Run HVAC fan throughout the day for comfort


At my old house, we replaced the HVAC with a high efficiency unit that came with a thermostat that would blow, say, 50% to 70% of the time for air movement to increase comfort level. I'm not sure but I think I recall that it was a variable speed fan that did that for a milder air flow.

My son just bought his first house and installed a programmable thermostat that allows him to do the same thing so I suggested he let the main blower run 50% of the time to see if it increases comfort of the house.

My question is whether there are any issues with letting the main blower do that as far as wear and tear on it. He seems to think the house feels more comfortable and that the AC hasn't needed to kick on. My only other issue with the idea is the main blower is noisier than the one in my high efficiency unit.

Is there any cause for concern with...

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By: Brian Schutt | October 3, 2016

“Should I set my HVAC fan to auto or on” is a question we commonly receive from Homesense customers. It’s a debated topic throughout the industry, so we’re going to give you the pros, the cons, and our recommendation.

Setting Your HVAC Fan to “ON”

When you set your fan to “ON,” you’re telling it to keep running 24 hours a day, 7 days a week, regardless of the heating or cooling setting. There are a few positives to this feature.

Pros to Keeping Fan Continuously Running:

Keeping the fan on creates a more even distribution of heating and cooling, circulating the air if you have cold or hot spots in your house, like a bedroom above a garage. Less frequent starts and stops of the fan can reduce the stress from startup, and potentially help extend it’s lifespan. Leaving the fan on 24/7 ensures cleaner air, as the air is pulled through the filtration or UV light system. This can be better for people with allergies....
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I just had a new furnace and central a/c installed. The installer says I should run the fan 24/7, even when there is no heating or cooling going on. Is this advisable? Will it shorten the life of the fan? It probably is okay during heating. During cooling though it shouldn't be run 24/7 without the compressor running because it will evaporate the moisture that's condensed on the evaporator coil which you just paid to have removed for comfort from your home, the kicker is you're using more electricity to do this too. The end result will be a muggy feeling in the home during cooling season. ...or it will distribute cool air evenly and make your whole house comfortable, not just by the thermostat.

The answer is: It depends (this applies to heating too, and is usually the answer to most short questions - not just fan questions). Do have alergies and need continuous air purification? Are there uncomfortable temperature imbalances? If the house is...

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If you’re on the search for a new HVAC unit (central AC, heat pump and furnace), you know the question of which technology offers the best consumer experience quickly arises. In a market full of options, it might be hard to decipher which best suits your needs, but most experts would agree that variable speed technology is one of the top choices in HVAC equipment and performs in ways that one and two-stage units simply cannot. With the ability to vary its operating speed considerably, a variable speed fan can not only maintain a comfortable temperature indoors better than other units, but it also has the ability to save money and energy—two big advantages when choosing the system that’s right for you.

What Is a Variable Speed Fan Motor?

Just like its name suggests, a variable speed fan motor is a fan that has the ability to vary its operating speed. Unlike a two-stage system that performs at both full-capacity and partial capacity, or a one-stage system that only...

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A properly sized AC unit keeps your home comfortable during those long, hot summer days. The key to efficient AC performance: Regular maintenance. A spring tune-up will do wonders for your AC unit this summer.

Yet, even with regular service, AC units can still have performance issues. One of the most common summertime AC problems: The AC unit runs constantly. Not only does an over-running AC create cooling issues in the home, it can also increase your electricity costs and put undue stress on the AC unit.

An efficient, well-functioning AC unit will run frequently during the summer months. But you can tell it’s over-running when you notice:

Unexpected increases in your electricity bill Uneven cooling throughout the home The AC unit runs for long periods of time, with little effect on the home’s temperature

All of these symptoms may be a sign that your AC unit isn’t running at optimal performance. In these cases, you should call an HVAC specialist to help...

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Keeping HVAC Running Efficiently

Let’s discuss HVAC efficiency in this month’s Comfort Talk with KCC. It seems that we are running our HVAC systems more often than not. From cold days to hot days, our systems are a rather large asset in our homes and one thing that we depend on most to keep our families comfortable. Running an efficient system can keep you at your most comfortable, and even save you money. So, what can you do to keep your HVAC running efficiently?

Here are some general rules for running an efficient HVAC:

1.) Change your filters often: Dust and debris collect in our filters quickly. Therefore, it is important to change the filters in our systems as often as every three months. When dust and debris start to collect and consume the filter, it causes your system to work harder. Having pets can take this up to an even further notch. If you do have pets, you may want to check your filter even more frequently than three months. If you check...

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During those cold winter nights, your heating, ventilation, and air conditioning (HVAC) system becomes the most valuable commodity in your home. But if it's running poorly, that means less comfort and higher energy bills for homeowners. Heating your home and producing hot water are generally the largest energy expenses for any homeowner, so you can ensure your home heating bill remains as reasonable as possible by supporting your HVAC system and keeping it running properly.

Complete these tips in the fall to help your HVAC system operate efficiently throughout the winter. This way, you can save money to be enjoyed in other ways during the holiday season.

Change the Air Filter and Clean the Vents

Changing the air filter every month is one of the most important things you can do to support your HVAC system. It's also one of the easiest. The filter should be checked every month and replaced if it is dirty. Filters should be replaced at the very least every...

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Frequently Asked Questions – If You’ve Got Questions. We’ve Got Answers!

