital Controls

    Over 15 years ago, the HVAC industry saw the introduction of DDC or Direct Digital Controls. With these, you can regulate the flow of water and air more precisely, and the system has become standard across the industry, a big improvement on the pneumatic and electric systems. A pneumatic system has problems with overshoot, hunting, and offset, and the implementation of DDC systems has eliminated these issues, allowing homeowners and businesses to save money. Control activities are also better coordinated because they can respond to an almost unlimited number of sensors. Over time, a DDC system won’t lose much of its accuracy or precision, and a range of more complex control instructions can be carried out than with an older pneumatic system. Another benefit of DDC systems is that they eliminate the need for potentially expensive changes to hardware when changing occupant requirements mean modifications to the system. And as mentioned before, the ability to operate the system remotely is a big plus.

    Energy Efficient Motors

    Although the level of operating efficiency is modest when your system uses an energy-efficient motor, it nonetheless makes a big difference. A standard 10 HP motor operates about 88 percent efficiency, although you can expect that rating to increase to about 93 percent with the same size energy-efficient motor. A 50 HP standard motor has an energy-efficient rating of about 90 percent, while the same energy-efficient motor has around 94 percent. However, it does mean a first cost increase for the motor and a boost in operating efficiency. The number of hours that the motor operates in a year and the loading will determine how quickly the extra first cost is recouped. The first cost differential will be recovered more quickly if a motor is used more hours in a year and operated at or close to its full load rating. You can assume it will take between 3 and 6 months to recoup the losses if the motor is constantly running near full load or close to it. Energy-efficient motors are especially well suited for use in HVAC systems because of the long hours of use and the continual loading involved. If you have a recently installed system fan or circulation pump, you may find that an energy-efficient motor drives it. If your system is operating all day, every day, or you run it a lot, you should enjoy a noticeably lower energy bill, thanks to the drive motor’s 4 to 5 percent increase inefficiency. An increase in power is another benefit of using an energy-efficient motor. It means fewer system distribution losses, extra capacity for distribution, and less drawing on the electrical system. Users of large amounts of electricity can benefit from this increased power, especially when there are limitations on system capacity. However, the increased power factor of a higher efficiency motor generally doesn’t justify the extra cost. In general, it will take you between 5 to 10 years to recoup the extra cost of replacing an older motor with a higher-efficiency motor. It makes it hard to justify using them in existing applications. Since being used in HVAC systems, variable frequency drives have been beneficial in lowering system energy requirements when operating in a part load mode. These drives have been responsible for providing the most significant results for new technology for boosting operating efficiency and have been used in various settings, from chillers to fans. And it usually just takes between one and two years to recoup the extra cost, when most systems are operating about 90 percent of the time with a part load capacity.

    The savings are more with a larger motor, is the general rule of thumb. It generally makes financial sense to install a variable frequency drive in any system with a motor of at least 20 HP.

  • HVAC Tips & Tricks

    Air Conditioning and Heating Tips & Tricks

    Many people don’t know much about heating and air conditioning, but your home or office must be comfortable. It can also help you save money on electricity bills if you take the time to set up an energy-efficient system. This blog post will give you some great tips that will help keep your AC and heating running smoothly all year long!

    Change Your Air Filter

    The first thing you should do is check your air filters and see if they need to be replaced. Most people don’t realize how much of a difference this makes when it comes to the efficiency of their heating and cooling system, but an old or dirty filter can lead to poor airflow, which in turn will make your HVAC unit work harder than necessary; wasting energy! It’s also important that you get replacement filters made specifically for your AC/heating system. Air filters can be made from different materials like fiberglass or charcoal, and you don’t want to get the wrong kind.

    Check Your Vents

    Venting is another important part of your heating and cooling system; it helps circulate air throughout your house. If furniture or other objects block vents, airflow will be restricted, which isn’t good for the system. You may also find that you have vents located in inappropriate places, like close to walls or ceilings where it gets too hot or cold and doesn’t circulate correctly.

    Make Sure Your Ducts Are Free of Leaks & Obstructions

    Check your ductwork to make sure there aren’t any leaks because this will lead to a loss of energy efficiency and poor air quality inside your home. It’s also important to look at your insulation levels. If they’re not high enough, it can cause heating issues during the winter months. Also, avoid putting anything near vents such as furniture, clothing racks, plants, etc.. because these objects block airflow, reducing efficiency and wasting energy!

    Check Your System Regularly

    The best way to avoid HVAC issues in general (not just during spring) is by checking on your system regularly. This includes ensuring that there aren’t any leaks around vents and ducts, replacing filters when necessary, etc. Doing these things might seem like a hassle but trust us, they’re worth it because if something goes wrong with your heating & cooling system while you wait until springtime, an emergency services call could be very expensive!

