Purl's Sheet Metal & Air Conditioning Blog: Archive for the ‘Heating’ Category

What Does a Furnace Limit Switch Do?

Monday, November 28th, 2022

Gas furnaces work on a basic principle: lit gas flames heat air that is blown through the furnace and into the rooms through ductwork. But gas furnaces are complex devices that have several safety features and mechanisms that allow them to work correctly and without creating hazards.

One of the key components for the operation of a furnace is the furnace limit switch. You don’t need to know all the details about this part, but understanding the basics will help you know more about how your furnace works—and why it sometimes doesn’t work.

Tags: Fresno, Gas Furnaces, Heating System Maintenance
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Understanding SEER, AFUE, and Other Efficiency Ratings for HVAC Systems

Monday, March 7th, 2022

Spring is approaching, and this is a time of year when many homeowners start to consider what upgrades or replacements they might need for their heating and air conditioning systems. You may have just gone through a winter with a furnace that was underperforming because of its age. Or you might know that your current air conditioning system isn’t up to handling another summer in the Central Valley.

You’ve come to the right people when it comes to great AC and heating in Fresno, CA. Our team can guide you through the process of replacing an older system if that’s the best choice for your house. One tricky part of getting a new HVAC system for homeowners is understanding the different efficiency ratings and what they mean. We’ll run down the three major ones you’ll need to know for heating and air conditioning.

AFUE

This is a rating used for furnaces. It stands for annual fuel utilization efficiency, and it’s expressed as a percentage. The percentage tells you how well a furnace converts its energy supply into heat. A gas furnace with 90% AFUE will turn 90% of the natural gas it burns into heat for the home, and the remaining 10% will escape the furnace as exhaust.

As of 2013, the minimum requirement for a furnace to receive the ENERGY STAR label from the Department of Energy is 80% AFUE. Many furnaces will score higher than this. High-efficiency condensing furnaces can have AFUE ratings in the high 90s, but they cost more to install. All electric furnaces have AFUE of 100%, but that’s because they don’t lose heat to exhaust. Electric furnaces will still cost more to run on average than gas furnaces because electricity is a more expensive energy source.

SEER

SEER (seasonal energy efficiency rating) is used for air conditioning systems and heat pumps when in cooling mode. It’s the ratio of the amount of heat a unit removes from the air in BTUs to the amount of electricity consumed in watt-hours, as measured over a full season of cooling. (There’s another rating, EER, which is done with only a single test.) The higher the SEER rating, the more efficient the unit. The current ENERGY STAR requirement for air conditioners and heat pumps is SEER of 14.5 or higher. High-efficiency units, such as variable flow refrigerant air conditioners, can have SEER in the 20s.

HSPF

This is a rating specific to heat pumps. Heat pumps work in two modes, heating and cooling, and have different ratings for those modes: SEER for cooling and HSPF for heating. HSPF stands for heating seasonal performance factor and is the ratio of the amount of heat brought into a house in BTUs to the amount of electricity consumed in watt-hours, measured over a full season of heating. HSPF is always lower than SEER for a unit, as heat pumps are less efficient in heating mode. The ENERGY STAR minimum for HSPF is 8.5.

The efficiency of any new system you have installed is important, but it isn’t the only factor. You’ll want the help of our professionals to find the ideal unit to provide comfort to your house as well as energy savings.

Call Purl’s Sheet Metal & Air Conditioning when you’re interested in a new HVAC system installation. Uncompromised Quality & Customer Service Since 1952.

Tags: Air Conditioning Installation, Fresno, Heating System Installation
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Can I Save Money on Comfort by Closing Room Vents?

Monday, February 21st, 2022

Many room vents connected to a home’s ventilation system have shutters on them to alter the direction air enters a space. These shutters can also be pushed to close the vent, leading people to believe that they can shut off heating or cooling to a room this way and save money. If the vent doesn’t have shutters, they may try putting an object in front of it to block it and achieve the same effect.

We’ll explain below why doing this doesn’t work, and why it creates problems for your HVAC system. But don’t despair—we’ll have some suggestions at the end for how you can better control home heating and cooling to increase energy efficiency.

Tags: Fresno, Zone Control Systems
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Is It Too Late to Have Heater Maintenance?

Monday, February 7th, 2022

We’re now well into the winter, although recently we’ve experienced a warm weather stretch. Still, you’ve almost certainly had your furnace or other heating system running—and we hope that during the fall you remembered to call us for heating system maintenance in Fresno, CA. Routine maintenance is still the best way to prevent repair problems, drops in heater efficiency, early system replacements, and safety worries.

However, if you didn’t remember to have maintenance before the winter started (we understand that life gets busy!), please don’t think that you missed a window of opportunity and it’s just too late to have it done now. But it isn’t! There’s no such thing as an expiration date for heating maintenance—the only requirement is that it gets done annually. Call us to sign up for our Ultimate Service Agreement and we’ll see you get on the schedule for a maintenance inspection and tune-up.

