Power prices in New Zealand have increased significantly over recent years. For most households, the reasons feel largely outside their control. But there is one contributing factor that often goes unnoticed, and unlike the price of electricity, it is something you can actually do something about.
Your home energy systems may be quietly making the problem worse.
How a Heat Pump Loses Efficiency
A heat pump in good condition is one of the most efficient heating technologies available. For every unit of electricity it consumes, it can produce three to five units of heat. That ratio is the reason heat pumps are so cost-effective when they are running well.
The problem is that ratio degrades over time, and most homeowners never know it is happening.
Dust and grime accumulate on the indoor coil, creating a layer of insulation between the coil and the air it is trying to heat or cool. The system has to work harder to push heat through that layer. The motor runs longer to reach the same temperature. The compressor cycles more frequently. The electricity consumption climbs.
This is the Set and Forget Cost: the invisible, compounding loss of efficiency that adds to your power bill month after month while the system appears to be working normally.
The Numbers Behind the Set and Forget Cost
Research consistently shows that unmaintained heat pumps can lose between 20 and 30 percent of their efficiency within a few years of installation. On a typical Auckland home running a heat pump through winter, that translates to hundreds of dollars in unnecessary power costs per year, on top of whatever the market price of electricity is doing.
The system still heats the room. It just costs significantly more to do it than it should.
Your Home Is an Integrated System
The Set and Forget Cost does not only affect individual units. Because your home's energy systems are interconnected, a problem in one area compounds across others.
A ventilation system that is not moving air efficiently forces your heat pump to work harder to maintain temperature. A solar installation generating 20 percent less power than it should shifts more of your consumption back to the grid. These losses stack quietly, because no single system fails visibly. They just gradually cost you more.
What Maintenance Actually Recovers
A professional service removes the physical resistance that causes efficiency loss. Cleaning the indoor coil, the fan, the filters, and the outdoor unit restores airflow and heat transfer to near-original performance levels.
In most cases, a single service visit recovers enough efficiency that the cost of the clean is offset within a few months of lower power bills. For Annual Care Plan customers, the savings compound across every system in the home.
Finding Your Set and Forget Cost
Not every home will show the same symptoms. The impact depends on how old your systems are, how hard they work, and how long it has been since they were last serviced.
Our free 3-minute Home Energy Health Assessment is designed to surface exactly this. Answer 12 quick questions and receive a personalised report showing where your home is likely losing efficiency and what a service would recover.
If your power bill has been climbing and your systems have not been serviced recently, the Set and Forget Cost is worth investigating. It will not fix the price of electricity. But it will make sure your systems are not adding unnecessarily to the problem.