    Clean Or Replace Dirty Cells

    Cleaning or replacing your indoor/outdoor coils is all you can do to ensure that your system is working efficiently. Cleaning the unit’s interior will help with airflow, while new cells will allow for better cooling and heating overall. It’s a good idea to have this type of work done by professionals who know what they’re doing because you wouldn’t want your coils getting damaged during the process.

    Check Filters On Furnace & Air Conditioner Units

    Replacing furnace filters regularly is just as important as air conditioner filters; they both need to be checked at least once per month during the springtime (or more often if needed). It’s also possible to find electronic filter monitors that let you know when to change them, so you don’t have to remember yourself! If there aren’t any indicators, check every 30-45 days, depending on how frequently you use your AC and heating units.

    Get An Annual Maintenance Check-Up

    You should schedule an annual maintenance check-up once springtime rolls around. This is necessary to make sure that your heating and cooling systems are in good working order, plus it’s a great way to avoid any costly repairs or emergencies during the summer! Our professionals will check your system, clean it out if necessary (including the coils), and make sure that everything is in good working order. And see if they need to be replaced. Most people don’t realize how much of a difference this makes when it comes to the efficiency of their heating and cooling system, but an old or dirty filter can lead to poor airflow, which in turn will make your HVAC unit work harder than necessary; wasting energy! It’s also important that you get replacement filters made specifically for your AC/heating system. Air filters can be made from different materials like fiberglass or charcoal, and you don’t want to get the wrong kind. Getting local Plano air conditioning services for your vents is another important part to keep your air conditioning up to speck.

    Get Your AC Repaired ASAP If It Breaks Down During Summer Months

    If you find yourself without air conditioning, then don’t put off getting it repaired because this could lead to serious problems down the road if not dealt with quickly. An air conditioner repair is expensive enough as it is, but leaving things to go too long can end up costing even more money than necessary since lack of proper A/C for an extended period won’t only affect you but also your home’s interior.

    Keep windows and Doors Closed. 

    If you’re going to be away from home for a few days, then make sure that your windows and doors are closed. This will help keep the air in instead of letting it escape, which means wasting energy on heating or cooling an empty house. Having your windows open might seem like a good idea because it allows fresh air into your home, but you should try to limit this type of thing when possible. Air that comes from outside can be much hotter or colder than indoor air, affecting the temperature inside.

    The best way to avoid HVAC issues in general (not just during spring) is by checking on your system regularly. This includes ensuring that there aren’t any leaks around vents and ducts, replacing filters when necessary, etc. Doing these things might seem like a hassle but trust us, they’re worth it because if something goes wrong with your heating & cooling system while you wait until springtime, an emergency services call could be very expensive!

    Check Your Hot Water Heater

    It’s easy to forget about checking things like water heaters over the summer months, but this is yet another important thing you should do at least once per month during springtime. The last thing you want is for something bad to happen while nobody is around, so remember that prevention does work when avoiding costly repairs down the road. Get Your HVAC System Ready For Spring When wintertime rolls around, most people tend to turn off their HVAC system until the warmer months, but this isn’t necessary. Instead, you should make sure that your system is in good working order before putting it away, which means checking things like filters and ducts for any damage or problems to avoid major issues next time around.

    These are just a few of the many air conditioning & heating tips & tricks available which will help keep your house comfortable all year long! Whether you’re having trouble getting something repaired quickly or you want to save money on energy costs, then these simple steps could end up making a big difference when summer rolls around again!

     

  • Blogging

    Your Blogging Needs

    The importance of a HVAC system in your home is that it uses cooling and heating to regulate temperature and humidity levels within a specific range. It should be noted that this system affects not only the homeowners, but also the surrounding community.

    As homes become more energy efficient, this can lead to the HVAC unit having to work harder than anticipated in order to maintain the desired temperature levels within the home. The HVAC system is not idle, even when we are at work or away on vacation. The effects of there being too much load on an HVAC unit can lead to expensive repairs or premature replacements. To make sure a home’s HVAC operates at its optimal efficiency, it is important for owners to follow HVAC maintenance tips and schedule regular tune-ups.

    Even in homes with an efficient heating or cooling system, there are still a few steps that homeowners can take to ensure their unit is running at its top performance level. First of all, it’s important for owners to keep the filter clean on both the air intake side as well as the return side of any newly installed equipment. Second, they should make sure the airflow into and out from appliances like furnaces and heat pumps is not blocked by furniture or other objects. It would be wise for homeowners to also install programmable thermostats so they don’t have to constantly think about adjusting temperature levels themselves!