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Posts Tagged ‘phoenix’


How Professionals Perform Air Duct Sealing

Monday, February 9th, 2015

The wind blowing through your hair can be a great feeling when in a car, but not so much when it’s happening because of faulty ductwork in your home.

The average duct system has a lifespan of about 30 years, but that doesn’t mean it remains in pristine shape the entire time. Ductwork can corrode, become damaged or disconnect at the joints, and all this can add up to serious air loss inside your home. So what can you do to reduce or even eliminate the effects of faulty ductwork? Call Johns Refrigeration and schedule an appointment for duct sealing in your Phoenix home.

What Is Duct Sealing?

First, let’s tell you what duct sealing isn’t: putting a piece of duct tape on your ductwork. Even though it may have the word “duct” in its name, duct tape is not effective for repairing faulty ductwork. What is effective is professional duct sealing. The process for professional duct sealing starts with a full inspection of your duct system so that the technician can assess the areas of damage. Once he/she determines what needs sealing, mastic, a fibrous adhesive, will be applied to the holes and cracks.

A piece of fiberglass or foil tape is placed on top of the mastic, and then the technician moves on to the next problem area so that the mastic can harden into a seal. For sectional disconnections, the technician will apply mastic to both ends of the ductwork, put the ends together and wrap them with metal binding, and then secure the metal binding with sheet metal nails; the mastic will harden and form a seal between the sections.

Benefits of Duct Sealing

  • Increased energy efficiency – air loss from faulty ductwork can account for up to 30% of your home’s total air loss. By sealing the faulty areas, you can regain and even increase the energy efficiency of your HVAC system.
  • Better indoor air quality – not only does air escape from faulty ductwork, contaminants, excess moisture, pollutants and excess dirt and dust do, too. Sealing the problem areas can put an end to these problems and greatly improve your indoor air quality.
  • Better comfort – when your ducts are properly sealed, the correct volume of air is delivered to your living spaces.

If you have faulty ductwork in your Phoenix home, call the experts who can seal your ductwork as needed: Johns Refrigeration.

Heat Pump vs. A Furnace: Which Is Better?

Tuesday, February 3rd, 2015

The answer to the question of “is this heating system better than that one?” and all its variants is always dependent on your individual circumstances.

There is no one objectively perfect heating system, and all of them have to be weighed on their ability to meet your individual needs. With that in mind, let’s take a look at a couple of the most popular heating types: heat pumps and furnaces. We’ll outline the pros and cons of each, in an attempt to help you pick the one that benefits you the best.


Furnaces are the most popular kind of heating systems in the country. They are popular for a number of reasons, including relative cost and availability. Furnaces can come in multiple different types, including natural gas and electric. This makes them able to thrive in pretty much any kind of climate. The most common type of furnace is natural gas burning, mostly because of the high heat output compared to the amount burned.

Though the furnace is the most common type of heating system, it still has its drawbacks. For one thing, furnaces are not the most energy efficient heating systems on the market. For another, they produce several varieties of toxic combustion gases during operation. All modern furnaces are equipped to safely dispose of these combustion gases, but there is always the risk of a malfunction.

Heat Pumps

Heat pumps are fairly new to the market of home heating systems, and are unique in their heating method. Instead of burning fuel, they siphon thermal energy from one area and send it to another. Usually, the heat is harvested from the outside air and then sent inside. Heat pumps are extremely energy efficient, owing to this method of utilizing preexisting heat to warm the home. They are also safer than furnaces, as they don’t produce any combustion gases.

The heat pump’s primary drawback is its vulnerability to extremely cold weather. In areas where the temperature frequently drops below zero degrees Fahrenheit, the heat pump can struggle to get enough thermal energy out of the air to provide adequate heat. If you live in a warmer area, however, that isn’t a problem.

If you still aren’t sure which one would fit your needs the best, call Johns Refrigeration. We provide heating installation services throughout Phoenix.

Why Consider a Heat Pump?

Friday, January 16th, 2015

You may or may not have heard of a heat pump, a relatively new kind of heating system that’s gaining popularity across the country. Even if you have heard of it, you may not know how it works or why it’s worth choosing over a more traditional system. For those of you who are curious about the benefits of a heat pump, you’ve come to the right place. Read on to find out how a heat pump actually works, and what kinds of benefits it can provide.

What is a Heat Pump?

A heat pump is a non-combustion based system. That is, it does not burn fuel in order to create heat. Instead, a heat pump moves preexisting heat from a space that doesn’t need it to a space that does. It does this by utilizing two different parts of the system, an indoor unit and an outdoor unit. The outdoor unit is installed outside, while the indoor unit is installed inside, as you may have guessed. The two units are connected to each other by power and refrigerant lines.

When the heat is turned on, the outdoor unit evaporates refrigerant using a coil inside its casing. The gaseous refrigerant acts as a heat sink, pulling thermal energy from the surrounding air and into the coil. The thermal energy is then carried down the refrigerant line and into the indoor unit. There, the refrigerant gas is condensed back into a liquid state. This releases the thermal energy to warm the air before circulation.


There are multiple benefits to installing a heat pump in your home. The first is that a heat pump system is much more energy efficient than combustion systems. It only has to use electricity to operate, and garners the entirety of its heat from the surrounding environment.

The second benefit of a heat pump is that it can actually act as both an air conditioner and heater. It does this by simply reversing the flow of refrigerant through the system, taking heat from the house and releasing it outside. This saves you the space and expense of installing an entirely new system.

