Best Electric Furnaces for Homes

Best Electric Furnaces: Quick Picks

The “best” electric furnace depends on the home’s heating load, electrical
service, duct system, climate, and whether the furnace will be used as the
primary heating system or as backup heat for a heat pump.

Unlike gas furnaces, electric furnaces generally do not have an AFUE rating
in the same way combustion furnaces do. Electric resistance heating converts
essentially all of the electricity entering the heating elements into heat
at the point of use, although the overall cost and environmental impact
depend on electricity prices and how the electricity is generated.

What Is an Electric Furnace?

An electric furnace is a forced-air heating system that uses electrical
resistance heating elements to heat air.

The system normally consists of:

• Electric heating elements
• Blower motor
• Air handler or furnace cabinet
• Control board
• Thermostat connection
• Limit and safety controls
• Air filter
• Supply and return duct connections

When the thermostat calls for heat, electrical current passes through
resistance elements. The elements become hot, and the blower moves air
across them before distributing the heated air throughout the house.

How Do Electric Furnaces Work?

Electric furnaces use the same basic principle as many electric space
heaters: electrical resistance produces heat.

1. The thermostat detects that the indoor temperature is below the setpoint.
2. The control system activates one or more heating elements.
3. The blower starts moving air through the furnace.
4. Air absorbs heat from the electrical elements.
5. The heated air travels through the supply ducts.
6. The thermostat eventually reaches the desired temperature.
7. The heating elements and blower reduce or shut off according to the control sequence.

Larger electric furnaces can contain multiple heating elements that can be
energized in stages rather than switching the entire heating capacity on at
once.

Electric Furnace vs Electric Heat Pump

One of the most important distinctions for homeowners is the difference
between an electric resistance furnace and an electric heat pump.

An electric furnace creates heat directly using resistance elements. A heat
pump moves heat from outside to inside using a refrigeration cycle.

Best Types of Electric Furnaces

1. Multi-Stage Electric Furnaces

Multi-stage systems can activate heating elements in stages instead of
delivering maximum heat every time there is a call for heat.

This can improve comfort and reduce unnecessary full-capacity operation
during mild heating demand.

2. Variable-Speed Electric Furnaces

Variable-speed blower technology allows the blower to adjust airflow more
precisely than a basic single-speed motor.

Benefits can include quieter operation, better temperature distribution, and
improved control of airflow.

3. Electric Furnaces With Heat Pumps

Many modern systems combine a heat pump with electric resistance heat
strips. The heat pump handles normal heating demand while resistance
elements provide supplemental or emergency heat when necessary.

This configuration is often more economical than using resistance heating
alone because the heat pump can move substantially more heat per unit of
electricity under appropriate operating conditions.

4. Electric Air Handlers With Heat Kits

Many systems marketed as electric heating systems are actually air handlers
with optional electric heat kits.

This configuration is common in heat-pump installations. The air handler
provides the blower and distribution system, while the heat kit supplies
resistance heat when required.

5. Compact Electric Furnaces

Compact models can be useful where mechanical-room or closet space is
limited.

Cabinet dimensions, service clearances, airflow, and electrical requirements
must still be verified before installation.

How to Choose the Best Electric Furnace

Choosing an electric furnace should begin with the heating requirement of the
house rather than the furnace’s maximum BTU rating.

1. Determine the Heating Load

The most important step is determining how much heat the house actually
loses during design conditions.

A professional HVAC contractor can perform a residential heating-load
calculation, commonly using Manual J methodology.

2. Choose the Appropriate Capacity

Electric furnaces are commonly specified by heating capacity, often in kW,
rather than only by BTU/h.

These are approximate conversions based on 1 kW equaling approximately
3,412 BTU/h.

3. Check the Electrical Service

This is critical with electric furnaces.

A large electric furnace can require substantial electrical current.
Installation may require dedicated circuits, appropriate breakers,
conductors, disconnects, and sufficient electrical service capacity.

Before purchasing a high-capacity electric furnace, have an electrician or
qualified HVAC professional determine whether the home’s electrical system
can support the equipment.

