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NextDoor Award won!

NextDoor Award won!

Thank you so much to all of our customers who have nominated us and recommended us to friends and family!  Because of this we have won the Neighborhood Favorite on NextDoor!  We always strive to serve our customers with integrity, fairness and reliability.  We are so thankful to our customers for all of your recommendations!

Leaving for a vacation this Holiday? Read about Smart thermostats and why they can help you while you are gone!

Leaving for a vacation this Holiday? Read about Smart thermostats and why they can help you while you are gone!

There isn’t a shock to the system quite like arriving home from a tropical vacation in the middle of winter to a frigid house. Calling a technician to take a look, hoping your pipes don’t freeze … such a major inconvenience when you just want to unpack and try to adjust to the sudden temperature change. If only there was a way to know when your furnace goes out when you’re not home. Well, one of the great things about technology is that now, with a smart thermostat, you can be notified if your heating or cooling systems malfunction at any time.


Smart thermostats allow you to control your home’s temperature from just about anywhere. Plus, these energy-efficient thermostats qualify for rebates from ComEd, which means that in addition to the savings on your heating and cooling bills, the thermostats themselves are quite affordable.


Our preferred brand of smart thermostat is ecobee. The ecobee SmartThermostat with voice control has state-of-the-art SmartSensor with temperature and occupancy detection, built-in Amazon Alexa and an intuitive smartphone app, which all deliver control over your comfort and your home. The ecobee has a glass touch display, powerful processor, Wi-Fi, and voice detection. Read on for more about the amazing features of this high-tech device. 


  • You can use Alexa to control your ecobee SmartThermostat and call or connect to other smart devices — all with the power of your voice. Ask Alexa to do things like: set the temperature, read the news, set a timer, and more. Pair with a Bluetooth speaker for the ultimate audio experience.
  • By reducing wasted energy in your home, you can save on your heating and cooling costs. The ecobee SmartThermostat is ENERGY STAR® certified, which means that it meets the energy efficiency requirements set forth by the EPA.
  • Control your ecobee from anywhere using your Android or iOS devices. The ecobee also Integrates perfectly with your favorite smart home systems including the Google Assistant, Apple HomeKit, Amazon Alexa, Samsung SmartThings, and IFTTT.
  • With Bluetooth wireless technology and the ability to stream Spotify, it’s the smart thermostat that takes music seriously. ecobee has embedded microphones with far-field voice recognition and a speaker engineered for clear voice and full sound. Unlock the ability to play music simultaneously between all your multi-room compatible speakers.
  • If your ecobee senses that you are home during your scheduled Away period, or away during your scheduled Home period, it will automatically override your schedule to maximize comfort and savings.
  • ecobee is constantly monitoring your equipment performance and will send you an alert if anything is not working or is performing sub-optimally. Similarly, ecobee can show you free energy reports that track how much energy you’ve conserved each month and provide insight into your home heating and cooling equipment.
  • ecobee SmartSensor is the thermostat room sensor that can be paired with any ecobee thermostat to unlock the full potential of your ecobee experience. It detects both temperature and occupancy, allowing for targeted temperature control in important rooms and a target average temperature across multiple rooms — meaning enhanced overall comfort for your whole home. Plus, SmartSensor can help further your home’s energy efficiency by signaling your thermostat to start saving when you’re not home, keeping your energy bill in check. 


If you’d like to learn more about the benefits of installing a smart thermostat, give us a call today.

Dickens in Dundee

Dickens in Dundee


Looking for a festive and charming event for your family to kick off the holiday season? Check out Dickens in Dundee, which is celebrating its 32nd year this coming weekend, December 6th and 7th! What started in 1988 as a small community gathering with caroling and searching for Tiny Tim’s crutch in the local stores has grown to a weekend holiday festival supported by various businesses and groups in both East and West Dundee.


Many organizations have been responsible for keeping Dickens in Dundee going over the years, including the Dundee Jaycees, the Dundee Lions Club, the Dundee Historical Society, local churches, lots of community volunteers, and of course, local businesses like Leith Heating and Cooling!


