Air On Demand Blog: Archive for May, 2014

Advantages of Rooftop Air Conditioning Units

Friday, May 30th, 2014

*Air On Demand no longer offers commercial HVAC services – view a full list of our air conditioning services here.
When it comes to keeping your business comfortable during a long Florida summer (and on into the warm fall and even times during winter), you need to have the most durable air conditioners working for you. If you have yet to install a rooftop package unit, we suggest that you look into this possibility for your next installment. Rooftop package units have numerous advantages.

Whatever HVAC system you choose to install for your business, you should turn to Air on Demand to handle the installation work as well as the regular maintenance and any repairs the system may need during its long services life. Call us today and talk to one of our NATE-certified technicians about how we can install a rooftop unit in Kendall, FL for your company.

Rooftop unit benefits

  • No need for a split unit: The standard central air conditioning system is a split system with an indoor unit and outdoor unit, which takes up extra space inside your business that you could more efficiently use for other purposes. With a rooftop package unit, all the components are stored in a single cabinet: the compressor, the evaporator coil, the condenser coil, and the blower fans. This not only frees up space inside your building, it also reduces problems from noise pollution, so you have a quieter workspace.
  • (Almost) no space limitations: The roof is the limit when it comes to the size of your commercial AC. You can have multiple rooftop package units together to supply as much air conditioning power to your business as necessary, without using up one extra inch of valuable workspace. No matter how big or how many rooftop units you need, they won’t become eyesores for the company either, since they remain well out of sight of all but helicopters.
  • Heat pump option: You can choose to have your rooftop AC installed as a heat pump, and that means you’ll have heating for the short winters taken care of at the same time—and no extra space needs to be sacrificed.
  • Humidity controls: Maintaining balances humidity is an important part of everyday life in Florida homes and businesses. Packaged rooftop units from Trane come with humidistat technology that can control the moisture level inside your business and regulate the introduction of fresh air, creating a work environment comfortable for everyone.

Turn to commercial professionals

To care for a rooftop unit or install an AC unit  in Kendall, FL requires the work of commercial HVAC specialists. Don’t trust this job to just anybody with a license: look to certified commercial experts, like those at Air on Demand. We have a long partnership with Trane to provide you with a variety of the finest products for commercial heating and cooling. Contact us today to prepare for the most comfortable summer your business has yet experienced.

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3 Problems with Your Air Conditioning Fan That Require Repairs

Friday, May 23rd, 2014

The standard central air conditioning system in a home has two large fans. A blower in the inside cabinet draws warm air through the return vents and sends it across the evaporator coil, where it loses heat, and then moves it out into the ventilation system. The fan housed in the outdoor cabinet draws outside air across the condensing coil, where it releases heat.

As key mechanical components inside an air conditioner, the fans need to remain in top operating shape or else the performance of the system will be in jeopardy. If you notice a drop in airflow from your vents, feel insufficient levels of cooling, or hear loud striking sounds from the AC, don’t hesitate to call professional technicians to handle repairs. You’ll find the NATE-certified staff at Air on Demand ready to help you with your air conditioning in Doral, FL, no matter the trouble.

3 Repair Issues With AC Fans

  1. Broken fan belt: This is a problem for older air conditioners that still use blower fan belts. (More recent models use direct motors.) The fan belt is more susceptible to damage than other parts of the fan, and the intrusion of debris into the cabinet can sometimes cause the belt to break. The belt can also wear down from age, causing it to fray and tear apart. A loose belt will make a loud clanging noise in the cabinet, and a fraying belt will create a clicking sound, so call for repairs as soon as you hear anything unusual.
  2. Burnt out motor: The motor that runs the fan (either a direct motor or using a fan belt) can suffer from strain that will cause it to burn out and fuse the wiring inside the case. When this occurs, the fan will not move at all and the motor will need to be replaced. A motor undergoing excess stress will start to make screeching and grinding noises, and sometimes repair technicians alerted in time can repair them instead of replacing them.
  3. Bent fan blades: This trouble is more common for the outdoor blower because large debris such as stones and branches. Bent blades will begin to strike the fan casing and will rapidly inflict further damage to the air conditioner if not repaired. When you hear the sound of metal striking metal coming from the cabinet, call for repairs right away.

If fan problems are not fixed soon, not only will it risk further repair needs, the loss of airflow will impair heat exchange and threaten your supply of cool air. Opening the cabinet to fiddle with the fan on your own is not the way to handle the trouble, since you can potentially cause more issues with the unit. Instead, call Air on Demand and speak to our experienced staff. We will send out AC repair technicians who will take care of your air conditioner in Doral, FL so you will have the best airflow and performance from your AC for the rest of the summer. Give us a call today.

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How Leaky Refrigerant Affects Your Air Conditioning System

Friday, May 16th, 2014

Refrigerant is the chemical in your air conditioning system that helps with heat transfer and the cooling process. If your air conditioning system develops a leak through which refrigerant can escape, your system can begin to breakdown. The experts at Air on Demand have compiled some examples of how leaky refrigerant can affect your air conditioner. If you suspect a refrigerant leak in your system, schedule air conditioning repair in Miami, FL immediately.

Decrease in Cooling Output/Warm Air

Refrigerant is the chemical which facilitates heat transfer in your air conditioning system, so one telltale sign of a possible refrigerant leak is experiencing a decrease or total loss of cool air coming into your home.

Increase in Utility Bill

Some leaks may not affect your cooling right away, but that doesn’t mean it’s not affecting your system. Low refrigerant levels make it impossible for your air conditioner to operate as efficiently as it ought to. To make up for the leak, your system may need to work harder to achieve the same level coolness in your home. When your AC works harder, it draws more electricity, which can result in larger utility bills.


