LG Electric Furnace LGRED R32 | 4 Tons - 48000 BTU

A Powerful Central Solution for Montreal's Demanding Winters

At AirGreen, we regularly install central systems capable of meeting Quebec's climatic demands, and this 4-ton (48,000 BTU) LG LGRED R32 electric furnace is clearly among the most robust solutions we recommend for residential and multi-unit properties in Montreal, Laval, Longueuil, on the North Shore, and the South Shore.

This model, designed to operate in combination with the LG KUSXA481A central heat pump, offers a smart hybrid approach: an efficient heat pump for most of the season, and a reliable electric furnace to take over during periods of intense cold.

In-Depth Technical Analysis: What This LG Furnace Really Changes

Capacity and Thermal Performance

The nominal capacity of 48,000 BTU (4 tons) effectively covers:

• Medium to large single-family homes
• Duplexes and triplexes
• Small residential buildings
• Light commercial spaces

During our installations in Brossard and Laval, this type of capacity proved particularly suitable for homes between 1,800 and 2,800 sq ft, providing excellent thermal stability.

Key technical points:

• Power at -8 °C: 30,400 BTU
• Power at -15 °C: 46,000 BTU
• Operation down to -25 °C with the associated heat pump

This means that even during critical periods in January and February, the system maintains consistent performance without a drastic drop in efficiency.

Energy Efficiency and Real-World Performance

The data provided indicates:

• SEER2: 19.0
• HSPF2: 9.6
• COP: 3.91

These values are important, but in the field, what really matters is the system's behavior under real conditions.

During a recent installation in Longueuil, we observed:

• A reduction in electricity consumption of nearly 22% compared to an older conventional electric furnace
• Better heat distribution thanks to optimized airflow

Even though the model is not ENERGY STAR certified, its efficiency combined with the heat pump makes it an economically relevant solution.

Airflow and Indoor Comfort

The system offers an airflow of up to 1400 CFM, which allows for:

• Homogeneous heat distribution
• Better humidity management (8.64 pt/h)
• Reduction of cold spots in the house

In several projects carried out in Repentigny and Saint-Hubert, clients immediately noticed an improvement in comfort in rooms far from the central system.

Sound Level and Acoustic Comfort

• Indoor: 37 to 42 dB(A)
• Outdoor: 56 dB(A)

This sound level is considered very discreet for a central system of this power.

In a project in Montreal (Rosemont), the client had strict noise requirements due to a home office: the system proved perfectly suitable.

HVAC Installation: AirGreen Field Expertise

Configuration and Technical Requirements

The installation of this LG electric furnace requires:

• 220V electrical supply
• MCA: 32A
• MOP: 40A
• Refrigerant connections: 3/8 – 5/8

Our teams systematically ensure:

• Verification of the electrical panel capacity
• Adaptation of existing ducts
• Optimization of positioning to reduce losses

Real Installation Example – South Shore (Boucherville)

We recently installed this model in a house built in the 1990s:

Initial situation:

• Old energy-intensive electric furnace
• Uneven air distribution
• Excessive noise

AirGreen Intervention:

• Complete replacement with the LGRED system
• Adjustment of main ducts
• Addition of smart control (optional WiFi)

Result:

• Uniform thermal comfort
• Significant reduction in short cycles
• Noise reduction

Common Mistakes to Avoid

We often encounter the same problems in the field:

• Undersizing of the system
• Poor compatibility with existing ducts
• Installation without optimizing airflow

At AirGreen, we analyze each project in detail to avoid these errors, especially in older Montreal buildings where constraints are frequent.

LG Technology and R-32 Refrigerant: A Strategic Choice

Why R-32 is Relevant

The system uses R-32 refrigerant, recognized for:

• Better energy efficiency
• Reduced environmental impact
• Stable heating performance

In our installations in Laval and Terrebonne, we observed better consistency in performance compared to older R-410A systems.

Compressor and Design

• R1 Scroll compressor
• Dual axial fans
• Brushless digitally controlled motors

These elements ensure:

• Increased durability
• Less mechanical wear
• Better power modulation

Subsidies and Return on Investment

This unit is eligible for a LogisVert grant of $3648 (updated November 2025), significantly reducing the initial cost.

In several projects we have completed:

• The return on investment is between 5 and 8 years
• Energy savings are maximized when used with the heat pump

Why Choose AirGreen for Your LG System Installation

Recognized Local Expertise

At AirGreen, we work daily in:

• Montreal
• Laval
• Longueuil
• North Shore
• South Shore

Our technicians are perfectly familiar with the specific characteristics of Quebec buildings.

Transparent Approach

We systematically apply:

• Clear pricing before installation
• Complete project analysis
• No surprises at the end of the project

Quality of Execution

• Certified refrigeration technicians
• Liability insurance of $5,000,000
• Installation compliant with RBQ standards

Conclusion: A Reliable and Durable Solution for the Quebec Climate

The LG LGRED R32 4-ton electric furnace represents a solid solution for homeowners seeking:

• Stable performance in winter
• Efficient integration with a heat pump
• Constant comfort throughout the house

At AirGreen, we recommend this system for projects requiring reliable power and professional installation adapted to Quebec's realities.

Contact AirGreen for Your HVAC Project

To obtain a personalized quote, schedule an installation, or receive advice tailored to your property in Montreal, Laval, Longueuil, on the North Shore, or the South Shore, contact our team today.

We will analyze your situation and propose a precise, efficient, and durable solution.