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Common Mistakes When Getting a New Furnace
Posted On: March 20, 2025
Here are some common mistakes people make when getting a new furnace, and how to avoid them:
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Choosing the Wrong Size
A furnace that's too big will cycle on and off frequently, leading to uneven heating and higher energy bills. Too small, and it’ll struggle to keep your home warm. Make sure to get a proper load calculation from an HVAC professional to find the right size for your space.
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Focusing Only on Price
A cheaper unit might save you money upfront, but it could cost you more in the long run through higher energy bills and repairs. Energy efficiency (measured in AFUE ratings) and reliable brands should be part of your decision too.
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Ignoring Energy Efficiency
Modern furnaces can have AFUE ratings of 90% or higher — meaning they convert most of their fuel into heat. Opting for a lower-efficiency model might seem cost-effective now but could waste more energy (and money) over time.
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Skipping Professional Installation
A furnace is only as good as its installation. Poor setup can lead to safety hazards (like carbon monoxide leaks), reduced lifespan, and inefficient performance. Always hire a licensed, experienced HVAC technician.
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Forgetting About Ductwork
If your ducts are old, leaking, or improperly sized, even the best furnace won’t perform well. Ensure your ductwork is inspected and sealed properly for maximum efficiency.
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Not Considering Maintenance Needs
Furnaces need regular maintenance to stay efficient and safe. Don’t forget to schedule annual inspections and cleanings, and change the air filter regularly to keep airflow strong and clean.
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Overlooking Rebates or Financing Options
Many energy-efficient furnaces qualify for rebates from utility companies or manufacturers. Plus, financing options might make a better model more affordable.
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Ignoring Indoor Air Quality
A new furnace is a good time to think about air quality improvements, like adding a humidifier, air purifier, or better filtration system, especially if anyone in your home has allergies or asthma.
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See What Our Customers Are Saying:
Jan 1, 2015
Dave was great in helping me get the proper units for my property, as well as getting them installed. The installers arrived when they said they would, and completed the project on time, and professionally. If I needed another furnace, I would use Dave again.
Jan 1, 2015
I have known Greg and Grant Dainty for many years and have used their company for my house and business. I recommended them also for my parents and sister and they all have been very satisfied with the quality of work for a reasonable price. I just recently had them install a new HVAC system in an older house and was very pleased with their work. Craig in Pickering. After meeting with various heating and air conditioning contractors I was referred to Twin Tech Heating and Cooling through a family member. Greg and Grant arrived at my home and provided me with an estimate and a plan as to how they were going to remove and replace my furnace and air conditioner. On the day of install Greg and Grant arrived at my home on time and were very professional and extremely courteous as to any questions or concerns that I had. The removal and install was truly professional and the attention to detail was exactly what I was looking for. Ive seen many installs from other contractors and I couldnt be any happier to have had such a clean looking install. The sheet metal work, ducting and venting all look fantastic. Upon completion Greg and Grant left me feeling extremely happy and very fortunate of a job well done. Thanks again Twin Tech!!
Jan 1, 2015
My old furnace had finally broken down for the last time when contacted twintech to have a new furnace installed They were prompt, knowledgeable and very reasonably priced. They did such a great job i tell all my friends and family about this company.
Jan 1, 2015
To whom it may concern, I recently had TwinTech (Greg and Grant Dainty) replace my furnace and service both my gas fireplaces and air conditioning unit. They were professional, courteous and very fair in their pricing. I would gladly recommend TwinTech to anyone needing work done. I can be contacted at 905-626-XXXX.
Jan 1, 2015
My Fiancé and I have relied on Twintech Heating and Cooling now for the better part of the last 10 years. In that time, Greg has installed a furnace, an air conditioner, and a heat-pump at our residence in Toronto. In each instance Greg and his team were a pleasure to deal with. They were courteous and professional throughout the whole process and the quality of their work is first rate. Our experiences have always been extremely positive and we have referred his services numerous times to our friends and family. Without hesitation, I would recommend Greg and TwinTech Heating and Cooling to anyone looking to service or replace their existing heat/AC equipment
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