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Common Mistakes When Getting a New Furnace

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Common Mistakes When Getting a New Furnace

Posted On: March 20, 2025

Common Mistakes When Getting a New Furnace

Here are some common mistakes people make when getting a new furnace, and how to avoid them:


  1. 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.


  2. 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.


  3. 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.


  4. 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.


  5. 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.


  6. 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.


  7. 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.


  8. 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:

by Private User on Twintech Heating and Cooling

Twintech promptly responded to request for quotation. They were thorough and helpful in explaining options. The quote was very competitive. Installation of new furnace was very professionally completed. Excellent work.

by Rita, Scarborough on Twintech Heating and Cooling

When our old oil furnace finally broke down we decided it was time to finally convert to natural gas and finally install central air conditioning at the same time. Knowing it was going to be a significant investment for us, we wanted to make the right choice. Twintech came highly recommended by a friend and we were not disappointed. From the first contact with the salesperson, until the final touches on the installation, we were so pleased with their service. Everyone from the company was so friendly, efficient and a pleasure to deal with. Best of all, the cost was very competitive. We would certainly recommend Twintech to anyone requiring HVAC work in their home.

by Bob S, Pickering on Twintech Heating and Cooling

Mitch from Twintech came out for our annual furnace inspection. We found him to be friendly, conscientious & he left the work area clean. We were also very impressed with the thoroughness of the job he did. This is the 2nd job we’ve had Twintech do for us & have been very happy with the results for each. We highly recommend this company. Thank you, Mitch, Dave & Greg.

by Brent L on Twintech Heating and Cooling

Work was done on schedule, professionally, according to quote and with minimal inconvenience to building users. Very happy with the end result. The only area for improvement from my experience - need more timely quoting process.

by Karen on Twintech Heating and Cooling

The team was great! Very knowledgeable, professional and extremely helpful. A few days after install the unit didn’t seem to be working, user error, but within minutes of contacting them..on a Saturday.. a tech was on the phone troubleshooting with us. I highly recommend Twintech for your cooling or heating needs. They stand by their products and a pleasure to deal with.

by Rob on Twintech Heating and Cooling

During the hottest week in the summer our old A/C decided to call it quits. I called Twintech Heating & Cooling after receiving a referral from a family member; came highly rated for being an honest, family-run business, who appreciates their customers. Dave was able to accommodate my hectic schedule and book a late evening appointment to walk through the specifics. Greg and Mitch arrived exactly on time a few days later, were very polite and friendly, and within a couple of hours had a new unit up and running. I also received a follow-up call to ensure we were happy with the Amana.

by Linda Robinson on Twintech Heating and Cooling

They were on time and very professional. I'm so glad I decided to go with Twintech, thanks!

by Famcam1953 on Twintech Heating and Cooling

Timely and appreciated - this was during the hottest days this year when our Air and Furnace way.
Efficient. Professional. No BS or overselling. What was promised, was delivered at a cost-effective price point.
Down to earth.

by DG Sellers on Twintech Heating and Cooling

Professionally done and took care to cover all entry floors to the house for the installers to remove the old furnace and install a new furnace.
I also made recommendations of the tankless water heater that we had installed and items to address. We did not know they also installed tankless water heaters.

by Bill, Pickering on Twintech Heating and Cooling

Price was not the cheapest nor the most expensive of my quotes. It's the quality of the installation that makes for a good AC system. The twins' knowledge & professionalism was evident in the small details:
Very clean work. Greg made sure that the refrigerant level & temperature were correct. They reinstall the insulation & vapor barrier around the wall. The outside electrical cords were secured to the wall. Proud to support this local company. Thank you.

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See What Our Customers Are Saying:

by Robert Rogers on Twintech Heating and Cooling

Very pleased with the professional service that TwinTech Heating and Cooling provided in replacing my furnace. I got several quotes from different service providers. Their price was excellent and they explained the features very well. We are very glad we went with TwinTech and highly recommend their services.

by Robert Mizuno on Twintech Heating and Cooling

We were new homeowners in need of a second opinion. TwinTech Heating & Cooling were Amazing and professional. Very knowledgeable and great service all around. Recommend to anyone looking for honest and reliable services. Treated with respect and care. Thank you Greg, Mitch and Bob!

by Ruth on Twintech Heating and Cooling

TwinTech is an excellent and honest company! I called them for a second opinion after being told by another company that I needed to replace my furnace. Turns out this was not the case at all! I did not need a new furnace. TwinTech did not push to make an unnecessary sale and saved me from a huge expense. Bob and Mitch were extremely professional and above all honest! I definitely recommend TwinTech!

by Anna Chin on Twintech Heating and Cooling

Amazing experience with TwinTech Heating & Cooling! Their team was professional, knowledgeable, and efficient from start to finish. They installed my new furnace quickly and left everything spotless. The technicians took the time to explain everything and made sure I was comfortable with the system before they left. Great customer service and fair pricing. I highly recommend them for anyone needing HVAC services!

by Connor Agnew on Twintech Heating and Cooling

Great experience all around. Bob was sharp and easy to talk to, and Greg handled the installation perfectly. Would hire them again in a heartbeat.

Benefits of a Humidifier

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - April 8, 2020

Have you ever found the air in your home to be stuffy, do you or your family suffer from dry skin or have a cough that won't go away If the answer is yes, then you need a humidifier.Humidifiers work by adding moisture to the air, and they should be

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3 Must Have Services for Quality Air Conditioning

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - June 9, 2021

Thank goodness that you do not have to open the windows in your home to cool your home or to light fire in the fireplace to warm you home. Air conditioning services heat a home during winter and cool it during summer. You only need to press a button

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Does a Furnace Reduce its Efficiency as it Ages?

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - February 9, 2024

Yes, a furnace can experience a reduction in efficiency as it ages. Several factors contribute to this decline. Wear and Tear: Over time, the components of a furnace, such as the heat exchanger, blower motor, and igniter, can wear out or become

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Maintaining Efficiency and Heating in Your Furnace

  • SUBMITTED BY:
  • TWINTECH HEATING & COOLING
  • - December 4, 2024

Maintaining your furnace’s efficiency and ensuring it provides optimal heating is crucial for comfort and cost savings during the colder months. Here’s a guide to help you keep your furnace running smoothly: 1. Regular Maintenance is K

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