Heat Pump vs Gas Hot Water — Which Is Right for Your Northern Beaches Home?
— Northern Beaches Hot Water
Gas or heat pump? With councils phasing out gas and electricity prices dropping, we break down the real costs, pros, and cons for Northern Beaches homeowners based on 25+ years of installing both.
This is the most common question we get right now: should I stick with gas or switch to a heat pump? With North Sydney Council phasing out gas from July 2026 and electricity prices dropping, the answer is shifting — but it depends on your situation.
We've been installing both gas and heat pump systems across the Northern Beaches for over 25 years. Here's an honest comparison based on what we actually see on the job — not what the marketing brochures say.
Running Costs — The Numbers
This is where heat pumps win decisively. Using current NSW energy prices for a 3–4 person household:
- Heat pump: ~$480 per year
- Gas continuous flow (6-star): ~$820 per year
- Gas storage: ~$1,000 per year
That's a saving of $340–$520 per year with a heat pump. But here's the number most people forget: the gas connection fee. If hot water is the only reason you're connected to gas, you're paying $280+ per year just for the privilege. Add that to the running cost and gas is costing you $1,100–$1,280 per year compared to $480 for a heat pump.
Over 10 years, that's $6,200–$8,000 in savings — more than the cost of buying and installing a heat pump.
Upfront Cost
Gas continuous flow systems are generally cheaper to buy and install. Heat pumps cost more upfront, but the exact price depends on the brand, model, tank size, and site complexity — every install is different, so we always quote on-site rather than guessing.
Government rebates through the Small-scale Technology Certificate (STC) scheme and NSW Energy Savings Scheme can reduce the heat pump cost and close the gap. The exact amount depends on your location and system. Worth noting: the STC scheme reduces each year until 2030, so the rebate gets smaller the longer you wait.
What About the Gas Phase-Out?
This is the big factor that's changing the equation. North Sydney Council has confirmed gas will be phased out of new developments from 1 July 2026. The City of Sydney already banned gas in new builds from January 2026. More councils across Sydney are expected to follow.
If you're building new or doing a major renovation on the Northern Beaches, it's worth considering that a gas system installed today may not align with where regulations are heading. Nobody is ripping out existing gas systems — but the direction is clear.
Performance — How They Actually Work
Gas continuous flow gives you unlimited hot water on demand. Turn the tap, gas fires, hot water flows. It's simple and reliable. The downside is that gas prices only go up, and if the pilot light or ignition fails, you've got nothing until it's fixed.
Heat pumps work differently — they heat a tank of water using refrigeration technology, pulling heat from the air. On the Northern Beaches, our mild climate means heat pumps run at peak efficiency year-round. A quality system like a Reclaim CO2 heat pump can heat a full tank in 2–3 hours and holds temperature well.
The honest trade-off: if your household uses a very large amount of hot water in a short window (think: 4 showers, a dishwasher, and a load of washing all at once), a gas continuous flow system handles that easily. A heat pump with a well-sized tank handles it too, but if you drain the tank completely, you'll wait for it to reheat. For most families, a 250–315L tank never runs out.
Noise
Gas is essentially silent. Heat pumps make noise — the compressor runs when heating water. How much noise depends on the brand. The Reclaim CO2 systems we install run at 37 decibels, which is about the level of a quiet library. Some cheaper brands are significantly louder. If the unit sits near a bedroom window or a neighbour's fence, brand choice matters.
Space Requirements
Gas continuous flow units are compact — they mount on a wall and take up minimal space. That's a real advantage for Manly apartments, Mosman terraces, and other properties where space is tight.
Heat pumps need floor space for the tank (similar to a traditional electric or gas storage system) plus clearance around the outdoor compressor unit. Properties with a side passage, garage, or utility area usually have no issues. Very tight sites can be challenging.
Our Recommendation
For most Northern Beaches homes, a heat pump is the better long-term choice. The running cost savings pay for the higher upfront cost within 3–5 years, the gas phase-out trend makes it future-proof, and electricity prices are heading down while gas prices aren't.
Gas continuous flow still makes sense in specific situations: very tight spaces where a tank won't fit, properties with extremely high simultaneous hot water demand, or short-term installations where you won't be in the property long enough to recoup the cost difference.
We install both and we'll give you an honest recommendation based on your actual property and usage — not push whatever has the biggest margin. That's been our approach for 25 years.
Not sure which system is right for your home? We offer free on-site assessments across the Northern Beaches. We'll look at your property, your usage, and your budget and give you an honest recommendation. Call 0448 581 325.
Need hot water help? Call Northern Beaches Hot Water on 0448 581 325.