If you’d like to know more about heat pumps, call Johns Refrigeration. We provide heating installation throughout the Phoenix area.

Can I Run My AC with Low Refrigerant?

Friday, August 15th, 2014

The refrigerant in your air conditioning system facilitates the transfer of heat from your indoors to the outdoors. Every air conditioner is manufactured to operate with a specific amount of refrigerant. This specific amount is added to your system during installation, and decreases only if a leak occurs in the system. When an AC’s refrigerant level is off – either too high or too low – system-wide problems will develop that can affect many different aspects of your cooling. It may take a while to notice these problems, but one thing to know about refrigerant leaks is they don’t go away on their own. No one wants to think about needing air conditioning repairs during August, but when it comes to low refrigerant, it’s necessary to call professionals, like the ones here at John’s Refrigeration.

Problems Caused by Low Refrigerant

There are multiple problems that can be caused by low refrigerant:

  • Decrease in cool air – as we mentioned above, refrigerant facilitates the transfer of heat in the air conditioning cycle. When this process becomes unbalanced due to a leak, the refrigerant can stay too warm, disabling it from achieving the cooling needed for your home.
  • Ice formation – when the refrigerant level is too low, the warm parts of your system stay too warm, and the cool parts get too cold; this creates condensation that, because of the cold parts, freezes over and forms ice. Scraping the ice off does not repair this problem; it requires professional repair for the refrigerant leak.
  • Compressor problems – your compressor is made to operate with the exact amount of refrigerant needed for your system. When too little refrigerant enters the compressor, it can malfunction in a few ways, including overheating and breakdown. Compressors are complex to repair and even more expensive to replace, so it’s best not to risk this by running your AC with low refrigerant.

Refrigerant Repairs Need Repair

Refrigerant leaks can throw off your entire system, and it’s important to hire professionals to fix them. Why? It can be difficult to find a refrigerant leak, and you need to be certified to handle refrigerant. If you suspect you may have a refrigerant leak and require repairs, call John’s Refrigeration to set up your air conditioning repair service in Phoenix today.

Why Low Refrigerant is a Problem in Your Air Conditioner

Monday, June 9th, 2014

Your air conditioner relies on refrigerant to do its job: cycling through various valves and coils, and cooling your air in the process. Refrigerant varies by type and needs to be applied in a set amount unique to your specific model of air conditioner in order to function the way it should. When those levels drop – such as when a leak springs up in the system – it can severely affect your system’s performance. The good news is that services that handle air conditioning in Phoenix usually have a lot of experience in sealing leaks and recharging refrigerant levels.

Here’s A Brief Outline on Why Low Refrigerant Is a Problem in Your Air Conditioner

In simplest terms, the lowered refrigerant levels mean that inadequate amount of refrigerant enter the evaporator coils to complete the cooling process. As a result, frost and ice will form on the surface of the coils, which creates three specific problems:

  1. The ice represents lost cooling potential, stuck inside the air conditioner instead of being blown into your home. The more ice you see, the more cool temperatures are being lost instead of going where they need to.
  2. The ice forms an insulating layer between the coolant inside the coils and the air that needs to get cooled. The more it goes on, the harder the system has to work to cool the air, and the more energy it will use in the process.
  3. Melting. When the ice melts, it could damage other sensitive components in the system. Most AC units have a condensate pan to catch condensation from the coils, but the presence of excess ice could cause an overflow, which is a significant problem.

If you understand why low refrigerant is a problem in your air conditioner, you also understand that you need a pro to fix it. Simply scraping the ice off won’t work (and may damage the coils in the process). Here at John’s Refrigeration, we handle all kinds of problems related to air conditioning in Phoenix, and we know how to properly treat low refrigerant levels. Pick up the phone and give us a call today. You’ll be glad you did!

Pollen and your HVAC system

Friday, June 28th, 2013

Many people move to the Phoenix metro area from other parts of the United States thinking their allergy problems will go away. But Arizona’s desert dust creeps into every nook and cranny of our homes, though there are many things we can do to prevent this pollution intrusion.

Poor indoor air quality is a major pathway for pollen and many other airborne pollutants. A poorly maintained a/c unit and compromised ducts can be prime real estate for germs. Inefficient filters can be home to many types of bacteria and viruses. Air coming through leaky doors and windows circulates dust, pollen, gasses, and odors through your home. And while some bacteria will cause odors, others won’t, so don’t count on a tell-tale scent to know if your system is housing mold and other pollutants.

Pollen is by far the most difficult allergen to avoid. All types of plants generally favor warm, sunny days for releasing pollen, and they prefer the kind of dry air typical of Arizona. Although these pollen grains are tiny, compared to other allergenic particles, they are big and heavy. This makes them easier to trap in an efficient filtering system.

Between proper air balancing, duct sealing, and using the correct filter, you can prevent pollen and other allergens from getting in your house, significantly reducing allergies and asthma symptoms.

John’s Refrigeration Heating and Cooling offers several solutions to your filtering problems. Our Advanced Oxidation Air Purifierwill reduce 97% of airborne bacterial and 97% of the airborne mold in your home.

Our Electrostatic Air Filtersare more than 84% plus efficient, versus 15% efficiency for the disposable filters commonly used. These reusable filters are also backed by a lifetime warranty.

John’s can improve the air quality in your home because we take a holistic, whole house approach and understand how your home, duct system, and A/C system work together.

24 Hour Emergency Service • Call Us Today • (480) 648-2400 • or • Fill Out Our Online Form
We service most AC brands and models near Mesa AZ.
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Mesa, AZ 85210
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