$49 / month O.A.C Including Install
$49 / month O.A.C Including Install

Guide to Replacing Your Furnace

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Guide to Replacing Your Furnace

Posted On: November 24, 2024

Guide to Replacing Your Furnace

Replacing your furnace is a significant investment in your home’s comfort and efficiency. Here’s a step-by-step guide to help you navigate the process:



1. Recognize When It’s Time for a New Furnace

  • Age of the Furnace: Most furnaces last 15–20 years. If yours is nearing this range, it may be time to upgrade.
  • Increasing Repairs: Frequent breakdowns or costly repairs signal it's more economical to replace than repair.
  • Higher Energy Bills: Older units are less efficient and may cause spikes in utility costs.
  • Inconsistent Heating: Uneven temperatures or cold spots in your home indicate reduced performance.

2. Choose the Right Furnace for Your Needs

  • Fuel Type: Common options include natural gas, propane, oil, or electric. Choose based on availability and cost in your area.
  • Efficiency Ratings: Look for high Annual Fuel Utilization Efficiency (AFUE) ratings. Modern units often achieve 90–98% efficiency.
  • Size Matters: A furnace that’s too large or too small will be inefficient. Consult an HVAC professional to determine the correct size for your home.

3. Plan Your Budget

  • Furnace Costs: Basic models range from $1,500 to $3,500, while high-efficiency models may cost $4,000 or more.
  • Installation Fees: Expect to pay $1,500–$2,500 for professional installation.
  • Rebates and Incentives: Check for local or federal tax credits for energy-efficient units.

4. Schedule a Professional Assessment

An HVAC contractor can evaluate your home’s heating needs, inspect ductwork, and recommend the best furnace options.


Questions to Ask:


  • How long will installation take?
  • Is the current ductwork compatible with the new system?
  • Are there maintenance or service plans available?

5. Prepare for Installation

  • Clear the Area: Ensure the space around the old furnace is accessible.
  • Plan for Downtime: Installation can take a day or more, depending on complexity.
  • Discuss Post-Installation Care: Understand the maintenance requirements of your new furnace.

6. Maintain Your Furnace

To extend the life of your new furnace:


  • Change filters every 1–3 months.
  • Schedule annual professional tune-ups.
  • Keep vents and registers clean and unobstructed.

Replacing your furnace not only improves your home’s comfort but also enhances energy efficiency and reduces long-term heating costs. Always consult trusted professionals and prioritize energy-efficient options for the best results.



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See What Our Customers Are Saying:

by Aaron on Twintech Heating and Cooling

We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.

by Linda on Twintech Heating and Cooling

Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!

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.

by Trevor Owens on Twintech Heating and Cooling

I returned from vacation to find my AC unit on the Fritz. After calling way too many places I connected with TwinTech. I’ve used the company in the past for my furnace so I was happy when I recognized Greg at my front door. He’s great and the service is always top notch. I’d highly recommend using twintech for honest, superior service in the Durham region. Thanks!

by Nicole Alain on Twintech Heating and Cooling

I called Twin Tech when my air conditioning stopped working. Greg came over to diagnose the issue - the same day. He was able to diagnose the issue and resolve it quite quickly. Although it was a quick fix, Greg was very thorough in explaining the issue and provided great advice. Not to mention, I felt very comfortable having Greg in my home - which I consider very important when hiring a service provider. Twin Tech will be my go-to from now on. Thank you!!

by Courtney Parkes on Twintech Heating and Cooling

Just hired TwinTech Heating & Cooling to do an A/C Unit removal & reinstall to allow for landscaping access on the side of my house, and they were wonderful!
Bob, Greg & Mitch make a great team! Quick appointment times, super knowledgeable, expert troubleshooting capabilities & very customer service oriented.
I would highly recommend them for all of your HVAC needs! Great job guys!!

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See What Our Customers Are Saying:

by Aaron on Twintech Heating and Cooling

We are very happy to recommend this company to everyone. Our furnace broke down on Sunday morning. We phoned them and before noon Grant the owner showed up. He worked on the furnace for about a hour not wanting to give up to fix the problem. The furnace was 17 years old. I was the one talking about replacing it. End result was the next day it was all done. On the Sunday Bob came over with heaters to warm up the house. We decided to replace the water heater at the same time. Thanks Grant for the excellent work. Thumbs up.

by Linda on Twintech Heating and Cooling

Right on time. Explained how to work the HRV in a different way so the house would not be so dry. Changed my whole house water filter for me as well. Friendly, helpful, caring service!

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!

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