Justice Incorporated Blog : Posts Tagged ‘Furnaces’

Is High Humidity a Danger for My Furnace?

Monday, November 14th, 2016

Coastal Texas suffers from problems with high humidity, and that’s why we recommend that homeowners here install whole-house dehumidifiers. High humidity affects comfort, but it can also lead to damage to systems within the house. Air conditioners can suffer due to high humidity in the summer. But what about furnaces in the winter? Usually, winter is a period of lower humidity, but in our part of the state, we are likely to be dealing still with high humidity issues through much the season when the furnace is running. Does humidity pose a danger to a furnace? (more…)

Is There Any Reason to Install an Electric Furnace?

Monday, October 17th, 2016

Gas furnaces are the most common type of heating system found in the U.S. There are some good reasons for this: Gas is a less expensive energy source than electricity or propane, making gas furnaces less costly to operate. Gas furnaces have immense heating output, allowing them to overcome almost any level of cold.

However, electric furnaces offer a number of advantages for particular homes. The most obvious one is that an electric furnace can be installed in any home, where a gas furnace requires that a home have a natural gas line. But there are other advantages to think about that can make an electric furnace a better option for a house that has a choice between the two. Here are a few benefits of an electric furnace to consider: (more…)

The Winter Prep Debate: What Type of Heater to Install

Monday, September 26th, 2016

Now that the fall has officially arrived, it’s the season for homeowners to take stock of their heating systems and decide if they need to install a new one before the cold weather hits. It’s wise to make this choice during the fall, since that allows for sufficient time to find the best new heating system and arrange for professional installation.

But what is the right type of new heating system? If you do choose to have a new heater for your house, do you stick with the tried-and-true (most likely a furnace), or do you look into another option that might work better for your budget and comfort? (more…)

Some Tips for Knowing When to Replace Your Furnace

Monday, September 19th, 2016

The fall is often one of the most pleasant times of the year. Coming after the intense heat of summer (and Texas heat is the definition of intense) and cooler winter days, the weather of fall often seems just perfect. And one of the things that’s perfect to do in this weather is replace an old furnace. You’ll have time to consider your various options and then schedule the work with HVAC technicians. Long before the first cold day arrives, you’ll already have a new furnace ready to go.

But… is it really time to replace the furnace? Below are some tips for determining if this is the fall to schedule your new furnace installation: (more…)

The Dangers of Cracked Heat Exchangers in Gas Furnaces

Monday, January 25th, 2016

Natural gas furnaces are found in more homes in the U.S. than any other type of heating system… and for some good reasons: They cost less to run than most electric furnaces. They produce an immense amount of heating power. Natural gas burns cleanly. (more…)

What Does That Noise from My Furnace Mean?

Monday, November 16th, 2015

The short answer to this question is that the noise means your furnace needs to have HVAC technicians take a look at it to check if it has repair problems. Any unusual sound coming from a furnace, whether a gas or electric model, could indicate a malfunction, and you should never hesitate to call on professionals to make sure that any faults are fixed immediately. You don’t want your furnace to risk a full breakdown or even start to run unsafely.


Which Is Better for Winter Comfort: A Heat Pump or a Furnace?

Monday, October 12th, 2015

Fall is the season of the year when many homeowners start making larger plans for the winter weather. If you think that your home needs to have a new heating system put in, then fall is the right time to arrange for the work with skilled professionals.


The Safety Components of Modern Furnaces

Thursday, January 22nd, 2015

Furnaces have always dealt with materials that could be quite dangerous under the right circumstances. Far from resulting in their abandonment as a primary method of home heating, this simply led to the invention of more and better safety components over the years. Modern furnaces now have so many kinds of safety measures that they’re one of the safest combustion heaters around. Let’s examine a few of the safety components that can be found in modern furnaces.

The Limit Switch

The limit switch can occasionally be split into two different parts, but for the sake of brevity we’ll address it as one thing. The furnace limit switch is a small device that measures the internal temperature in the furnace plenum, which is the central chamber of the furnace. When the temperature inside the plenum reaches a certain point, the limit switch turns the air handler on to begin circulating air throughout the house. It doesn’t turn the air handler on right away, because that would blow cold air through the house until the furnace had a chance to warm up.

The limit switch also turns the furnace off if the temperature in the plenum gets too high, so the system won’t overheat. This is why it is listed as a safety component. This second function is also the cause of the behavior “short-cycling,” in which the furnace rapidly turns on and off as it overheats and provokes the limit switch.

Thermocouple/Flame Sensor

For furnaces that use a standing pilot, there are a number of different sensors that determine when to open the gas valve to feed the flame and when to close it. The thermocouple is an older part that created an electrical current when exposed to the pilot light. This current would travel to the gas valve and open it. When the pilot light blew out, the current would cease and the gas valve would close to prevent gas from flowing into the house. Modern flame sensors use different methods, but with the same result.

If you’d like to know more, call Justice Air Conditioning & Heating. We provide furnace services throughout Ingleside, TX.

The Difference Between Standing and Intermittent Pilots

Thursday, December 18th, 2014

“Oh no, the pilot light went out again!” This is a sentence you may have heard someone say time and time again many years ago, as older furnaces required a pilot light to stay on at all times so that heat would be available whenever the heating cycle began. In fact, some homeowners still have standing pilot gas furnaces, even though they are no longer manufactured. Product manufacturers nixed the idea of a standing pilot when it was discovered that electronic ignition could save money and increase safety. Here’s a look at why we recommend replacing older standing pilot furnaces in Rockport, TX with intermittent pilot ignition systems or hot surface ignition furnaces.

The Problem with Standing Pilots

The primary problem with a standing pilot is that it must remain lit at all times. In turn, this means that the gas valve must also remain open at all times. Most furnaces—even some older models—contain safety features that shut off the gas valve when they sense there is no longer a flame. However, there’s still a chance that the sensing device in your unit (either a thermocouple, bimetallic safety device, or remote bulb) will fail or malfunction.

Furthermore, standing pilot furnaces are fairly inefficient, as they must remain running at all times. Most older furnaces have an AFUE (annual fuel utilization efficiency) of about 50-65%. This means that the furnace only uses about 50% of the energy it consumes to heat your home, while the other 50% is completely lost.

Intermittent Pilots

Standing pilots were inefficient, a nuisance to reset, and a potential safety hazard, but intermittent pilots, one of the new forms of ignition for gas furnaces, do not need to remain on. Instead, an electrical current sends out a spark when the need for heating is detected, and it will only stay long as long as is necessary to complete the heating cycle.

Hot surface ignition is an equally popular type of ignition system that uses a material (silicon carbide) which can quickly become energized to the temperature required to heat gas to its ignition temperature.

It’s tough to tell which type of furnace will work best for your needs, but at Justice Air Conditioning & Heating we can help you make the right choices about furnaces in Rockport, TX.