4. Check Blower Capacity

The blower must be capable of delivering the required airflow through the
home’s ductwork.

A powerful heating element does not compensate for inadequate airflow.

5. Consider Staged Heat

Staged heat can allow the system to use lower heating capacity when demand
is moderate.

6. Consider the Blower Motor

Variable-speed electronically commutated motors can provide more precise
airflow control than basic single-speed motors.

7. Check Thermostat Compatibility

Make sure the thermostat can properly control the selected furnace or air
handler and any available heat stages.

How to Size an Electric Furnace

Electric furnace sizing should be based on the home’s heating load rather
than simply selecting the largest available heating kit.

Factors include:

• Home size
• Climate
• Outdoor design temperature
• Insulation
• Windows
• Doors
• Air leakage
• Ceiling height
• Floor construction
• Number of conditioned rooms
• Ductwork

A heating-load calculation is much more reliable than a simple
watts-per-square-foot rule.

Approximate Electric Furnace Capacity Guide

These figures should not be interpreted as recommended furnace sizes for
specific square-footage ranges. The actual requirement depends on the
building’s heat loss.

How Efficient Are Electric Furnaces?

Electric resistance heating is highly efficient at converting electricity
into heat at the point of use. Unlike combustion furnaces, there is no
combustion exhaust carrying heat away through a flue.

However, homeowners should distinguish between conversion
efficiency and operating cost.

Electric resistance heat can be expensive to operate in areas where
electricity prices are high because every unit of heat requires electrical
energy.

A heat pump can often deliver more heating energy than the electrical energy
it consumes because it transfers heat rather than generating all of the heat
through resistance.

Why Electric Furnaces Do Not Usually Use AFUE

AFUE is primarily used to describe the seasonal efficiency of combustion
furnaces.

Electric resistance furnaces do not have combustion losses in the same way,
so they are generally evaluated differently.

When comparing electric heating systems, look at:

• Electrical input
• Heating capacity
• Blower efficiency
• Heat-pump COP or performance data when applicable
• Local electricity rates
• Operating hours
• System controls

How Much Does It Cost to Run an Electric Furnace?

Operating cost depends primarily on the furnace’s electrical input, runtime,
and local electricity price.

A simple calculation is:

Cost per hour = Furnace electrical input in kW × electricity price per kWh

For example, a 15 kW heating system operating at full output would consume
approximately 15 kWh of electricity in one hour.

At an electricity price of $0.18/kWh:

15 × $0.18 = $2.70 per hour

This is a simplified example. Actual systems can stage heating elements,
cycle on and off, and operate at different loads, so actual daily and
monthly costs can be considerably different.

Electric Furnace Operating Cost by Heat Size

Example only. Electricity rates vary significantly throughout the United
States, and the furnace will not necessarily operate at full output for
every hour.

Are Electric Furnaces Expensive to Run?

They can be, depending on local electricity prices and heating demand.

Electric resistance heating is often attractive where electricity is
inexpensive, natural gas is unavailable, or installation simplicity is a
priority.

In other locations, a heat pump may provide substantially lower heating
energy consumption than electric resistance heat.

Homeowners should compare local electricity prices with natural gas and
consider the entire system rather than choosing solely based on equipment
purchase price.

Electric Furnace Installation Requirements

Electric furnaces are simpler than combustion furnaces in some respects, but
their electrical requirements can be substantial.

A professional installation may involve:

• Dedicated electrical circuits
• Appropriately sized breakers
• Correct wire size
• Disconnect equipment
• Proper grounding
• Correct airflow
• Duct connections
• Thermostat wiring
• Control configuration
• Heat-strip configuration

Electrical work should comply with applicable local codes and be performed
by appropriately qualified professionals.

Does an Electric Furnace Need a Gas Line?

No.

An electric furnace does not burn natural gas or propane, so it does not
require a gas supply line.

This can simplify installation in homes where gas service is unavailable.

Does an Electric Furnace Need a Chimney or Flue?

No combustion flue is required because an electric furnace does not produce
combustion gases.

This can make electric heating attractive for certain replacement
installations where removing combustion equipment is desirable.

