How to Choose an Electric Furnace from The Furnace Outlet
Shopping for a new furnace can feel like trying to pick the perfect winter coat — too small, and you’ll freeze; too big, and you’ll waste money and energy.
That’s why choosing the right electric furnace from The Furnace Outlet isn’t just about price — it’s about fit, comfort, and long-term value.
Whether you’re replacing an aging system or upgrading to a high-efficiency model, this guide will help you confidently filter through specs like kW capacity, airflow, warranty, and features — all in plain English.
Let’s walk through what matters most, and how to match the right model to your home, your lifestyle, and your budget — without the guesswork.
1. Step One: Know Your Home’s Heating Load (and Why It Matters)
Before looking at models, you need to know how much heat your home actually needs — measured in kilowatts (kW).
Every 1 kW of power produces about 3,400 BTUs of heat. So, for example, a 15 kW furnace produces roughly 51,000 BTUs per hour.
Quick Sizing Guide
| Home Size (sq. ft.) | Recommended Furnace Power (kW) | Approx. BTU Output |
|---|---|---|
| Up to 1,000 | 10–12 kW | 34,000–41,000 BTUs |
| 1,000–1,600 | 12–15 kW | 41,000–51,000 BTUs |
| 1,600–2,200 | 15–20 kW | 51,000–68,000 BTUs |
| 2,200–3,000 | 20–25 kW | 68,000–85,000 BTUs |
| 3,000+ | 25–30+ kW | 85,000+ BTUs |
Pro Tip: Always confirm your home’s size, insulation, and ceiling height with a load calculation (Manual J). The Furnace Outlet team can help match you to the right kW if you’re unsure.
According to the U.S. Department of Energy, correct sizing can save homeowners up to 20% on heating energy over the system’s life (Energy.gov).
2. Step Two: Understand Airflow and Static Pressure
The power of your furnace means nothing if the airflow isn’t right.
Airflow, measured in CFM (cubic feet per minute), determines how efficiently heat moves through your ducts and rooms.
Airflow Guidelines
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Standard homes: 400–450 CFM per ton of cooling or equivalent airflow in heating.
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Larger homes with long ducts: Aim higher (450–500 CFM).
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Smaller or well-insulated homes: Slightly lower airflow (350–400 CFM) works fine.
If your ducts are older or narrow, choose a furnace model with multi-speed or variable-speed blowers — these adjust airflow automatically for comfort and quieter operation.
A 2023 report found that variable-speed ECM blower motors improve heating uniformity by up to 30% and cut fan energy by nearly 60% (Energy.gov).
Pro Tip: Variable-speed models aren’t just quieter — they’re better for homes with uneven ducting or multiple floors.
3. Step Three: Compare Key Features That Fit Your Lifestyle
The best furnace isn’t just efficient — it’s easy to live with.
Here’s a breakdown of features to consider across The Furnace Outlet’s electric furnace collection.
| Feature | Why It Matters | Ideal For |
|---|---|---|
| ECM Blower Motor | Adjusts airflow for comfort & efficiency | Multi-level homes or uneven ducting |
| Sequencer Control | Staggers heating elements to prevent surges | Homes with stable power supply |
| Smart Thermostat Compatibility | Enables scheduling, remote control | Tech-savvy homeowners |
| Multi-Stage Heating | Offers low/high operation for smoother heat | Homes in variable climates |
| Cabinet Insulation | Reduces noise and heat loss | Open utility rooms or closets |
| Compact Design | Saves space in apartments or attics | Small homes or condos |
Pro Tip: Pairing your furnace with a smart thermostat like Ecobee or Google Nest can save up to 10% on annual energy use, according to Energy Star (Energy Star).
4. Step Four: Compare Warranties Before You Buy
A warranty is more than paperwork — it’s peace of mind.
The Furnace Outlet offers models from top brands like Goodman, King Electric, and Rheem, all with strong protection terms.
Typical Warranty Ranges
| Component | Warranty Length | Covers |
|---|---|---|
| Parts | 10 years (typical) | Heating elements, sequencers, relays |
| Blower Motor | 5–10 years | Factory defects or motor failure |
| Heat Exchanger | Lifetime (select models) | Manufacturer defect or corrosion |
| Labor | 1–2 years (optional) | Installation workmanship |
Pro Tip: Always register your furnace within 60 days of installation to qualify for full manufacturer coverage. Most extended warranties require proof of professional installation.
5. Step Five: Think About Efficiency Beyond SEER
While SEER2 ratings apply to cooling systems, furnace efficiency is still a huge deal — it determines how much power turns into usable heat.
How Electric Efficiency Works
Electric furnaces operate at nearly 100% efficiency, since all electrical energy converts directly into heat. But you’ll still save more with:
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Proper duct sealing
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Smart thermostats
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Multi-stage heating
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Regular maintenance
A Building and Environment study found that duct leaks can reduce system efficiency by up to 18%, even in all-electric systems (ScienceDirect).
Pro Tip: Don’t just look for efficiency numbers — look for design features that help maintain them, like insulated cabinets and precision sequencers.
6. Step Six: Match Installation Location to Furnace Design
Not every furnace fits every space. Here’s how to choose based on where your furnace will live.
| Installation Area | Recommended Model Type |
|---|---|
| Basement or Utility Room | Standard vertical unit |
| Attic or Crawl Space | Horizontal or multi-position model |
| Closet or Condo | Compact, low-clearance unit |
| Garage or Outbuilding | Heavy-duty cabinet, corrosion-resistant finish |
Pro Tip: Leave at least 24 inches of clearance on the front panel for easy service access. It’ll make future maintenance smoother.
