Variable Speed Furnaces

Variable Speed Furnaces in BC

Variable speed furnaces represent the pinnacle of modern heating technology, offering unparalleled efficiency, comfort, and control for homeowners in British Columbia (BC). Unlike single-stage and two-stage furnaces, variable speed furnaces can adjust their heating output and blower motor speed to precisely match your home’s heating needs. This advanced functionality leads to significant energy savings, enhanced indoor air quality, and superior temperature consistency.

What is a Variable Speed Furnace?

A variable speed furnace uses a special blower motor that can operate at a wide range of speeds, as opposed to running at a single speed or two speeds. This allows the furnace to ramp up or down its output incrementally, providing just the right amount of heat needed to maintain a steady indoor temperature. The furnace continuously adjusts its performance to match the specific demands of your home, resulting in optimal comfort and efficiency.

Benefits of Variable Speed Furnaces

  • Superior Comfort: Variable speed furnaces provide consistent and even heating throughout your home, eliminating hot and cold spots.
  • Energy Efficiency: By adjusting its speed to run at lower levels for longer periods, a variable speed furnace uses less energy and reduces utility bills.
  • Enhanced Air Quality: The continuous airflow improves air filtration and humidity control, contributing to better indoor air quality.
  • Quiet Operation: Variable speed furnaces operate more quietly than single-stage or two-stage models, as the blower motor runs at lower speeds most of the time.
  • Improved Durability: The gradual start-up and shut-down reduce wear and tear on the furnace components, extending its lifespan.

Drawbacks of Variable Speed Furnaces

  • Higher Initial Cost: Variable speed furnaces typically have a higher upfront cost compared to single-stage and two-stage models.
  • Complexity: With advanced technology and more components, variable speed furnaces may require more sophisticated maintenance and repairs.

ROMA Heating & Cooling Services for Variable Speed Furnaces

At ROMA Heating & Cooling, we provide comprehensive services for variable speed furnaces, ensuring your system operates at peak performance and efficiency. Our services include installation, maintenance, repair, and expert consultations to help you select the ideal furnace for your home.

Installation Services

Proper installation is crucial for the optimal performance of a variable speed furnace. Our installation services include:

  • Home Assessment: A thorough evaluation of your home’s heating needs, including size, layout, insulation, and climate considerations.
  • Professional Installation: Our experienced technicians handle all aspects of the installation process, from removing your old furnace to setting up and testing the new system.
  • System Optimization: Post-installation testing and adjustments to ensure your furnace operates at maximum efficiency.

Maintenance Services

Regular maintenance is essential to keep your variable speed furnace running smoothly and efficiently. Our maintenance services include:

  • Annual Inspections: Comprehensive inspections to identify and address potential issues before they escalate.
  • Cleaning Services: Detailed cleaning of furnace components, including filters, burners, and ducts, to maintain optimal performance.
  • Performance Tuning: Adjustments and calibrations to ensure your furnace operates efficiently and effectively.

Repair Services

If your variable speed furnace encounters any issues, our skilled technicians are available 24/7 to provide prompt and reliable repair services. We address a wide range of common problems, including:

  • Heating Issues: Diagnosing and fixing issues that prevent the furnace from heating properly.
  • Noise Problems: Identifying and resolving unusual sounds coming from the furnace.
  • System Failures: Addressing complete system breakdowns to restore your home’s heating.

Consultations for Choosing the Right Furnace

Selecting the right variable speed furnace involves careful consideration of various factors. Our expert consultations help you make an informed decision by assessing:

  • Home Size and Layout: Calculating the appropriate furnace size based on the square footage and design of your home.
  • Insulation Quality: Evaluating your home’s insulation to recommend the most efficient furnace options.
  • Budget Considerations: Balancing the initial cost with long-term savings and energy efficiency to find the best value.

Calculations for Different Homes

Choosing the correct variable speed furnace requires precise calculations to ensure optimal heating performance. Here’s how we approach the process:

Step 1: Assess Heating Load

The heating load calculation determines the amount of heat needed to maintain a comfortable indoor temperature. This involves:

  • Square Footage: Measuring the total area of your home that requires heating.
  • Insulation Levels: Considering the quality and amount of insulation in walls, floors, and ceilings.
  • Windows and Doors: Evaluating the number, size, and type of windows and doors, as they impact heat loss.
  • Climate Conditions: Factoring in the typical outdoor temperatures and weather patterns in your area.

