Buying Your Own Heat Pump Online? 7 Things to Know Before You Order.
One of the most common questions we get is: "If I buy my own heat pump, would you install it?"
It's a fair question. You can find heat pumps online, sometimes with a complete install kit included, at prices that look a lot lower than a contractor's quote. If you're trying to be smart with your money, it makes sense to ask.
The short answer: the price on the box is rarely the price you end up paying. A heat pump isn't a plug-in appliance. It's a heating system that has to be matched to your home, connected to refrigerant lines, wired into your panel, and supported for the next 10+ years. Here's what we'd want any homeowner to know before they order one.
1. Size matters more than brand
Heat pumps are rated in BTUs, and choosing the right size is the single biggest factor in how well one works. Most people buying online pick a size based on square footage, or go bigger "just to be safe." Both can backfire.
Too big and the unit heats or cools the room in short bursts, then shuts off. This is called short cycling. It wears out the compressor faster, wastes electricity, and in summer it shuts off before it has time to pull moisture out of the air. The room hits the right temperature but still feels damp and clammy, which matters in a coastal climate like Cape Breton.
Too small and it runs flat out on cold nights and still can't keep up, so your backup heat (oil, baseboards) does the work you paid the heat pump to do.
Proper sizing looks at your insulation, windows, air leaks, ceiling height, which way rooms face, and how air will move through the house. Two homes with the same square footage can need very different equipment. That assessment is the part of the job you can't buy online.
2. Two heat pumps with the same label can perform very differently
Not all heat pumps are built for our winters, even within the same brand. Manufacturers sell several product lines at different price points, and the low-temperature rating on a product page tells you very little on its own. "Works down to -25°C" only means the unit keeps running at that temperature. It doesn't say how much heat it actually delivers.
Two things matter far more:
Capacity retention: what percentage of its rated heat output the unit still produces at -8°C, -15°C and -25°C. One unit may hold most of its capacity deep into winter while another, with the same "rating," drops to a fraction of it, and your backup heat makes up the difference.
The efficiency curve: how much heat you get for each unit of electricity as temperatures fall. A unit whose efficiency drops off sharply costs more to run exactly when you're using it most.
Online listings rarely show either. We choose equipment by looking at the manufacturer's performance data across our actual winter temperatures. That's how you know what a heat pump will do in February, not just whether it will turn on.
3. The "everything included" kit is where corners get cut
Many online heat pumps come bundled with wall brackets, a line set, line covers and insulation. It looks convenient. In practice, those accessories are usually the cheapest version of each part, chosen to hit a price point.
What we commonly see with bundled kits:
Thin insulation on the refrigerant lines, which breaks down in sun and weather and lets the lines sweat or lose efficiency.
Fixed-length or pre-charged line sets, so extra length gets coiled behind the unit or the unit gets placed where the line reaches, not where it works best.
Quick-connect fittings that are one more joint where refrigerant can slowly leak.
Light-duty brackets and covers that rust, crack or fade within a few seasons.
A professional install uses materials chosen for the job: properly sized copper cut to length, UV-rated insulation, flare or brazed connections done to spec, a pressure test and vacuum before the system is ever run, and a stand or bracket that keeps the outdoor unit above snow line. Most of what makes a heat pump last 15 years is in those details.
4. Read the warranty fine print
Most heat pump manufacturers require installation by a licensed HVAC contractor for the warranty to apply, and some require the install to be registered. Buy a unit online, have it installed by someone else, or install it yourself, and you may find the warranty on the product page doesn't cover you.
It's also worth knowing that most contractors who agree to install customer-supplied equipment will warranty their labour only, not the unit. If the compressor fails in year three, you're dealing with the online seller on your own.
5. Who do you call when something goes wrong?
When we supply the heat pump, you know you have a machine you can be confident in, and one we can confidently stand behind. We chose it, sized it and set it up for your home. If a part ever fails, you make one call. We diagnose the problem, and if it's a manufacturer defect, we handle the warranty claim for you.
When the equipment came from one place and the install from another, every problem starts with a debate about whose fault it is: the unit, the install or the kit. Nobody fully owns the outcome.
Parts matter too. Brands sold mainly online often have no local distributor, so a failed circuit board or fan motor can mean weeks without heat while a part ships. A local installer buying through a local supplier can usually get parts, and get you running again, much faster. In January, that difference is real.
6. You could lose access to rebates
In Nova Scotia, heat pump rebates through Efficiency Nova Scotia can be worth thousands of dollars, and they come with rules. Eligible units generally have to be on Efficiency Nova Scotia's rebate-eligible list, installed by a qualified contractor, and many programs require approval before any work is done.
Many heat pumps sold online aren't on that list. Buying first and asking about rebates later is one of the most common ways homeowners miss out on money that would have covered much of the difference they were trying to save. Efficiency Nova Scotia has also publicly warned about sellers making rebate promises they can't keep, so it's worth confirming eligibility before you spend anything.
7. Refrigerant and electrical work aren't DIY jobs
Connecting, testing and charging refrigerant lines is work for a certified technician, and newer refrigerants like R-32 come with specific handling and installation requirements. The electrical side, a dedicated circuit and disconnect from your panel, needs to be done to code as well.
If it's done wrong, the risks go beyond a unit that underperforms: refrigerant leaks, electrical hazards, and potential questions from your insurer if there's ever a claim tied to the system.
So, does buying your own actually save money?
Sometimes the equipment is cheaper online. But add up the full picture:
What you're comparing | Buying online + separate installer | Supplied and installed by one contractor |
Sizing | Your best guess | Based on an assessment of your home |
Cold-weather performance | Hard to verify | Capacity and efficiency checked at local winter temperatures |
Install materials | Bundled kit | Professional-grade, cut to fit |
Manufacturer warranty | Often limited or void | Fully registered |
Labour warranty | Labour only, if any | Covers the whole system |
Rebates | Often not eligible | Handled as part of the job |
When something breaks | Seller vs installer | One call |
The savings on the box can disappear quickly with one lost rebate, one uncovered repair, or a system that never heats the house the way you expected. And unlike a TV, you'll live with this decision every winter for the next 15 years.
Before you click “buy”
You wouldn't buy your own electrical panel and wiring without talking to an electrician first. A heat pump deserves the same thinking. It's your home's heating system, not an appliance.
If you've already found a unit online, we're happy to look at it with you. Send us the model number and we'll tell you honestly whether it suits your home, how it handles our winters, and whether it qualifies for rebates. No pressure either way. Sometimes the most useful thing we can do is help you avoid an expensive mistake.
Call BEST Heat Pump Solutions at 902-220-3546 or request a free in-home assessment.
Frequently asked questions
Will BEST install a heat pump I bought myself? No. As a company, we decided to install only equipment we supply, because it's the only way we can fully stand behind the system, from how it performs to how the warranty is handled. If you've found a unit you like, send us the model number and we'll give you an honest opinion on it.
Are DIY heat pump kits worth it? They can look cheaper up front, but bundled accessories are usually lower quality, sizing is a guess, and support after the sale is limited. Over the life of the system, they often cost more.
How do I know what size heat pump I need? Square footage alone isn't enough. Insulation, windows, air leaks, ceiling height and layout all change the answer. An in-home assessment is the reliable way to size it.
Do online heat pumps qualify for Efficiency Nova Scotia rebates? Only if the model is on Efficiency Nova Scotia's rebate-eligible list and the program's rules are followed, which often include pre-approval and a qualified installer. Check before you buy.
What happens if my heat pump breaks down in winter? With a supply-and-install contractor, you make one call. With online equipment, you may have to deal with the seller for warranty and wait for parts to ship.
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