How Much Does It Really Cost to Run a Central Heat Pump for One Hour?

At AirGreen, we know that one question keeps coming up for homeowners and property managers across Greater Montréal, the North Shore, and the South Shore: how much does it actually cost, in dollars and cents, to run a central heat pump for an hour in winter or summer? The answer depends on several factors — but thanks to the HVAC systems we’ve installed in the field, we have the exact numbers.

In this article, we share real-life data from three of our recent projects in Laval, Longueuil, and Boisbriand. We break down actual hourly energy usage, costs based on Hydro-Québec rates, and the key variables that significantly impact consumption.

What We Measured: Real Projects, Verified Data

We installed smart energy meters on three homes equipped with central heat pumps installed by our team. For 60 consecutive days, we tracked the average hourly consumption of each unit, separating data into two categories: heating and cooling.

Here’s a summary of the analyzed projects:

1. Laval – Bosch BOVA 36,000 BTU (Heating)

• Model: Bosch BOVA 36,000 BTU Inverter

• Refrigerant: R-454B

• Home Type: 1,200 sq. ft. bungalow, average insulation

• Mode Analyzed: heating in January (temperatures from -10°C to -25°C)

• Average hourly consumption: 2.78 kWh

• Hourly cost (Hydro-Québec Rate D): $0.286/hour

2. Longueuil – Gree Flexx 48,000 BTU (Cooling)

• Model: Gree Flexx 4 Ton – Inverter technology

• Refrigerant: R-32

• Home Type: 2-storey cottage, 1,800 sq. ft.

• Mode Analyzed: cooling in July (27°C to 33°C)

• Average hourly consumption: 1.92 kWh

• Hourly cost (Hydro-Québec Rate D): $0.197/hour

3. Boisbriand – Lennox EL18XPV 60,000 BTU (Heating)

• Model: Lennox EL18XPV, 5 Tons, compatible with existing plenum

• Refrigerant: R-410A

• Home Type: multi-generational home, 2,200 sq. ft.

• Mode Analyzed: heating in February

• Average hourly consumption: 3.65 kWh

• Hourly cost (Hydro-Québec Rate D): $0.375/hour

How Are These Numbers Calculated?

The calculation is simple:

kWh per hour × Hydro-Québec cost per kWh
The residential Rate D from Hydro-Québec is currently $0.1039/kWh (as of January 1, 2025). This applies up to a set monthly usage, after which a slightly higher rate kicks in. For this analysis, we’ve used the base rate.

What Factors Influence the Hourly Cost?

1. The Heat Pump’s BTU Capacity

The higher the central heat pump’s capacity (in BTU), the more electricity it uses per hour — but that doesn’t mean it’s less efficient. Proper sizing allows the system to run longer at low speed instead of short, high-speed bursts.

2. Outdoor Temperature

In heating mode, the lower the outdoor temperature, the harder the heat pump has to work to maintain indoor comfort. Some models retain 80% of capacity at -25°C, while others drop to 40%.

3. Energy Efficiency (SEER, HSPF)

High-end models like the Bosch IDS Premium or the Lennox SL25XPV boast SEER ratings over 20 and HSPF ratings above 10, lowering hourly consumption per BTU delivered.

4. Thermostat Settings

A 1°C difference can result in up to 7% more energy use. Heating your home to 21°C instead of 23°C yields major savings.

5. The State of the HVAC Installation

Poorly insulated ducts, improper return air, or a miscalibrated blower can lengthen run time — and raise hourly costs. That’s why professional HVAC installation makes all the difference.

Common Mistakes to Avoid

• Undersizing or oversizing the unit
  This directly affects how long the system runs at full speed.

• Skipping annual HVAC maintenance
  A dirty filter alone can raise consumption by 10–15%.

• Choosing a unit not suited for Québec’s climate
  Some systems lose effectiveness below -15°C. Make sure your model is certified for cold climates.

• Overlooking daily habits
  Leaving windows open or keeping the system at 22°C while away are small habits that can needlessly inflate your energy bill.

Our Recommendations at AirGreen

• Always do a full thermal analysis before installing a central heat pump.
  This ensures proper sizing, which translates to performance and savings.

• Choose a high-efficiency Inverter model with strong local support.
  Brands like Bosch, Gree, Lennox, and Goodman are among our top picks for reliability, efficiency, and after-sales service.

• Have your system installed by a certified team.
  A proper HVAC installation optimizes airflow, efficiency, and system longevity.

So What Does a Whole Season Cost?

Let’s take the Laval home as an example:

• Daily run time (winter): about 9 hours

• Hourly cost: $0.286

• Monthly heating runtime: 270 hours

• Monthly cost: $77.22

• 5-month heating season (November to March): approximately $386

This amount is significantly lower than the equivalent cost with an electric furnace, which would have cost between $600 and $900 over the same period.

Conclusion: a central heat pump, when properly selected and professionally installed, typically costs less than $0.30/hour to operate in most Québec scenarios — even during deep winter. The secret lies in tailoring the system to the home, ensuring quality installation, and maintaining it consistently.

At AirGreen, we don’t just sell machines. We design complete HVAC solutions, customized with real data to support every recommendation we make. Have a project in mind? Get your free quote today — serving Montréal, Laval, Longueuil, the North Shore, and the South Shore.