Tempstar Heat Pump operating cost & efficiency in Greater Vancouver
A Tempstar heat pump moves heat rather than making it. That single fact is why the running cost behaves nothing like a furnace bill, and why two identical units in two Burnaby houses can produce very different monthly numbers.
Most homeowners ask about efficiency ratings. Technicians ask different questions: how many hours a day is the backup heat energizing, what is the balance point set to, how restricted is the return air, and does the outdoor unit actually shed its defrost water. Those answers move the bill far more than a rating on a sticker.
Greater Vancouver helps you here. Our winters are damp but mild, which is the range heat pumps like. The catch is that damp cold also means more defrost cycles, and coastal salt air near the water is hard on outdoor coils. HeatLand has been sorting out both since 1999. Call (604) 330-3812 for a free written estimate or a diagnostic visit.
What you are actually paying for when a heat pump runs
Three separate loads show up on your bill, and they cost very different amounts per hour of runtime.
The compressor is the cheap one. It uses electricity to move heat that already exists in outdoor air into your home, which is why a heat pump can deliver more heat energy than the electrical energy it consumes. The outdoor fan and indoor blower add a modest, steady draw on top of that.
Backup heat is the expensive one. Electric resistance strips convert electricity to heat one-for-one, with none of the multiplication the compressor gives you. On a dual-fuel setup the backup is the gas furnace instead, which changes the math but not the principle: backup runtime is premium runtime.
Defrost is the third. Periodically the outdoor coil ices up and the system reverses to melt it, usually energizing backup heat during the cycle so you do not feel cold air from the registers. Every defrost costs you twice — the reversal itself, plus the recovery afterward.
So the whole cost question collapses into one practical question: what fraction of your heating hours run on compressor alone? A well-configured Tempstar system in the Lower Mainland should spend most of the season there. If yours does not, something in sizing, controls or airflow is forcing it into the expensive modes, and that is diagnosable.
How efficiency ratings work, and what they do not tell you
Heat pump performance gets described with a few different rating systems. Heating season performance is expressed one way, cooling season another, and instantaneous efficiency at a given outdoor temperature another way again. Each is measured under standardized test conditions in a lab, using a reference climate profile that is not Metro Vancouver.
Rather than quote numbers that may not match your unit, do this: find the model and serial on the data plate of your Tempstar outdoor unit, then pull the manufacturer’s published specification sheet for that exact model, or look the system up in the AHRI directory. AHRI listings matter because they rate the outdoor unit, indoor coil and air handler or furnace as a matched combination. Mixing a new outdoor unit onto an unmatched old indoor coil can put you well below the rating you thought you bought.
What the ratings genuinely tell you is relative standing — one tier versus another under identical test conditions. What they cannot tell you is your bill. They assume correct sizing, correct refrigerant charge, correct airflow and a duct system that is not leaking into a crawlspace. Change any of those and the delivered efficiency drops below the label while the label stays the same.
Treat the rating as the ceiling. Installation quality decides how close you get to it.
Balance point and backup heat: the biggest lever you control
The balance point is the outdoor temperature at which your home’s heat loss equals what the heat pump alone can deliver. Above it, the compressor keeps up on its own. Below it, backup heat has to fill the gap.
Here is where money leaks. Many systems get commissioned with a conservative balance point or an aggressive backup-heat staging rule, so the strips or furnace fire far earlier than they need to. The house is warm, nobody complains, and the bill quietly runs high all winter. In a climate like ours — where a large share of heating hours sit in the mild, above-freezing range — an early balance point can push a lot of runtime into premium mode for no comfort benefit.
A technician checks this by reading the thermostat’s installer configuration, confirming how the outdoor sensor or lockout is wired, and watching a real recovery cycle to see when backup energizes. If backup comes on during a routine setback recovery on a 7°C morning, that is a configuration problem, not a capacity problem.
The related lever is your setback habit. Deep nightly setbacks work well with a furnace. With a heat pump they can backfire, because the fast recovery ramp is exactly what triggers backup heat. Smaller setbacks, or a thermostat with intelligent recovery that ramps early on the compressor, usually cost less over a month.
Sizing and the Lower Mainland housing stock problem
Oversizing is the most common cost mistake we find, and it is baked in at installation.
An oversized heat pump satisfies the thermostat quickly, shuts off, then restarts. Short cycles are inefficient — every startup has a period before the system reaches steady-state performance, and you never get there if you run for six minutes. Short cycling also worsens humidity control in summer and adds wear to the compressor and contactor.
Undersizing pushes the opposite direction: the balance point rises, backup heat carries more of the load, and the bill climbs.
Correct sizing comes from a heat loss and heat gain calculation on your actual house — orientation, window area and glazing type, insulation levels, air tightness, ceiling heights. This matters more here than in a subdivision of identical builds, because Metro Vancouver housing stock is genuinely mixed. A 1950s East Van bungalow with original windows, a 1980s Coquitlam split level, a 2015 Surrey build with a heat recovery ventilator, and a Vancouver character home carved into suites all behave differently. Half of them have had a basement suite added, which changes zoning and load in ways the original ductwork never anticipated.