The refrigerant in your air conditioner helps to remove heat from your property, leaving cool air behind for redistribution throughout your home. Leaks can hinder this process, so that the heat transfer/cooling process doesn’t happen as it should. When one part of the system is too hot and the other part is too cold, excess condensation can develop that freezes up in the colder part, causing icing.

Fixing a Refrigerant Leak

Fixing a refrigerant leak is not a DIY job; it requires the expertise of a trained professional. Why? First, refrigerant is a chemical monitored closely by the EPA and requires specific handling; second, refrigerant leaks can be difficult to find, and may need the use of specific methods to be discovered. Additionally, if you do have a refrigerant leak, your system will most likely need a recharge, which can only be handled by a trained professional.

Do not ignore a refrigerant leak. Leaks do not repair themselves, and they tend to get bigger as time goes on. The best way to tackle a suspected refrigerant leak is to call Air on Demand right away.

Since 1989, Air on Demand has been doing air conditioning repair in Miami, FL, and in that time we’ve seen a lot of refrigerant leaks. Think you may have a leak in your air conditioner? Call today and schedule an appointment.

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Why is Low Air Flow a Problem with Air Conditioning in Miami?

Friday, May 9th, 2014

Healthy air flow throughout your air conditioning system is critical to its operation. A decrease in the amount of air flowing through the system can cause a number of problems, some potentially larger than others. And of course, it directly affects your comfort level.

First, let’s take a look at the ways airflow can become restricted.

Potential Causes of Air Flow Decrease

There are a few ways your airflow can become obstructed:

  • Bent fins on the outside unit (part of the condenser)
  • Broken fans
  • Blockages in the ductwork
  • Dirty air filter

How Decreased Air Flow Affects Your AC

The best way to demonstrate how decreased air flow to your system can cause problems is to look at how it can affect specific components:

Warmer Air

Air flow can become obstructed in the condenser unit when the fins are bent or the fan is malfunctioning and/or broken. Once the air flow process is interrupted, the condenser can no longer release heat as needed, resulting in the refrigerant not cooling as needed.


Low air flow in the evaporator means that it can become too cool, which may lead to icing on the evaporator coils.

Overworked Compressor

If the refrigerant from the evaporator is too cool, the compressor has to work extra hard to pressurize the refrigerant into a gas. This overworking can lead to overheating and potential breakdown of the compressor itself.

Reduced Airflow in Ductwork

If the duct/ducts in your property are blocked, the air flow going into and out of your system is decreased. This means less delivery of cool air to your indoors and less removal of heat and humidity outdoors.

Overall Stress on the System

Air flow obstruction affects the entire air conditioning system, which can put excessive strain on the system itself. Excessive strain can lead to premature wear-and-tear, potentially setting up your components to malfunction or even breakdown.

Air Not Flowing Properly? Call Air on Demand

Air conditioning in Miami during the summer months is an essential, so if you are experiencing low air flow in your system, it’s best to have a professional inspect your air conditioner as soon as possible. Call Air on Demand today and schedule your air conditioner for an inspection.

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Considerations for Spring Air Conditioning Installation in Miami

Friday, May 2nd, 2014

We’ve all seen it: the DIY plumbing job that sprayed water all over the house or the Weekend Warrior electrical box re-wiring that resulted in a big spark and a lot of smoke but no electricity.

While these two descriptions are a bit stereotypical of the standard do-it-yourself-projects-gone-wrong, the truth is there are some property projects that should not be undertaken by the average handy homeowner. One of these projects is installing a central air conditioning system in your Miami property.

First Up: Calculations

The first step in an AC installation is to find out exactly how much air conditioning is necessary to keep your home cool. Many people think the main – and only – way to determine this is from square footage. What really needs to be calculated is “heat gain” – how much heat your house takes on during a given day – and square footage will not give you this information. Instead, you need to calculate what is known as the J Load:

  • How much insulation your home has
  • Types and placement of windows in your property
  • How the sun hits your property every day (orientation)

Second: Picking a Properly-Sized Unit

Size equals power in air conditioning terms, and if your unit isn’t powerful enough to cool your home, you’ve installed a system that won’t do its job. Likewise, if the unit is too powerful, air won’t circulate appropriately as the rooms will cool too quickly and the unit will shut off. In either case, the comfort level in your space is compromised.

Using the J Load calculation will help you figure out the size of the unit you’ll need. The size will be expressed in either tons or BTUs, where one ton equals 12,000 BTUs per hour.

Third: Picking an Efficient Unit

The efficiency of a unit is also important, as it correlates directly to the amount of energy it uses and the money you’ll spend when running it. Using the SEER number (seasonal energy efficient rating), you’ll see right on the unit’s packaging what its rating is; the higher the SEER, the more efficient it is. Current federal law requires that all new air conditioning units have a SEER of at least 13.

Fourth: Proper Placement

While newer units have gotten substantially quieter, no outdoor air conditioning unit is going to be really quiet. As such, you want to make sure the unit doesn’t get placed near or underneath bedrooms or living spaces where the noise will cause intrusion. Also, the outdoor compressor needs to be placed clear of any enclosures, as the top part is blowing out exhaust air. If the unit has any airflow restriction, its efficiency is compromised.

Fifth: Ductwork

The ductwork delivers the cool air, so it’s essential to have it inspected. Most times, the ductwork will need some kind of adjusting. Typical adjustments are:

  • Upsizing the furnace blower
  • Sealing the ducts
  • Updating supply registers

No ductwork? You’ll need to put ducts in, and this requires the work of a licensed contractor.

Ready to Call an Expert?

It takes a great deal of skilled work to install an air conditioning system. Installation of an air conditioning system requires the use of other systems in your property, including the heating and electric, so the margin for error is quite wide. Call Air on Demand in Miami today and have a true air conditioning expert install your new air conditioning system.

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