7. Step Seven: Compare Noise Levels and Airflow Comfort
Electric furnaces are naturally quieter than gas units — no burners or combustion chambers. Still, blower speed and cabinet insulation affect sound levels.
| Blower Type | Sound Level | Comfort Rating |
|---|---|---|
| Single-speed | Moderate (audible rush of air) | Basic |
| Two-speed | Quiet (gradual airflow changes) | Good |
| Variable-speed (ECM) | Whisper-quiet | Excellent |
If your furnace will be installed near a bedroom, home office, or living area, choose a two-stage or variable-speed blower for near-silent operation.
8. Step Eight: Use The Furnace Outlet’s Filters to Narrow Choices
On The Furnace Outlet’s site, you can easily narrow your search by using the sidebar filters.
Here’s how to get the most from them:
🧭 Filter by kW Rating
Choose your size based on your home’s square footage (see Section 1).
Options range from compact 10 kW models to large 30 kW+ units.
🌬️ Filter by Airflow Type
Select between Upflow, Downflow, or Horizontal orientation to match your ductwork layout.
🔋 Filter by Voltage
Most models are 240V, but always confirm compatibility with your home’s electrical system.
🧰 Filter by Features
Look for “variable speed,” “multi-stage,” or “smart thermostat ready” tags for modern efficiency perks.
🛡️ Filter by Warranty
Select “10-year parts” or “Lifetime heat exchanger” models if you’re planning a long-term investment.
Pro Tip: Use the comparison tool on The Furnace Outlet to view two or three models side-by-side. You’ll quickly see which one fits your budget and features checklist best.
9. Step Nine: Consider Installation and Compatibility
Before you click “Add to Cart,” confirm your new system matches your existing setup:
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Duct size and layout
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Electrical capacity (amp rating)
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Thermostat type
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Breaker size (60–150 amps typical)
A 2023 Energy and Buildings report emphasized that proper installation and wiring can improve electric heating performance by 15–20% compared to retrofit installs without panel upgrades (ScienceDirect).
If you’re unsure, The Furnace Outlet can connect you with a licensed contractor familiar with these systems.
10. Step Ten: Think Long-Term — Total Cost of Ownership
Price tags tell only part of the story. Consider total ownership costs, including:
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Electricity consumption
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Maintenance needs
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Filter replacements
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Warranty protection
Comparison Example
| Model Type | Upfront Cost | Annual Operating Cost | Lifespan | Notes |
|---|---|---|---|---|
| Basic single-speed | $1,800 | $1,200 | 20 yrs | Reliable, fewer features |
| Two-stage ECM | $2,400 | $1,000 | 25 yrs | Quieter, more efficient |
| Modulating variable-speed | $3,000 | $900 | 30 yrs | Ultimate comfort, smart-ready |
Over time, the premium for a higher-end model often pays for itself in energy savings and comfort.
Pro Tip: If you plan to stay in your home 10+ years, choose the model that feels best — not just the one that costs least.
11. Ready-to-Install Packages vs. Custom Builds
The Furnace Outlet offers both:
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Pre-packaged units (ideal for standard homes)
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Custom kits (for multi-zone or non-traditional layouts)
If you’re replacing an older system, a ready-to-install package may fit perfectly with minimal duct or electrical modifications. For remodels or additions, a custom configuration ensures your airflow and load balance stay perfect.
12. Samantha’s Step-by-Step Buying Checklist
Before you buy, walk through this quick checklist:
✅ Calculate your home’s heating load (size + insulation)
✅ Check your electrical panel’s amp rating
✅ Confirm airflow direction (upflow, downflow, horizontal)
✅ Decide which blower type fits your comfort preference
✅ Review warranty and registration requirements
✅ Choose a smart thermostat for efficiency
✅ Save your receipt and model info for future service
Pro Tip: Take photos of your existing furnace setup before shopping — they’ll help The Furnace Outlet’s team recommend the best match instantly.
13. When in Doubt, Ask an Expert
Even if you love DIY, furnace selection benefits from a second set of eyes. The Furnace Outlet’s experts can:
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Confirm model compatibility
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Suggest accessories (disconnect boxes, filters, thermostats)
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Recommend installers in your region
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Help you compare performance specs line-by-line
“Choosing a furnace isn’t just about heat — it’s about peace of mind for the next 20 winters.”
14. Samantha’s Takeaway
Buying an electric furnace doesn’t have to feel complicated. When you focus on the essentials — size, airflow, features, and warranty — the perfect model often reveals itself.
“Comfort isn’t about spending more — it’s about buying smarter. And that starts with knowing exactly what your home needs.”
Whether you’re shopping for efficiency, longevity, or quiet performance, The Furnace Outlet’s collection is designed to make heating feel easy — and your home, perfectly comfortable.
15. Ready to Find Your Match?
Explore The Furnace Outlet’s Electric Furnace Collection to filter by size, airflow, and performance features that suit your home.
From compact, condo-friendly units to high-capacity models with whisper-quiet ECM motors, every option is backed by strong warranties and trusted brands — making it easier to decide whether to repair or replace your furnace.
Because choosing comfort should be simple — and at The Furnace Outlet, it is.
