Two Stage Furnace

What Is a Two-Stage Furnace? A Complete Guide for Tempe, AZ HomeownersIf you’re shopping for a new heating system or looking to improve your home’s comfort and efficiency, you’ve likely heard about two-stage furnaces. But what exactly does that mean — and is it worth the investment?
At HVAC Tempe Pros, we help homeowners across Tempe, Chandler, and Gilbert choose the best heating systems for their homes and budgets. In this guide, we’ll explain how two-stage furnaces work, their benefits, and why they’re an ideal option for Arizona homeowners seeking comfort and energy savings.

What Is a Two-Stage Furnace?A two-stage furnace is a type of gas furnace designed to operate at two different heating levels — low and high.
  • Stage 1 (Low Heat): The furnace runs at about 60–70% capacity most of the time, providing gentle, consistent heating.
  • Stage 2 (High Heat): The furnace switches to 100% power when outdoor temperatures drop significantly or when your thermostat demands more heat.
This ability to adjust output makes a two-stage furnace far more efficient and comfortable than a single-stage furnace, which only has one setting — full power or off.

How a Two-Stage Furnace WorksWhen your thermostat calls for heat, the furnace starts in its low stage, warming your home gradually and evenly. If the system senses that the desired temperature isn’t being reached quickly enough, it automatically shifts into the high stage to provide extra warmth.
This approach reduces temperature swings, lowers noise levels, and enhances overall energy efficiency.
In short, a two-stage furnace adapts to your home’s heating needs — instead of blasting hot air in short bursts like older systems.


5 Benefits of a Two-Stage Furnace1. Greater ComfortThe biggest advantage is consistent, even heating. Instead of your furnace blasting hot air and then shutting off, a two-stage model maintains steady temperatures throughout your home. No more cold spots or sudden temperature drops.
2. Energy EfficiencyBecause the furnace spends most of its time operating in low mode, it uses less fuel and electricity. This means lower energy bills — especially during mild Arizona winters when full power isn’t needed.
3. Quieter OperationTwo-stage furnaces run more quietly since they don’t constantly start and stop. The blower motor runs at a lower speed most of the time, keeping operation nearly silent.
4. Improved Air QualityLonger run times on low heat mean your air filter and humidifier (if installed) have more time to clean and balance indoor air. This helps reduce dust and allergens.
5. Longer Equipment LifeWith fewer on/off cycles and less strain on components, a two-stage furnace typically lasts longer and requires fewer repairs over its lifetime.

Is a Two-Stage Furnace Worth It in Tempe, AZ?Absolutely. While Tempe doesn’t experience freezing temperatures like northern states, winter nights can dip into the 40s — and many homes still rely on their furnaces for comfort.
A two-stage furnace is ideal for Arizona because it:
  • Runs efficiently during mild days
  • Provides powerful heating on rare cold nights
  • Offers improved comfort without skyrocketing energy costs
The initial investment may be higher than a single-stage unit, but the energy savings and comfort make it well worth it in the long term.


5 Signs You May Need a Furnace UpgradeIf your current furnace is more than 15 years old, frequently needs repairs, or struggles to keep your home evenly heated, it might be time to upgrade.
Here are some signs it’s time for a new system:
Installing a two-stage furnace can dramatically improve comfort while lowering monthly costs.

Professional Two-Stage Furnace Installation in Tempe, AZAt HVAC Tempe Pros, we’re experts in two-stage furnace installation, replacement, and repair. Our technicians are fully licensed, insured, and trained to work with all major brands — including Trane, Lennox, Carrier, Goodman, and Rheem.
When you choose us, you get:
  • Free in-home estimates
  • Precision installation with proper sizing and ductwork optimization
  • Manufacturer-backed warranties
  • Maintenance plans to protect your investment
We take pride in delivering fast, professional service across Tempe, Chandler, Gilbert, and the greater Phoenix area.

How Much Does a Two-Stage Furnace Cost in Tempe, AZ?The cost of installing a two-stage furnace typically ranges between $3,800 and $6,500, depending on the size of your home, furnace brand, and installation complexity.
At HVAC Tempe Pros, we offer:
  • Transparent pricing
  • Affordable financing options
  • Manufacturer rebates (when available)
We’ll help you find the best value system for your budget and home size.

Call HVAC Tempe Pros Today!If you’re ready to enjoy quieter, more efficient, and more comfortable heating, it’s time to upgrade to a two-stage furnace.
📞 Call (602) 566-9684 today to schedule your free estimate or visit www.hvactempepros.com to learn more.
Our team will help you select the perfect furnace for your home and ensure a flawless installation — backed by friendly local service and satisfaction guaranteed.

Questions on Two Stage FurnaceQ: How long does a two-stage furnace last?
A: Most systems last 15–20 years with proper maintenance. Regular tune-ups help extend the lifespan.
Q: Does a two-stage furnace save money?
A: Yes. Because it runs mostly on low mode, you’ll use less gas and electricity — leading to lower energy bills over time.
Q: Can a two-stage furnace work with any thermostat?
A: You’ll need a compatible two-stage thermostat to take full advantage of both heating stages.
Q: Is a two-stage furnace quieter than a regular furnace?
A: Absolutely. The low-speed operation makes it much quieter than a single-stage model.