Rule-of-thumb sizing off square footage, or matching the tonnage of whatever was there before, is how homes end up with an expensive mismatch. Ask for the load calculation.
Defrost cycles in a wet coastal winter
Our winters are humid. That humidity condenses on the outdoor coil when it is running below freezing, and it freezes there. The system then has to melt it off.
A normal defrost is short and self-resolving: the reversing valve flips, the outdoor fan stops, the coil warms, water sheds, and the unit returns to heating. You may see steam rising off the outdoor unit — that is expected and not a fault. What is not normal is defrosting constantly, defrosting on a mild damp day, or coming out of defrost with ice still on the coil.
The usual culprits are physical. The unit sits too low and the base pan drains into a puddle that refreezes and builds up. Landscaping, a fence, or a deck skirt blocks airflow across the coil. The defrost sensor has drifted or lost contact with the tubing. Refrigerant charge is off, which drops coil temperature and makes frost form sooner. Or the outdoor coil fins are packed with cottonwood fluff, dust and — in Steveston, White Rock, or anywhere near open water — salt-driven corrosion that closes off the fin spacing.
Excess defrost costs you directly through backup heat during each cycle. Raising the unit on a proper stand with clear drainage, keeping a good clearance zone around it, and rinsing the coil are cheap fixes with a real payback.
Ductwork, airflow and the filter you forgot
Heat pumps deliver air at a lower temperature than a furnace does. That is normal and by design — but it means the system depends on moving a larger volume of air to deliver the same comfort. Restrict that airflow and efficiency falls immediately.
Start with the filter. A pleated filter that is too restrictive for the system, or any filter left in past its life, chokes return air. Low airflow in heating mode raises head pressure and can trip a limit; in cooling mode it can freeze the indoor coil. Check it monthly during heavy use and replace on schedule.
Then the ducts. Older Lower Mainland homes commonly have undersized returns — sometimes a single central return grille trying to feed a system designed for far more. Retrofit ducts in crawlspaces and unheated garages often leak at joints and lose conditioned air to spaces you are not trying to heat. Flex duct crushed behind storage or kinked around a joist steals capacity silently.
A technician measures rather than guesses: static pressure across the air handler, temperature split across the coil, and blower configuration. High static pressure is the fingerprint of a duct problem, and it is one of the few findings that explains both a high bill and a comfort complaint at the same time.
Sealing and resizing returns often delivers more savings than upgrading equipment.
Dual-fuel, all-electric, and how BC energy pricing shapes the choice
Many Lower Mainland homes end up in one of two configurations, and they cost differently.
All-electric pairs the Tempstar heat pump with electric backup — usually strips in the air handler. Simple, no combustion, no venting. Everything shows up on one utility bill, and the cost swings hard depending on how often those strips run.
Dual-fuel pairs the heat pump with a gas furnace. The control logic switches to gas below a set outdoor temperature. The economics depend on the current relationship between electricity and natural gas rates, which is not fixed and which you should check against your own current BC Hydro and FortisBC rates rather than an assumption made three years ago. Where a dual-fuel switchover point was set once and never revisited, it may no longer reflect what is actually cheaper.
Also relevant: BC Hydro residential billing uses a tiered structure, so the marginal cost of the last kilowatt-hour in a heavy month is not the same as the average. That amplifies the penalty for excess backup heat.
On incentives — CleanBC and FortisBC run programs for heat pump installations, but eligibility, equipment requirements and paperwork change. Confirm current terms directly with the program before you count on anything, and get your contractor’s registration status confirmed in writing first.
Maintenance that actually moves the bill, and what to leave to a technician
Some of this is yours. Some of it is not.
Yours: replace or clean the filter on schedule. Keep two feet of clearance around the outdoor unit and clear leaves, cottonwood fluff and snow from the coil and base. Rinse the outdoor coil gently with a garden hose, fins-side and low pressure, especially if you live near salt water where corrosion closes fin spacing. Keep supply and return grilles unblocked by furniture and rugs. Note when your backup heat indicator shows on the thermostat — a pattern is diagnostic information.
Not yours: anything involving refrigerant. Charge is not a top-up item; a low charge means a leak, and both the diagnosis and the correction require certified handling. Electrical work inside the cabinet, capacitor and contactor testing, defrost board diagnostics, and thermostat installer-level configuration also belong to a technician.
And if your system has a gas furnace as the backup, combustion safety is non-negotiable. If you smell gas or a CO alarm sounds, leave the home and call the gas utility and a licensed technician from outside. Never bypass a safety lockout to keep heat running.
A proper annual service measures rather than eyeballs: static pressure, temperature split, amp draws, superheat and subcooling. That is where drifting efficiency gets caught before it shows up as a bill. Call HeatLand at (604) 330-3812.
