Thinking About a Heat Pump? What Your Electrical Panel Has to Do With It

Heat pumps are having a moment. With energy costs on everyone's mind and rebates in the news, more homeowners are asking whether a heat pump makes sense for their house.

Here is the part that surprises people: a heat pump is a major electrical appliance, not just an HVAC box. Before you sign a contract, here is what to know about the electrical side.

Does a heat pump need its own electrical circuit?

Yes. A heat pump needs a dedicated circuit, meaning a circuit that serves nothing else. The outdoor unit draws significant current, especially on startup, and sharing that circuit with other loads is a code violation and a practical problem.

The circuit size depends on the unit. Your heat pump installer specifies the MCA (minimum circuit ampacity) and MOP (maximum overcurrent protection) for the model, and the electrician sizes the wire and breaker to match.

What it means for you: when you get heat pump quotes, ask each contractor what electrical work is included. Some include it, some expect you to arrange your own electrician, and the difference can be thousands of dollars.

Will my current panel handle a heat pump?

Maybe. This is the question that decides whether your project is straightforward or expensive.

A heat pump adds a large new load to your panel. Whether your existing panel can absorb it depends on the panel's amperage, how many spare breaker spaces it has, and what your home's calculated load already is. An electrician answers this with a load calculation, not a guess.

If the panel cannot handle it, the options are a panel upgrade (typically 100-amp to 200-amp), or in some cases load management devices that stay within code. Either way, you want this answer before you commit to the heat pump, not after.

What it means for you: get the electrical assessment early. Finding out mid-project that your panel cannot support the unit is how budgets explode.

What is an electrical load calculation?

A load calculation is the formal math that determines whether your electrical service can handle everything in your home plus the new heat pump. It accounts for your square footage, existing appliances, heating type, and the new equipment.

In Canada, this follows the Canadian Electrical Code, and in BC the 2024 edition applies. The calculation is not optional guesswork: it is what your permit and inspection are based on.

What it means for you: any electrician quoting panel work for a heat pump should be doing this calculation. If someone quotes a panel upgrade without one, get a second opinion.

What is the difference between a 100-amp and 200-amp panel?

Amps measure how much electrical current your home can draw at once. A 100-amp panel was standard for decades and is fine for many homes. A 200-amp panel roughly doubles that capacity.

The trend pushing upgrades: heat pumps, electric vehicle chargers, induction ranges, and hot tubs all add large loads. A home with two or three of these on a 100-amp panel is usually out of room.

What it means for you: if you are planning a heat pump and already thinking about an EV charger down the road, it can make sense to size the upgrade once for both.

Do heat pump installations need permits and inspections?

The electrical portion does. In BC, new circuits, panel work, and disconnects for a heat pump require an electrical permit, and the work is subject to inspection. Your electrician typically handles the permit as part of the job.

Permits are not red tape for its own sake. The inspection verifies the wire sizing, breaker coordination, and disconnect placement, which is exactly the stuff that causes fires when it is wrong.

What it means for you: if a contractor suggests skipping the permit to save money, that is a red flag. Walk away.

What electrical work does a heat pump installation actually involve?

For a typical ductless or central heat pump, the electrical scope looks like this:

• A dedicated circuit from the panel to the outdoor unit, sized to the MCA/MOP on the nameplate
• A service disconnect within sight of the outdoor unit (code requirement)
• Possibly a panel upgrade or load management, depending on the load calculation
• Permit and inspection coordination

The HVAC contractor handles the refrigerant lines and the indoor head units. The electrician handles everything from the panel outward. On many jobs, both trades are on site.

What it means for you: when comparing heat pump quotes, separate the HVAC price from the electrical price in your head. The cheapest HVAC quote with vague electrical allowances is often the most expensive project.

When should the electrician get involved in a heat pump project?

Before you sign the HVAC contract. An electrical assessment takes an hour and tells you whether your panel is ready, what the electrical scope will cost, and whether any upgrade is needed. That information belongs in your decision, not discovered halfway through the install.

One more thing worth knowing: there may be rebates available that help with the cost of switching to a heat pump. Programs and amounts change, so check our rebates page for current details.

The bottom line

A heat pump is one of the best comfort and efficiency upgrades a BC homeowner can make, but it lives or dies on the electrical planning. Dedicated circuit, load calculation, panel capacity, permits: get those four right and the rest of the project is smooth.

If a heat pump is on your mind this fall, start with the electrical assessment. It is a small step that makes the whole project smoother. Request a quote and we will take a look at your panel. And if you want to verify any contractor's credentials first, Technical Safety BC's licensed contractor lookup is the place to do it.