The weekend kicks off on the first Friday in December with tree lightings in both East and West Dundee. Stroll through both downtown areas and see local merchant’s windows “come alive” during Living Windows. Come and see your favorite HVAC guy,Brian,  playing the fiddle at the RocHaus at 8pm in Controlled Burn! Saturday morning starts with the Spirit of Christmas Parade, which begins at Second Street in West Dundee, travels across the Main Street Bridge into East Dundee and ends near the Dundee Township Visitors Center (The Depot) on River Street. Other popular events include Gingerbread House Making, the Festival of Trees in Graffelman Park, and breakfast Santa Claus himself! 


Visit for a full schedule and more information!

Why might I need a chimney liner?

Why might I need a chimney liner?

Why might I need a chimney liner?

If you live in an older home (30 years or older), the chimney on your house has probably worked just fine for years and you may wonder why you’d suddenly need a flue liner when you replace your furnace.

Most older flues are masonry, either brick or clay, and were sized and designed for furnaces and water heaters that were anywhere from 45-65% efficiency. Because of the low efficiency of the furnace, high volume and high temperature flue gases from the equipment kept the flue warm and dry.

A lot of mid-efficiency 80% AFUE furnaces generally have lower volume and lower temperature exhaust. Many are still vented into existing flues and, because of the lower temperature, the acidic moisture from the flue gas can condense out and collect on the porous masonry, eating it away. High-efficiency 90+% AFUE condensing furnaces are usually vented separately to the outside using PVC (vs. through an existing chimney), and tend to leave the water heater venting alone into the flue. Water heaters have very low volume and low temperature flue gas and, like mid-efficiency furnaces, the same masonry damage can happen.

Installing a flexible liner is the best way to protect your existing masonry or clay chimney by providing a barrier from the flue gases and moisture. Older chimneys can often have cracks and flue liners help eliminate danger from preventing leaking gases.

“To Cover or not Cover, that is the question.”

“To Cover or not Cover, that is the question.”

To cover or not to cover — that is the question. We get this question often from customers wondering if they should cover their outdoor air conditioning unit during the off-season. It seems to make sense to cover your compressor when it’s not in use. After all, people cover outdoor lawn furniture, swimming pools, and even cars to protect them from the elements. But you might be surprised to learn that, for the most part, we advise our customers NOT to cover their air conditioning units. And here’s why:


  • Outdoor air conditioners are made to withstand harsh winter conditions and temperature extremes. They are built tough, and don’t generally need a cover.
  • Covers can provide a nice cozy place for chipmunks, mice, and other critters to move in for the winter, which can lead to chewed wires and nests that hold moisture, cause corrosion, and ultimately need to be cleaned out. 
  • A cover traps moisture inside the unit, increasing the likelihood of corrosion, rust, and mold.
  • While a cover might keep heavy rains from getting into your air conditioner, it will not keep out moisture in general. Humidity in the air and evaporation from the ground will find its way in, and a cover will only keep it in.


We might advise using a cover in the following situations:

  • If your unit is located under a tree with small leaves/needles, like a pine tree. These can collect inside the unit, creating moisture/corrosion and creating a barrier to normal moisture drainage your system may have built in. In this case, we might advise you to cover your unit in the fall, but then uncover it in the winter/spring
  • When hail is expected. Hail can cause damage to the condenser coil fins  and bang up the unit in general. However, hail storms are hard to predict and we do NOT recommend going out to cover your unit once the storm starts! Stay inside where it’s safe!
  • When a blizzard is coming. We would advise covering before a big snow, and then promptly uncovering afterwards, to avoid the melting and refreezing of snow inside the unit, which could lead to damage to the coils.


If you are going to cover:

  • Get a tight-fitting cover, and perhaps one that doesn’t go all the way down the unit. You want to avoid having moisture build up inside.
  • Do not use a tarp and bungee cords, or something that is not breathable, properly fitted and secured.
  • Get a cover with ventilation that helps prevent condensation from forming inside the unit, which can cause corrosion on electrical components and connections.


Our expert technicians at Leith Heating and Cooling are happy to advise our customers on whether to cover or not to cover — give us a call!