Step 2: Calculate BTU Requirements

Based on the heating load, we calculate the British Thermal Unit (BTU) requirements for your home. BTUs measure the heat output of the furnace per hour. The formula used is:

𝐵𝑇𝑈=Square Footage×BTU per Square Foot

The BTU per square foot varies depending on insulation and climate. For example:

  • Moderate Climate with Good Insulation: 30-35 BTU per square foot
  • Colder Climate or Poor Insulation: 40-45 BTU per square foot

Step 3: Select the Appropriate Furnace Size

Using the BTU requirements, we recommend a furnace size that matches your home’s heating needs. It’s essential to choose a furnace with the right capacity to avoid:

  • Oversizing: Leads to short cycling, increased wear and tear, and higher energy costs.
  • Undersizing: Results in inadequate heating, discomfort, and higher operational costs.

Example Calculations

Here are three examples illustrating the furnace size calculations for different homes:

Example 1: Small Home in Victoria

  • Home Size: 1,200 square feet
  • Insulation: Good
  • Climate: Moderate

Recommended Furnace Size: 36,000 BTU

Example 2: Medium-Sized Home in Kelowna

  • Home Size: 2,000 square feet
  • Insulation: Average
  • Climate: Moderate

Recommended Furnace Size: 70,000 BTU

Example 3: Large Home in Prince George

  • Home Size: 3,500 square feet
  • Insulation: Excellent
  • Climate: Cold

Recommended Furnace Size: 140,000 BTU

Customer Scenarios

Scenario 1: Upgrading to a More Efficient System

Customer: The Roberts Family in Burnaby

Issue: The Roberts family had an old two-stage furnace that was inefficient and led to high energy bills and uneven heating.

Solution: Our team evaluated their 2,500 square foot home and recommended a variable speed furnace with a 90,000 BTU capacity. This upgrade promised better efficiency and consistent heating.

Outcome: The new furnace provided improved comfort with even heat distribution and reduced energy bills by 30%. The Roberts family appreciated the quieter operation and enhanced air quality.

Scenario 2: New Home Construction

Customer: The Li Family in Richmond

Issue: The Li family was building a new home and wanted a heating system that balanced efficiency and comfort for their 3,000 square foot residence.

Solution: We collaborated with their builder to recommend a 100,000 BTU variable speed furnace. We also provided guidance on ductwork design to optimize heating efficiency.

Outcome: The Li family’s new home enjoyed consistent, efficient heating from day one. They were pleased with the seamless installation process and the furnace’s performance.

Scenario 3: Reducing Environmental Impact

Customer: Mr. Nguyen in Coquitlam

Issue: Mr. Nguyen wanted to upgrade his old furnace to a more energy-efficient model to lower his carbon footprint and heating costs.

Solution: We conducted a detailed energy audit and recommended a 65,000 BTU variable speed furnace with a high AFUE rating of 97% for his 1,800 square foot home.

Outcome: The new furnace reduced Mr. Nguyen’s energy consumption and heating bills by 35%, and he was delighted with the improved environmental impact and comfort.

Popular Models and Series

Lennox SLP98V

The Lennox SLP98V is a top-of-the-line variable speed furnace designed to provide maximum efficiency and comfort. Key features include:

  • Efficiency: Up to 98.7% AFUE
  • Variable Speed Operation: Ensures consistent and comfortable heating
  • Quiet Operation: SilentComfort™ technology reduces operational noise

Trane XV80

The Trane XV80 offers excellent efficiency and performance, making it a popular choice among homeowners. Key features include:

  • Efficiency: Up to 80% AFUE
  • Variable Speed Blower: Enhances comfort and efficiency
  • Durable Construction: Heavy-duty steel cabinet ensures long-lasting performance


Variable speed furnaces offer significant benefits in terms of comfort, efficiency, and quiet operation, making them an excellent choice for homeowners in BC. At ROMA Heating & Cooling, we provide expert guidance and comprehensive services to help you select, install, maintain, and repair your variable speed furnace. Contact us today for a free consultation and estimate to find the perfect heating solution for your home.

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