Category Archives: Tips

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high efficiency furnace

High Efficiency Furnace: Is it the best option?


Today, “high efficiency” is a common term used to describe appliances and products, such as a high efficiency furnace, that are much more efficient than those of the past and help keep more money in your wallet. And this is absolutely true…in most cases. But, sometimes the high efficiency option might not be what’s best for you and your specific situation. How so?

I’m glad you asked because I’m going to explain it in this post!

What exactly is a High Efficiency Furnace?

In today’s standards, a high efficiency furnace is a furnace that has an AFUE rating of 90% or more. You are probably wondering what the AFUE rating actually means. Let me explain: AFUE stands for Annual Fuel Utilization Efficiency. The AFUE rating simply refers to the amount of produced heat that is actually used to heat the targeted area(s). For example, let’s say you wanted a high efficiency gas furnace with an AFUE rating of 90%. This would mean that 90% of the heat that is produced during the heating process is used to heat your home or business. The other 10% is lost during the process.

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hvac split unit

What exactly is a Split Unit in HVAC?


If you’ve ever been looking for a new heating and air conditioning unit then you’ve probably come across the term “split unit”. There are various types of split units in the HVAC world and in this post I’m going to explain the basic understanding of what a split unit is.

The Basic Concept

A split unit is usually compared or contrasted with a packaged unit. There’s very good reason for this. A typical packaged unit will consist of the air conditioner and its components along with the heating system and it’s components all located in one unit outside. So the ac and the furnace, for example, along with its components, would all be in one accessible unit outside. If you’ve ever noticed a large rectangular unit on the rooftops of a business or outside of a home, then you’ve probably seen a packaged unit. These larger unit’s appear much bigger as far as what you can see because everything is located inside of that one unit. 

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cracked heat exchanger

Cracked Heat Exchanger: Symptoms and Causes


A cracked heat exchanger in a furnace can be a potentially dangerous situation. The main reason for this is due to the fact that furnaces are located inside the living area of the particular home or business. For this reason, I want to share with you some of the common symptoms and causes of a cracked heat exchanger in a furnace.

Symptoms of a Cracked Heat Exchanger

If there is a crack in the furnace’s heat exchanger, there will be some signs and symptoms that are normally evident concerning the furnace.

Evidence of Soot: If there is evidence of soot buildup inside of the furnace, then it’s very possible that there could be a crack in the heat exchanger. This is due to the combustion process being incomplete. Other problems could cause this symptom as well such as balance issues with the burners.

Carbon Monoxide Levels are HighIf there is a carbon monoxide detector/alarm in your home or business (preferably near the furnace), then it will notify you if carbon monoxide is invading your living space. Normally there will also be a strong strange odor as well. If this is the case, then it’s possible that the heat exchanger is the culprit.

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buy new furnace

What are BTU’s for your AC and Furnace?


In this post the focus of BTU’s is going to be on heating and air units such as air conditioners and furnaces, but much of what is going to be shared is universal to other appliances as well. So what are BTU’s?

What are BTU’s?

Very simply, a BTU is an acronym for “British Thermal Unit”. A British Thermal Unit is the standard of measurement used for generating or increasing thermal energy. A single BTU is the amount of energy it takes to raise the temperature of an environment of 1 pound of water by 1 degree Fahrenheit (per hour, normally). This standard of measurement is used for heating and air units, grills, stoves, and other common appliances.

What are BTU’s for a furnace?

When it comes to your furnace or any other heating system for your home or business, BTU’s are going to be what are used to determine the unit’s heating capacity.

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what size furnace

What Size Furnace Do I Need?


When it comes to replacing your furnace or installing a new furnace at a newly constructed location, it’s important to know what size furnace that you need for your particular situation. You don’t want to install a furnace that is too big or too small for the area that is being heated. This can cause issues with the furnace itself, which can lead to premature furnace repairs. The utility bill can also be affected if the furnace isn’t the correct size. So having a properly sized furnace is essential for efficient operation and the lowest utility bills.

But, how do you determine what size furnace that you need?

The Size of a Furnace is Categorized by BTU’s

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fall preventative maintenance

Fall Preventative Maintenance for Your HVAC Unit


West Tennessee is starting to experience cooler mornings. With Fall peaking from around the corner, it will soon be time to turn the thermostat from cool to heat. There are things that you as the homeowner can do around your home to make sure things run smooth, but you also need an experienced HVAC technician to regularly maintain your unit through the seasons as well. Cagle Service offers a Preventative Maintenance Program to keep your unit running at it’s best through all seasons.

As the homeowner, there are some things you can do around your home to help the life of your HVAC unit:

1) Filters: Homeowners are recommended to change the air filters in their home once a month, especially in high pollen areas. Not only does that help air flow but also keeps allergens and dust from getting into the air system. (Read more on the importance of changing your air filters)

Related: How Often to Replace Your AC Filter

2) Routine Cleaning/Dusting: With the cooler temps coming in, some people are tempted to raise the windows to let fresh air in and give the HVAC unit a break. Dust, mold, allergens, etc. can get inside and settle within the home. Without cleaning and dusting, all of the allergens, dust, and other particles will circulate inside, lowering the quality of air.