Horizon Services, Inc. is the heating and air conditioning authority in Delaware, Southeastern Pennsylvania, South New Jersey, and Northeastern Maryland. Get answers to some of the most commonly asked questions about heating and cooling equipment, energy efficiency, air quality and maintenance below.

Q. What does HVAC stand for?
Heating, Ventilation and Air Conditioning.

Q. What regular maintenance do heating and air conditioning systems need?
The most important part of HVAC maintenance aspect is maintaining unrestricted air flows. Dust, dirt, and debris are an HVAC system’s worst enemies. Whether it’s an indoor or outdoor unit, you must keep all filters clean and heat exchangers and coils free of restrictions.

We recommend that your heating and cooling system be checked and serviced twice a year; ideally a spring and autumn tune-up. Also we recommend that you...

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Most traditional heating and AC thermostats have separate settings for heating, air conditioning, and the fan. The heating and AC settings are straightforward.

During the cold months, when you want to warm the house, you set the system to heat. In the summer when you want to cool, you set it to cool. During periods of the year when you need neither, you can simply set the thermostat to OFF to conserve energy.

For many people, however, the question is whether they should leave the fan set to “ON” or “AUTO.” The truth is, there is no right or wrong answer. Each option has its own pros and cons.

Setting the HVAC fan to ON

When set to ON, the fan will keep running 24/7, regardless of the heating or cooling setting.

The biggest advantage of this is that air will be pulled through your filtration system, thereby cleaning it so you’ll be breathing cleaner air around the clock. Keeping the fan ON circulates the air through your home so you don’t wind up...

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AC Troubleshooting Guide to Fixing a Constantly Running AC Unit

Mid-August and temperatures are in the 70’s? It makes you wonder if the dog days of summer are behind us or if they’ll be back with a vengeance next week. It’s a relief to have some cooler weather, but one thing that may put a damper on your comfort level is the sound of your air conditioner running constantly when you know it shouldn’t be.

When your air conditioner runs throughout the day and night without shutting off, or if it cycles on and off continuously, there are several causes for concern. More than likely you’ve got a problem with the unit. It’s also using way too much electricity and running up your electric bill. And don’t forget about the wear and tear on your air conditioner from all that unnecessary work.

Since the cool weather has ruled out the obvious, that it’s so hot outside that the unit NEEDS to run constantly to reach the set temperature, then you need to call in a...

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If you don’t want to turn on the A/C in your house, but want to at least keep the air flowing for a bit to reduce any stuffiness, here’s how to use the Nest Thermostat to manually run the fan from your HVAC system.

Most thermostats have a setting where you can run the HVAC fan only, but the customizations are rather limited, and you likely can only turn it on and off. There’s also usually an “auto” mode that turns it on whenever the A/C or heat is turned on. However, the Nest Thermostat comes with a lot more control when it comes to the system fan: you can manually turn it on from your smartphone, and even specify how long you want it on for.

From the Nest App

Open up the Nest app on your phone and select your Nest Thermostat on the main screen.

At the bottom, tap on “Fan”.

From here, you can get quick access to the fan timer and set it for a specific amount of time to be on. There are different intervals to choose from...

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I was at a dinner party last night and two guests described how their HVAC reps told them to run their furnace blowers 100% of the time. The HVAC reps reasons for the recommendation, as relayed by the dinner guests, were:

1. continuous running reduces the wear and tear on the blower motor that cycling on and off causes, thereby avoiding an earlier motor replacement

2. circulating the air around the home provides better balanced temperatures throughout the home and,

3. continuous air flow would provide cleaner air due to the continuous filtering.

We live in northern Michigan and are a heating dominate climate. I am curious to hear from the HVAC professionals about what they recommend to their clients and why. At the moment I don't buy the above arguments and feel those customers end up paying more in energy costs for little benefit. However I do understand there is no disputing tastes when talking about perceived comfort. Also if anyone knows...

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HVAC Unit Pricing

Homeowners have many brands of HVACs to choose from. Some of the most popular ones include:

Amana -- $3,900 - $4,800

Amana's Premium AGP15 Gas/Electric Package is a very popular model for all climates. It uses gas for heating and electricity for cooling. It also features a louvered compartment for the compressor to help protect it from the elements and from dust and debris. 15 SEER, 80% AFUE, available in 2 to 5 tons.

American Standard $3,800 - $4,900

American Standard's Gold line continues to be their best selling HVAC line. Sturdy steel construction with a variable speed fan helps protect the system while saving about 40% on your energy bill. A corrosion resistant blower ensures a long life for your system. 14.25 SEER, 80% AFUE, available in 2 to 5 tons.

Bryant -- $3,900 - $4,900

Bryant offers a high quality, economical model with their Evolution line. Bryant focuses on quiet comfort, delivering 40,000-100,000 BTU...

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1. MYTH: The bigger the air conditioner, the better it will cool my house.

BUSTED: Oversize units may create bursts of cold air, tricking thermostats or control systems into shutting off the system before the entire house reaches the desired temperature. This “cycling” may end up causing excess wear and tear on the unit, affecting your indoor comfort level, and influencing your overall energy costs.

When an air conditioner is sized and installed properly by a professional HVAC technician, it will cycle on and off at various intervals to maintain the temperature setting on the thermostat or control system. It is not unusual for an air conditioner to operate using long on and off cycles. In fact, this is preferred for energy efficient performance and humidity removal. When a unit is not properly sized and installed, the unit may cycle on and off quickly and quite frequently. This situation may not allow the unit to operate as efficiently as it was designed and...

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