What is the Difference Between 1 and 2 Stage Furnaces?

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What is the Difference Between 1 and 2 Stage Furnaces?

Posted On: February 11, 2024

What is the Difference Between 1 and 2 Stage Furnaces?

1-stage and 2-stage furnaces refer to the number of heat output levels the furnace has and how it operates to regulate indoor temperature.


Here's the difference between them:


1-Stage Furnaces: These furnaces have only one level of heat output, which is typically high.


When the thermostat calls for heat, the furnace fires up at full capacity until the desired temperature is reached, then it shuts off.


They operate in an all-or-nothing manner, meaning they are either on at full blast or completely off.


This can lead to temperature fluctuations and less precise control over indoor comfort.


1-stage furnaces are generally less expensive upfront compared to 2-stage furnaces but may result in higher energy bills due to frequent cycling on and off.


2-Stage Furnaces: These furnaces have two levels of heat output: high and low.


When the thermostat calls for heat, the furnace first activates at a lower capacity (low stage) to maintain a steady temperature.


If additional heat is needed to reach the desired temperature, it switches to the higher capacity (high stage).


They provide more precise temperature control and reduce temperature swings because they can operate at a lower output level for longer periods, maintaining a more consistent indoor temperature.


2-stage furnaces are typically more energy-efficient than 1-stage furnaces because they can run at a lower capacity for longer periods, consuming less energy overall.


Although 2-stage furnaces are usually more expensive upfront compared to 1-stage furnaces, they can potentially save money on energy bills over time.


In summary, the primary difference lies in the number of heat output levels and how they regulate indoor temperature, impacting comfort, energy efficiency, and upfront cost.


Contact Twintech today at 1-844-894-6832



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by Private User on Twintech Heating and Cooling

Flawless transaction. They did exactly what they promised, showed-up on time, cleaned-up, and were highly professional. Highly recommended.

by Bill Edmondson on Twintech Heating and Cooling

Salesperson and 2 man installation team were all professional and
knew their stuff. All three were friendly and helpful, answering all
my questions. The quality of their work demonstrated their experience
and expertise in their field.

by Private User on Twintech Heating and Cooling

A dear late cousin of mine recommended this company and I have been happy with the service.

by Private User on Twintech Heating and Cooling

We are very pleased with the work done by Twintech. They were very professional from start to finish. Dave came to our home and gave us a very competitive quote for new high efficiency furnace and air conditioner. The installers were very courteous and professional. We would highly recommend them.

by W1n5t0n1987! on Twintech Heating and Cooling

Great experience getting an old furnace replaced.
Sales Guy (Dave) was great - honest, responsive, and friendly.
The work itself was done quickly and we are very happy with the outcome, thank you! We recommend TwinTech!

by Private User on Twintech Heating and Cooling

This review is late coming so my apologies to the amazing Twin Tech team! I contacted Dave at Twin Tech for a quote this past Feb (as I was collecting a few) and his recommendation was excellent. From the first meeting with Dave to the team installing the new furnace, not once did i feel uncomfortable . The team were extremely professional yet personable and clean and tidy. Decent companies still exist!
The new furnace just purrs and its just amazing the difference it has made!
(PS my sibling ended up getting a furnace from them as well)

by Private User on Twintech Heating and Cooling

The service was Twintech was excellent.
Dave our salesperson was easy to talk to and was professional. The unit recommended meets our needs and budget.
Greg and his team arrived on time for the installation and even got rid of the garbage the contractors left in our furnace.
Would definitely recommend Twintech.

by Steve V, Toronto on Twintech Heating and Cooling

Our old water tank was installed in 1997. Wasn't working as well as it should so we looked into a tankless as it is more efficient and a space saver! we had used Twintech in the past for a furnace cleaning and were satisfied with that so we decided to ask for a quote for the changeover. Gary arrived and provided the options and the quote fit within our budget so we decide to go with them after receiving a few alternative quotes from other companies. They did what the said would be done and it was completed within a reasonable time frame! Removal and cleanup of the old tank was seamless. We are now enjoying consistent and efficient Hot water! I recommend Twintech and would use them for future projects!

by New AC Unit + Humidifier on Twintech Heating and Cooling

One of the most honest HVAC companies out there! Dave was very helpful and informative in helping us choose a new AC unit. While they weren’t the lowest quote, we went with them because we trusted Dave and he was the most honest guy out of the companies that quoted us.
Greg and his crew who installed the unit were very professional and did a great job. If I could do it over again I would choose Twintech again.

by Private User on Twintech Heating and Cooling

Relocated and replaced our air conditioning unit. Fast, professional, and high quality service. We would definitely use them again for future projects!

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