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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:
Apr 12, 2019
On one of the coldest days of winter, our furnace stopped working. Our regular furnace company came and told us we had a CO2 leak and shut us off. Their quote for a new furnace was way too high and they couldn't even install it on the same day. TwinTech was recommended to us by a friend. We called and spoke to Dave who was very nice and knowledgeable. Grant showed up a short time later and a new furnace was installed the same day with no troubles at all. Best of all, we received a higher-end furnace than what was offered by our previous company and at a cheaper price. I would recommend TwinTech with no hesitation at all.
Apr 11, 2019
I installed a new furnace and Air conditioner with them. The installation is of high quality and according to standards. The guys are professional and reasonably priced.. I highly recommend them.
Apr 10, 2019
Had new furnace installed and ran into some difficulties but the contractor responded in a timely and efficient manner - after further service calls were made, a reasonable resolution was found.
Apr 8, 2019
The work was done quickly efficiently neatly and professionally. Pleased with the service, information, product, and the company.
Apr 1, 2019
Great sales member named Dave came in told us some amazing items and how they would be priced installed an all. We couldnt believe it! The next day the ac was installed, that day one employee named Greg told us that our furnace was working way to hard and was causing us to use way too much gas. So two days later they came in an installed a new furnace!
Apr 1, 2019
Installation was done quickly and professionally. The new furnace is quiet and provides even heat.
Mar 3, 2019
They removed and discarded old furnace. Installed new furnace. Installed air intake pipe, that had never been installed by builder, no charge. Replaced loose hose on floor with hard pipe and rerouted it to drain, no charge. Almost 33% cheaper then quote from Enercare, which was the company we dealt with and had insurance with for 8 years. No yearly fee for cleaning/insurance, saves 300 a year. Courteous, professional, fast, and friendly. My wife and I have been recommending them to everyone we know and meet, and will continue to do so. Thanks for everything, Twintech!!!
Mar 4, 2019
This company was great to deal with. Our furnace went down and they installed a new furnace the next day with a lot of professionalism!
Feb 22, 2019
Finally! An honest company with highly knowledgeable and informative staff. Had a furnace service and found multiply errors in our system from an amateur installer. Very fair price to correct problems and will definitely use again.
Feb 16, 2019
Had to replace the heating & a/c unit in a condo apartment dwelling. this company recommended by the property manager and president of the condo building. found their workmanship and attention to details very good and very thorough. were able to resolve small problems and situations and happy to feel the heat in my unit. it's pricey, but happy was done by a very professional service. thank you.
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