Quick Checklist
- Find the model and serial on your Tempstar outdoor unit’s data plate, then look up that exact model’s spec sheet or AHRI listing rather than relying on general efficiency claims.
- Watch your thermostat for the backup heat or auxiliary heat indicator during a normal week and note how often it appears above freezing.
- Replace or clean the air filter on schedule and confirm the filter type is not more restrictive than the system was designed for.
- Clear at least two feet around the outdoor unit, remove leaves and debris from the coil, and confirm meltwater drains away instead of pooling and refreezing.
- Ask for a written heat loss calculation before any replacement or resizing, not a tonnage match to the old equipment.
- Book an annual measured service that records static pressure, temperature split and refrigerant performance so drifting efficiency gets caught early.
| Cost driver | What it does to your bill | Who fixes it |
|---|---|---|
| Backup heat running too early | Shifts heating hours from cheap compressor mode into premium resistance or gas mode all season | Technician adjusts balance point and staging in thermostat installer settings |
| Oversized equipment | Short cycles never reach steady-state efficiency; adds wear and hurts summer humidity control | Technician performs a load calculation; corrected at replacement or with staging changes |
| Restricted airflow (filter, returns, crushed duct) | Reduces delivered capacity and raises static pressure, so the system runs longer for the same comfort | Filter is yours; duct sealing, return resizing and static pressure testing are a technician’s job |
| Excess defrost cycling | Each cycle energizes backup heat and interrupts heating, compounding through a damp winter | Homeowner clears drainage and airflow; technician checks defrost sensor, board and charge |
| Dirty or salt-corroded outdoor coil | Blocks heat transfer, lowers coil temperature, triggers frost sooner and raises runtime | Homeowner rinses gently; technician deep-cleans and assesses corrosion damage |
Frequently Asked Questions
Why is my Tempstar heat pump bill higher than my old furnace bill?
Usually because heating moved from the gas bill to the electricity bill, so the totals look different even when overall energy cost did not rise. The other common cause is backup electric heat running far more than it should, which converts electricity to heat one-for-one with none of the compressor’s multiplication. Compare your combined utility spend across both bills, then have the balance point and backup staging checked before concluding the equipment is at fault.
Is the outdoor unit supposed to steam and stop blowing in winter?
Yes, that is a defrost cycle and it is normal. The system briefly reverses to melt frost off the outdoor coil, the outdoor fan stops, and steam rises as the ice clears. It should be short and end with a clean coil. What is not normal is defrosting very frequently, defrosting on a mild damp day, or emerging from defrost with ice still on the coil or a block of ice in the base pan. Those warrant a diagnostic visit.
Should I turn the thermostat down at night with a heat pump?
Use smaller setbacks than you would with a furnace. A deep overnight drop forces a fast morning recovery, and that fast ramp is exactly what triggers expensive backup heat. A two-degree setback, or a thermostat with intelligent recovery that starts early on compressor only, usually costs less over a month than a large setback that ends in a strip-heat sprint. Watch your auxiliary heat indicator for a week and let that guide the setting.
How much will a heat pump cost me per month in Vancouver?
No honest answer exists without knowing your home. The number depends on your heat loss, insulation and air tightness, how the balance point is configured, whether backup is electric or gas, your duct condition, your thermostat habits, and your current utility rates including BC Hydro’s tiered structure. Anyone quoting a flat monthly figure sight-unseen is guessing. HeatLand will assess your home and provide a free written no-obligation estimate at (604) 330-3812.
Does living near the ocean affect my heat pump’s efficiency?
It can, over time. Salt-laden air accelerates corrosion on outdoor coil fins and cabinet hardware in places like White Rock, Steveston, Tsawwassen and waterfront West Van. Corroded, closing fins reduce heat transfer, which raises runtime and encourages frost formation. Regular gentle rinsing helps considerably. If corrosion is already advanced, a technician should assess whether coil condition is materially hurting performance and whether coastal-rated equipment makes sense at replacement.
Do rebates change what a heat pump costs to run?
Rebates affect purchase cost, not operating cost. They may, however, steer you toward higher-efficiency equipment or better installation practices that do lower running cost. CleanBC and FortisBC program terms, equipment eligibility and contractor registration requirements change over time, so confirm current details with the program directly before assuming anything. Also confirm in writing that your installer holds the registration the program requires, since that is a common reason applications get rejected.
Reviewed by the HeatLand Heating & Cooling team — licensed, insured, TSBC-certified HVAC contractor serving Metro Vancouver & the Fraser Valley since 1999. Error codes, specifications, pricing and rebate programs vary by model and change over time; confirm details against your unit’s own manual, a written quote, and the manufacturer or CleanBC/FortisBC. If you smell gas or your CO alarm sounds, leave the home and call the gas utility and a licensed technician from outside.