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heating, ventilation and air conditioning

Understanding HVAC Terms

Category:General,Tips Tags : 

Your HVAC unit has quit working! As you call to find someone to check it out, all of these HVAC terms are being said and it can be quite confusing. We’re going to define a few for you to help you concerning your future Heating, Ventilation and Air Conditioning questions:

What Does HVAC Mean?

Short answer: Heating, Ventilation and Air Conditioning

HVAC Unit:
This is the machine that heats and cools your home or work space.
Heating, ventilation and air conditioning

A mechanical device in the HVAC unit that compresses gas used by the air conditioner to compress freon.

Evaporator Coils:
The part of the HVAC unit where liquid refrigerant that the compressor moves into it turns to gas. As the air that blows from the blower fan moves over the coils the cold refrigerant removes the heat from the space’s air.

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air conditioning problems

Top 10 Causes of Air Conditioning Problems


The average lifespan of an air conditioning unit system is 10-15 years. Once a unit hits 10 years of age and begins to have air conditioning problems, it is time to see if AC repair costs will outweigh replacing the unit. New units will improve the indoor air quality and also help the resale value of the home.

Noticing white dust in the home? That happens to the duct work as it gets older. The combustion exhaust in a furnace is acidic. If this makes contact with galvanized steel, the acid will react with the zinc in the galvanizing, and this can produce a white powdery residue, as is commonly seen on the terminals of a car battery. If this substance is getting into the circulating air system, there could be a crack or hole in the heat exchanger, and that would be hazardous.

Excess noise shows the possibility of the duct work not being large enough for the square footage or a problem with the unit’s indoor coil.

Are you experiencing a rise in the energy bill but no change in how the unit is being used? That is always a big indicator the system is not running as efficient as it once was. In this post we are going to share with you some common air conditioning problems that hinder air flow.

Top 10 Air Conditioning Problems That Hinder Air Flow

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heating and air units

Disadvantages to buying an undersized HVAC unit


Heating and Air units can get expensive. Some people, thinking they are saving some money, buy a smaller unit than needed. Companies like ours understand the driving force behind this idea but we also know its going to cost you more in the long run.

Your Energy Bill will Rise

Although buying a smaller unit will initially save you money on cost of the unit, monthly the electricity use will increase, eventually using the money saved…plus more. An undersized unit will lack what it takes to reach a set temperature in an appropriate cycle time. Basically, the unit will be running at all times trying to cool the desired area to the desired temperature. The town of Wellesley, Mass., has estimated the average cost of running central air conditioning in a typical home for six hours a day will use 900 kilowatt/hours (kWh) per month. At a cost of $0.134 per kWh, this amounts to $120.60 per month. If that was being run on an undersized unit, the cost could be up to 4 times that! The constant running of the unit also arises our next concern for undersized units.

Repair Needs will Increase

Running the unit non stop will add a lot of wear and tear on the unit quickly. Undersized heating and air units do not produce enough velocity to push all the cool air out of the duct work. The air comes out, but not at the speed it needs to properly cool the area. When adding up the cost of repairs and regular maintenance, the undersized unit is costing you more than what you would have initially paid for the right sized unit.

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prevent frozen pipes

How to prevent frozen pipes

Category:Tips Tags : 

Frozen pipes can create leaks as the frozen water expands and cracks the copper tubing. When this happens, not only will you have little to no water supply, but when the pipes do thaw out, you can have some serious leaks to repair—or worse. But no worries. In this post we’re going to share some tips with you to prevent frozen pipes!


Keep all water-supply piping away from outside walls, where it could be exposed to cold winter weather.
If it is imperative to have pipes located on an outside wall, as they must be well-insulated. Piping insulation is sold in both rubber and fiberglass.
Insulate pipes in all other unheated areas as well, such as crawl spaces, basement, attic, and garage. Fix the source of any drafts (such as near cables, dryer vents, bathroom fan vents, windows) and insulate pipes at risk.
Before winter, close the water shut-off valve inside your home that provides water to outside spigots, and then drain each line by opening its spigot until it no longer drips. The, close the spigot.


Keep garage doors and outside doors closed, and plug up drafts.
Open all faucets, both hot and cold water, to just a trickle, to keep water moving in the pipes to help to prevent icing.
Set the thermostat to at least 55ºF both day and night—no lower. Higher is even better, especially if your home is not well-insulated.
Keep doors to all rooms open to allow heat to flow to all areas, which helps to warm the pipes in the walls.

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Cagle Service Heating and Air Conditioning Jackson TN

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Cagle Service, Heating & Air Conditioning, Jackson, TN
hvac service

heating and air