Does an Electric Furnace Need a 200-Amp Electrical Service?

Not every electric furnace requires a 200-amp service, but larger electric
heating systems can place significant demands on the home’s electrical
system.

The appropriate service size depends on the entire home’s electrical load,
not just the furnace.

A qualified electrician should evaluate the service before installing a
large electric heating system.

Electric Furnace and Ductwork

An electric furnace normally uses the home’s forced-air duct system.

Proper duct sizing matters because insufficient airflow can reduce comfort
and potentially cause the furnace’s safety controls to shut down heating
elements.

Before replacing an existing furnace, inspect:

• Supply duct size
• Return duct capacity
• Filter resistance
• Supply registers
• Return grilles
• Duct leakage
• Blower performance

Popular Electric Furnace and Air-Handler Brands in the U.S.

Several major HVAC manufacturers offer electric furnaces, air handlers,
electric heat kits, or heat-pump systems with resistance backup.

• Carrier
• Trane
• American Standard
• Lennox
• Rheem
• Ruud
• Goodman
• Amana
• Daikin
• York
• Coleman
• Armstrong Air
• Heil
• Tempstar
• Comfortmaker

Brand alone should not determine the purchase decision. Installation
quality, equipment sizing, parts availability, warranty support, contractor
experience, and system compatibility are often just as important.

What Makes One Electric Furnace Better Than Another?

When comparing electric furnaces, consider the following:

Pros and Cons of Electric Furnaces

Advantages

• No natural gas or propane required
• No combustion gases
• No combustion flue required
• Generally simple heating technology
• Can work with existing forced-air ductwork
• Can be integrated with heat pumps
• Multiple heating stages are available
• Can be installed where gas service is unavailable
• No gas combustion maintenance

Disadvantages

• Electricity can be expensive in some regions
• Large systems can require substantial electrical capacity
• Resistance heat generally consumes more electricity than a heat pump for the same heating output
• Heat-strip operation can become expensive during extended cold weather
• Electrical upgrades may be necessary in some homes
• Not every existing duct system can support a large heating system

Electric Furnace vs Heat Pump

For many homeowners, the more important question is not which electric
furnace to buy but whether an electric resistance furnace is the best
heating technology for the home.

In many modern installations, a heat pump with appropriately sized electric
backup heat can be more attractive than using resistance heat as the
primary heating source.

Best Electric Furnace for a Heat Pump

If the electric furnace will primarily serve as backup heat for a heat pump,
look for an air handler or furnace designed specifically for heat-pump
integration.

Important features include:

• Compatible heat-pump controls
• Appropriately sized heat strips
• Multiple heat stages
• Compatible thermostat
• Correct blower capacity
• Emergency-heat capability
• Outdoor-temperature control compatibility where applicable

Oversized resistance heat kits can be particularly costly to operate, so
sizing should be based on the actual heat-pump design and the home’s
heating-load requirements.

Best Electric Furnace for Cold Climates

Electric furnaces can provide reliable heat in cold climates because
resistance elements do not depend on extracting heat from outdoor air.

However, the electrical demand of a large resistance heating system can be
substantial.

In cold climates, homeowners should compare:

• Local electricity rates
• Heating degree days
• Home insulation
• Heat-pump performance at low temperatures
• Backup heat requirements
• Electrical service capacity

A cold-climate heat pump with appropriately sized electric backup may offer
a better overall solution than resistance heating alone.

Best Electric Furnace for Older Homes

Older homes require special attention to heat loss and electrical capacity.

Before selecting a replacement system, check:

• Existing electrical service
• Panel capacity
• Existing ductwork
• Insulation
• Windows
• Air leakage
• Existing furnace dimensions
• Return-air capacity

If the home has poor insulation, simply installing a larger electric furnace
may not be the best solution. Improving the building envelope can reduce
heating demand.

Best Electric Furnace for a Small Home

Small homes generally require less heating capacity, but proper sizing is
still necessary.

A compact electric furnace or appropriately sized air handler can be useful
where space is limited.

