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What is the Difference Between Single-Stage, Two-Stage, and Modulating Furnaces?
Posted On: January 8, 2020
When you are looking around for a new furnace, you will come across three different types: single-stage, two-stage and modulating. You may probably ask, what are the differences between them, and which one is right for your home?
In this article, we will explain the differences between them and help you decide which furnace works best for you and your family.
Single-Stage Furnaces
Single-stage furnaces only have one setting, which is high heat. On a call for heat, they immediately start running at full capacity, no matter what the temperature is outside until the signal coming from the thermostat is turned off. These types of furnaces are best suited for budget-conscious consumers, so in the long run, the upfront cost savings are not realized.
Two-Stage Furnaces
A two-stage gas furnace has two settings, high fire and low fire, and here is how it works. Most of the time, on a typical heating cycle the furnace will start out running on low fire, consuming less gas and electricity, while at the same time providing heat and gaining inefficiency. After approximately 7- 10 minutes of operation, the furnace begins to operate very efficiently because it is fully warmed up. Then, it will jump up into high fire and finish out the heating cycle at full capacity. Control of the high and low burner timing are made by the installers, as part of a new furnace installation.
You could also control the 2 stage burner by using a 2 stage thermostat, the effect of either is similar. Two-stage furnaces are considered more energy-efficient than single-stage because they are not always running at a full heating capacity of the appliance and are often equipped with an ECM blower motor which will also save on your electricity costs.
Modulating Furnaces
Modulating gas furnaces are at the top end of the gas furnace spectrum and are considered to be the most energy-efficient of the three. But, at an added price over two-stage or single-stage furnaces. Heating from a modulating furnace ramps up in increments to maintain a consistent temperature and the ductwork is always warmed up so there is a little efficiency lost during the warming up process.
When buying a modulating furnace you will almost always need to invest in a new thermostat controller specifically designed for this type of furnace in order to get the most out of it. Always ask your salesman about this option, as it is often not mentioned (due to the added cost of the new thermostat). If you are planning to stay in your home for the long-term, a modulating gas furnace may be the right fit for you.
When you want to buy a new furnace, you should always consult your local HVAC experts before making a decision. A trained HVAC technician can come to your home, go over your situation with you and help you decide which furnace best suits your home.
When you are ready for a new furnace, contact the Twintech experts! Our technicians are experienced and knowledgeable in all types of furnaces and HVAC systems.
For more information about our services, visit our website or give us a call at 1-844-894-6832. Contact Twintech today!
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See What Our Customers Are Saying:
May 13, 2020
We are very happy with our new furnace. The service was excellent the guys worked 6 hours straight through and there was no mess at all they took the old furnace boxs etc with them they then explained everything to us they were very helpful and pleasant , when we need a new air conditioner we know who to call!
May 12, 2020
The crew from sales to installation was very professional and had great attention to detail
May 11, 2020
We couldnt have been more impressed with Twintech - from our first service call with Mitch who took the time to thoroughly diagnose the issue with our furnace, to Dave who proposed a well thought out solution to meet our needs and finally Greg and team who acted quickly to install given we had no heat.
We did our due diligence by soliciting quotes from alternate providers and were shocked and disappointed by the aggressive and manipulative tactics used.
Twintech was honest in their approach, detailed in their product knowledge, reasonably priced, diligent in their follow-up and valued our business.
Well done Twintech! You made this a positive experience for us and our new furnace works beautifully!
May 10, 2020
We recently purchased an Amana high efficiency furnace and humdifier through Twintech. The work was completed very professionally and the quality of the workmanship was high. There was some additional sheet metal work required to complete the installation, which they were able to complete themselves. Overall I am very pleased with the work and would highly recommend Twintech for a furnace replacement.
May 9, 2020
We were very pleased with every aspect of the work that was done. They were very professional and polite. They arrived when they said they would and job was completed on estimated time
We would highly recommend them to whoever needed a recommendation
We have a very large dog and they were very understanding and respectful of him being around
May 8, 2020
The blower on our furnace stopped working leaving us with a cold house. Dave from TwinTech responded immediately to our HomeStars service request. From beginning to end Dave was nothing but helpful, friendly and professional, he did a great job of walking us through the quote and scope of work.
The replacement of the furnace went smoothly. The Guys did a great job, everyone was very friendly and polite. There were no hiccups, or unexpected costs. The only surprise was they left the work area cleaner than it was before they started.
Was a great experience with the whole TwinTech team. Its been a couple of months since the new furnace has been installed and its working great!
May 7, 2020
I heard about TwinTech when researching new furnaces at furnaceprices.ca. After contacting them about my broken down furnace, Dave came to my house the next day to assess my situation and requirements for a new furnace. He recommended one that had stainless steel heat exchangers which sold me since my previous furnace had issues with a rusted secondary heat exchanger that had to be replaced. Dave also set me up with an appointment with an energy audit company so that I could take advantage of a rebate to help improve the energy efficiency of my home and get some money back. A few days later, Greg, Grant, and Mitch came to install the new furnace and remove the old one. When delivering and removing the furnaces, they were very careful not to damage my floors and walls, and even laid out red carpeting to protect the floors. They were very friendly and professional. The installation was completed in the time they said it would take and they cleaned up their work areas. Within a week, Dave called to follow-up to see how everything was going. I have already recommended them to several friends and family members who may need new furnaces soon.
May 6, 2020
Twintech did a great job, from Dave the Sales Rep to the Office staff and The Professional Technicians who did the installation. They were professional, courteous, knowledgable and informative. From beginning to follow up we were completely satisfied with everything. Thanks Again. Sincerely The Laytons
May 5, 2020
Great product, great service, great follow-up. The Twintech Heating and Cooling arranged removal of my existing oil tank and they installed the new gas furnace Amana (made in USA). I am very happy with the final result and support I received throughout the process. My thanks go to the entire Twintech team for their professionalism, great communication and follow-up.
May 4, 2020
We've had Twintech provide us with work in the past, for an inground pool heater and required rough-in for a new gas stove. More recently they provided the same friendly, professional, timely and clean installation of our new furnace.
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