Tags: Fresno, Heating System Maintenance
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How Does Electronic Ignition Work in a Furnace?

Monday, January 24th, 2022

The natural gas furnace has been common in homes since the 1940s. Until fairly recently, these furnaces used a standing pilot light to ignite the gas burners at the start of their heating cycle. The pilot light would maintain a small flame throughout the heating season so whenever gas flowed to the burners, the pilot would immediately ignite them.

There are still furnaces in use today that have standing pilot lights, but they’re becoming rarer each year. Most natural gas furnaces have changed over to using electronic ignition systems instead. The reason for the change is to make furnaces more energy-efficient as well as more reliable. A pilot light that burns for the whole winter is an additional drain on natural gas, while an electronic ignition system only needs to use power at the moment it ignites the burners.

How does electronic ignition work? There are two general types of electronic ignition systems found in furnaces: hot surface ignition and intermittent pilots.

Tags: Fresno, Gas Furnaces
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Off to a Slow Start … Is Your Furnace Not Giving You Enough Heat?

Monday, November 1st, 2021

As we move into the colder months of the year, your furnace will begin running more often. You’ve probably already had it on a few times—and we hope you’ve called us to arrange for heating system maintenance. (If not, now is a great time to have it done!)

You may notice as the winter starts that your furnace isn’t living up to expectations. There are cold spots in rooms, the general household temperature feels lower, and you have to fiddle around with the thermostat to get enough heat. These are all warning signs you may need furnace repair in Fresno, CA, and we don’t recommend you wait long to call us to schedule them. What might seem like a small trouble can balloon into a larger one, and you also want to avoid any potential safety hazards.

Below we’ll look at why your furnace may be off to a slow heating start.

Tags: Fresno, Heating System Repair, Heating System Replacement
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October Is the Time for Your Regular HVAC Maintenance

Tuesday, October 19th, 2021

October is the month when people start to consider using their heating systems for the first time since, well, probably spring. That means it’s a good month for homeowners to schedule their annual heating maintenance visit.

Maintenance is one of the most important services we offer our customers, and we don’t want you to forget to arrange for it. We know you may be busy with Halloween celebrations and preparations, but the small amount of time it takes to schedule the work and have our technicians do it is incredibly valuable.

Tags: Fresno, Heating Maintenance
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The Improvements of Getting a New Furnace Installed

Thursday, March 4th, 2021

If you use an old gas furnace for your household heating in Madera, CA, have you started to consider getting a replacement? We recommend replacing any aging heating system before it starts to go into a decline. It’s not a good idea to let a furnace run and run until it fails. This is not only inconvenient (nobody wants to have to scramble to replace a dead furnace in the middle of winter), it also means the furnace will waste more and more energy during its final downward spiral.

There are other reasons to go ahead and replace an aging furnace while it’s still (outwardly) working okay. Newer furnaces contain several improvements that can help you enjoy better performance and energy efficiency with your home heating than ever before.

Below are several ways modern furnaces conserve energy. Not all furnaces have these same additions: ask our technicians about the different options available.

Tags: furnace replacement, Heating System Replacement, Madera
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Why Is My Furnace Making That Noise?

Tuesday, February 16th, 2021

If you’re asking this question, you’re already on the way to solving the problem. That you’ve noticed the furnace is making an odd sound is good news—not for the furnace, but for timely heater repair in Fresno, CA. The sooner you detect a strange sound coming from the furnace, the sooner you can call our technicians to investigate it and find out what repairs may need to be done. It always pays to move fast on potential furnace problems because it helps avoid safety concerns, the trouble getting worse, a more expensive repair, or the furnace breaking down entirely.

A malfunctioning furnace can make several types of noises. Below we’ll look at some of the more common. Please leave the actual diagnosis of the malfunction to our professionals, however.

Tags: Fresno, Furnace Repair, Heating System Repair
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Advice on Energy-Saving Thermostat Settings for Your Heating

Monday, January 11th, 2021

We want you to enjoy the best possible heating in Fresno, CA or wherever you live in the Central Valley each winter. We’ve served the area for many decades and are dedicated to providing the best in heating repair, replacement, and maintenance. But sometimes what our customers need the most in the moment is good, old-fashioned advice about running their heating systems.

For example, we’d like to give you advice on how best to set your home’s thermostat during the winter so that you save money—without having to freeze! Thermostats can be as simple as a manual dial or as intricate as state-of-the-art Wi-Fi “smart” models, but at the core, they are about setting a target temperature in the house for the heater to reach. Let’s look into what settings are best for lowering costs.

Tags: Fresno, heating tips
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