Do not select a large unit simply because it is more powerful. Excessive
capacity can result in inefficient system operation and unnecessary
electrical demand.

How Long Do Electric Furnaces Last?

Electric furnaces can have long service lives because they do not contain a
combustion heat exchanger or gas burner assembly.

Actual lifespan depends on:

• Installation quality
• Operating hours
• Airflow
• Filter maintenance
• Electrical conditions
• Component quality
• Climate
• Maintenance

Blower motors, control boards, relays, heating elements, limit controls, and
other components can eventually require replacement.

Electric Furnace Maintenance

Electric furnaces generally require less combustion-related maintenance than
gas furnaces, but they are not maintenance-free.

Replace or Clean the Filter

A restricted filter can reduce airflow and make the system work harder.
Follow the filter manufacturer’s replacement recommendations and check it
more frequently in dusty environments.

Keep Registers Open

Avoid unnecessarily blocking supply registers or return grilles.

Inspect the Blower

Dust accumulation on blower components can affect airflow.

Check Electrical Components

Qualified technicians should periodically inspect electrical connections,
heating elements, controls, and safety components.

Maintain Ductwork

Leaky or poorly insulated ducts can reduce the amount of heat that reaches
living spaces.

Common Electric Furnace Buying Mistakes

Buying Based Only on Price

The cheapest furnace may not have the best controls, blower, warranty, or
contractor support.

Ignoring Electrical Capacity

A large heat kit can place significant demand on the electrical service.

Using Square Footage Alone

Square footage does not determine the home’s exact heating load.

Choosing the Largest Heat Kit

More heating capacity is not automatically better.

Ignoring the Duct System

The furnace and ductwork must be designed to work together.

Ignoring Heat-Pump Integration

If the system will be used with a heat pump, controls and heat-strip staging
should be considered before purchasing.

Ignoring Electricity Rates

Equipment cost is only part of the ownership cost. Local electricity prices
can have a major effect on long-term operating expenses.

Are Electric Furnaces Safe?

Electric furnaces do not produce carbon monoxide through combustion because
they do not burn natural gas or propane.

Nevertheless, they contain high-voltage electrical components and high-
temperature heating elements.

Installation and repairs should therefore be performed by appropriately
qualified professionals.

Never bypass furnace limit switches, thermal safeties, circuit protection,
or other safety devices.

Electric Furnace vs Gas Furnace

Who Should Buy an Electric Furnace?

An electric furnace can make sense for homeowners who:

• Do not have natural gas service
• Already have electric forced-air heating
• Want to eliminate combustion equipment
• Have suitable electrical service
• Have relatively favorable electricity rates
• Need resistance backup for a heat pump
• Want a relatively straightforward forced-air heating system

Who Should Consider a Heat Pump Instead?

A heat pump may be worth considering when reducing electricity consumption
for heating is a priority.

It can be particularly attractive when one system is needed for both heating
and cooling.

Homeowners in colder regions should evaluate equipment specifically designed
for cold-climate operation and determine how much backup resistance heat will
be required.

How Much Does an Electric Furnace Cost?

Electric furnace project costs vary substantially because the equipment is
only one part of the installation.

Total project cost can depend on:

• Furnace or air-handler size
• Heat-kit capacity
• Blower type
• Cabinet configuration
• Electrical upgrades
• Duct modifications
• Thermostat
• Labor
• Permits
• Local market conditions

If an electrical panel or service upgrade is necessary, the total project
price can increase significantly.

Is an Electric Furnace Worth It?

An electric furnace can be a practical heating solution, particularly where
natural gas is unavailable or where a simple non-combustion heating system is
desired.

However, homeowners should compare it against heat pumps before making a
final decision. Resistance heating can consume considerably more electricity
than a heat pump under many operating conditions.

The best system depends on the local climate, electricity price, home
efficiency, existing HVAC infrastructure, and homeowner priorities.

Our Electric Furnace Buying Checklist

1. Get a professional heating-load calculation.
2. Determine the required heating capacity.
3. Check the home’s electrical service.
4. Inspect existing ductwork.
5. Compare blower motor types.
6. Consider staged heating.
7. Consider variable-speed airflow.
8. Check thermostat compatibility.
9. Consider heat-pump integration.
10. Compare warranty coverage.
11. Check local contractor support.
12. Compare estimated operating costs.
13. Get multiple installation quotes.