Since Freon is being phased out, what will it be replaced with? Can I just use that new chemical in my older system? FREON Part 2

Since Freon is being phased out, what will it be replaced with? Can I just use that new chemical in my older system? FREON Part 2

So, “what is next” you ask since R-22 is being phased out??  Well, with the ban of freon (HCFC-22 or R-22), new chemicals have taken its place. The chemical that will most often be used in newer air conditioners is R-410A, a safer, compliant refrigerant.

You cannot simply use R-410A in older systems designed for Freon, because R-410A operates at a higher pressure than other refrigerants. R-410A systems require service personnel to use different tools, equipment, safety standards, and techniques. Equipment manufacturers are aware of these changes and require the certification of professionals installing R-410A systems.

If you decide to replace your system now, here are some things to make that expense a bit easier to take:

  • The new environmentally-friendly R-410A systems have a much smaller carbon footprint; they do not harm the ozone layer.
  • New energy-efficient systems save on energy costs. Even if your existing system is only 10 years old, you may save significantly on your energy costs by replacing it with a newer, more efficient model.
  • Most new systems come with a warranty – standard!

If you have questions about your existing air conditioner, or would like a quote on replacing your system, please call us at 847-851-8698!

Is the US phasing out FREON and will I have to upgrade my AC system? Part 1

Is the US phasing out FREON and will I have to upgrade my AC system? Part 1

We got a lot of questions this summer about Freon, so we thought that we would send out some information in our latest blog.  Freon (also known as R-22 or HCFC-22) has been identified as one of the main causes for ozone depletion for the environment, because it contains chlorine that damages ozone molecules. The United States has been taking steps to phase out this chemical for the past 30 years. In 2010, the USEPA banned companies from building or installing systems that have been pre-charged, or filled, with Freon and set a 10-year end date for the chemical itself. As of January 1, 2020, HCFC-22 (FREON) will no longer be produced or imported in the US.

However, manufactures found a loophole and still produced equipment that used Freon. These units were known as “dry-shipped”, which means they were not pre-charged or filled up with Freon, so technically did not violate the new restrictions. Many manufactures sold these types of units through 2018 and, unfortunately, a lot of HVAC companies continued to install these units to the long-term disadvantage of their customers. Leith Heating & Cooling did not adopt this practice and in fact only installed a single “dry-shipped” unit with full disclosure to the customer.

If your system was manufactured and installed after 2010, chances are you should be fine unless you had a dry-shipped unit installed. If your current system is still using Freon, then you will eventually have to get a new system. For now, you can still use Freon, but with the US no longer producing or importing it, it’s going to get quite expensive and hard to find. It will only be available through after-market sales, as it is recovered from older, salvaged systems.

To check your system, look for a sticker on the side that shows whether your system uses HCFC-22 or R-22 – these are the chemicals being phased out.

In general, owners of R-22 air conditioners will have 3 choices:

  1. Do nothing until your system needs an expensive repair.
  2. Retrofit (or convert) your old R-22 equipment to use an existing refrigerant.
  3. Replace your system proactively.


If you choose to keep your older system for the moment, the best thing you can do is to keep it well maintained, to ensure there are no freon leaks.

What To Do When Your Air Conditioner Won’t Turn On

One of the worst things that can occur during summer is when you are going to turn on your air conditioner and discover it isn’t working. This can be very stressful, especially on a relatively warm day. However, you should refrain from trying to fix it yourself due to the great possibility of the issue becoming worse. Often, HVAC technicians will evaluate the problem and notice it could have been prevented with proper maintenance or repair.

If your air conditioner is not working properly or won’t turn on, here is what you should do:

Do not try to fix the problem yourself:

Poking around your air conditioning unit is not only dangerous, but can also lead to more significant issues.

Keep cool:

While you are waiting for your air conditioning unit to turn back on, it is important to stay cool. Opening windows and having fans on around your home will allow you to stay comfortable while your air conditioning is off.

Hire a certified HVAC technician:

It is essential to hire a professional to diagnosis, evaluate, and solve the issue regarding your air conditioner. Leith HVAC is the best company for you to choose with quick response time and effective solutions.

To learn more about what to do when your air conditioner won’t turn on or to get in touch with one of our technicians, contact Leith HVAC today.