Frequently Asked Questions About Electric Furnaces

What is the best electric furnace for a home?

The best electric furnace is one that is properly sized for the home’s
heating load, compatible with the ductwork and electrical service, and
installed by a qualified contractor. Features such as staged heating and
variable-speed airflow can improve comfort.

Are electric furnaces 100% efficient?

Electric resistance elements convert essentially all of the electrical
energy used at the element into heat. However, that does not mean an
electric furnace will always have the lowest operating cost. Electricity
prices and alternative technologies such as heat pumps must also be
considered.

Is an electric furnace cheaper than a gas furnace?

Equipment and installation costs vary. Operating cost depends heavily on
local electricity and gas prices, heating demand, and system efficiency.

Does an electric furnace need a chimney?

No. Because an electric furnace does not burn fuel, it does not require a
combustion flue.

Does an electric furnace need a gas line?

No. Electric furnaces use electricity rather than natural gas or propane.

Can an electric furnace heat an entire house?

Yes. A properly sized central electric furnace can provide whole-home heat
through a duct system.

Can an electric furnace work with central air conditioning?

Yes. Electric furnaces or electric air handlers can be integrated with
central air-conditioning systems.

Can an electric furnace work with a heat pump?

Yes. Electric resistance heat is commonly used as supplemental or emergency
heat in heat-pump systems.

What size electric furnace do I need for a 2,000-square-foot house?

There is no reliable universal size based solely on 2,000 square feet. The
required capacity depends on climate, insulation, windows, air leakage,
ceiling height, and other factors. A heating-load calculation should be
used.

Are electric furnaces good for cold climates?

They can provide reliable resistance heat in cold climates, but operating
costs can be high where electricity is expensive. A cold-climate heat pump
with appropriately sized backup heat may provide a more economical solution
in many homes.

How long does an electric furnace last?

Lifespan varies by equipment quality, installation, operating hours,
maintenance, airflow, and other conditions. Individual components may fail
before the entire system reaches the end of its useful service life.

Do electric furnaces require maintenance?

Yes. Filters, blower components, electrical connections, heating elements,
controls, and airflow should be maintained and inspected as appropriate.

What is a heat kit?

A heat kit is a set of electric resistance heating elements installed in an
air handler or compatible HVAC equipment. Heat kits are commonly used to
provide supplemental or emergency heat for heat pumps.

What is the difference between an electric furnace and an air handler?

The terms can overlap in residential HVAC, but an air handler generally
refers to equipment that circulates and conditions air and can accept
electric heat kits. An electric furnace is commonly used to describe
forced-air equipment containing electric heating elements.

Should I choose a variable-speed electric furnace?

Variable-speed blower technology can provide better airflow control, quieter
operation, and improved comfort. Whether the additional cost is worthwhile
depends on the system design and homeowner priorities.

Can an electric furnace reduce carbon monoxide risk?

Electric furnaces do not produce carbon monoxide through combustion because
they do not burn fuel. However, homes should still have properly installed
carbon-monoxide alarms when other combustion appliances or attached garages
are present.

Final Verdict

The best electric furnace for a U.S. home is not necessarily the model with
the highest heating capacity or the lowest equipment price. The most
important factor is matching the system to the home’s actual heating
requirements.

Look for appropriately sized equipment, adequate electrical capacity,
compatible ductwork, reliable controls, and good blower performance.
Multi-stage heating and variable-speed airflow can be valuable upgrades when
comfort and system control are priorities.

For many homeowners, however, the bigger decision is whether to use electric
resistance heating at all. If electricity is the primary energy source,
compare an electric furnace with a modern heat pump before purchasing. A
heat pump can often provide heating at substantially lower electrical
consumption than resistance heating while also providing air conditioning.

Ultimately, the right choice depends on your climate, electricity rates,
home insulation, heating load, existing HVAC equipment, electrical service,
and budget.