When selecting a gas hot water system, key factors include heating method, storage vs continuous flow, size to meet demand, running costs over lifetime, and energy efficiency rating. Weigh up options like instantaneous, storage and heat pump.
When selecting a new gas hot water system, there are several key factors to consider:
The different types of main fuel for gas systems are natural gas and LPG. Natural gas can result in long-term cost savings. LPG offers flexibility with bottled gas when natural gas isn’t available.
Aim for a 5-6 star energy rating. A higher energy rating equates to greater efficiency.
Heat pump water heaters can be up to 80% more efficient compared to traditional electric or gas storage water heaters.
Select a water heater appropriately sized for your household’s water heating needs. Select a model based on daily hot water demand and the number of people in your household to avoid running out when multiple outlets are in use simultaneously.
Consider the technology of continuous flow hot water or water storage tank systems. Continuous flow water heater systems heat water on demand, while storage tanks hold a volume of pre-heated water. Each have their own pros cons to carefully consider.
Professional advice is invaluable in determining the most suitable water system for your home.
When it comes to fuel types, water heating systems such as gas hot water units have two main options:
Gas hot water systems, particularly those with solar options, tend to be more cost-effective than other fuels. Natural gas prices tend to be lower than LPG. Natural gas, supplied through existing pipelines, presents a convenient fuel source if connected to your home.
LPG, a tank system alternative, offers flexibility without needing a mains connection. However, the cost of replacing and refilling bottled LPG can accumulate over time. Furthermore, LPG generally incurs higher per-unit energy costs than natural gas.
In terms of energy efficiency, when installing a new hot water system it’s recommended to choose a high rating 5-6 star energy efficient model.
A higher energy star rating denotes a hot water system that is both efficient and cost-effective, while also being more environmentally friendly.
Solar hot water systems with solar-boosted features and heat pump systems currently lead the market in energy efficiency.
When it comes to assessing options, when comes to types water systems for gas, there are two main options:
Storage tank hot water systems heat a set volume within an insulated tank and are also known as conventional hot water heaters. These are suitable for homes with regular water use, allowing for swift reheating and successive use.
However, they can waste energy by maintaining a constant minimum water temperature. Good insulation in a tank minimises this standby energy loss.
Instantaneous systems heat cold water on demand using a heat exchanger, eliminating the need for a storage tank.
These systems heat water as needed without standby losses, making them efficient for homes with intermittent water usage. However, if used frequently for small amounts, on-demand systems may not reach optimal operating temperatures, reducing their energy efficiency.
Choosing the most efficient hot water system—storage tank or instantaneous—depends on your household’s water usage and needs.
When it comes to installation and running costs, we acknowledge that gas hot water systems vary:
The installation cost for a basic natural gas storage tank system ranges from $1,000 to $2,000. Advanced electric hot water systems like storage and heat pumps may have installation costs ranging from $2,000 to $4,000.
Ongoing running costs that will reflect on your energy bills depend on the system’s efficiency rating, fuel type, and household usage patterns. But as a guide:
As heat pumps utilise renewable energy and emit minimal greenhouse gas emissions, choosing these systems can help you save money, approximately $150 per year compared to gas, while reducing environmental impact.
When determining what size gas hot water system to install, it’s important to consider the number of people in your household and your expected daily hot water usage.
As a general guideline, it’s recommended to allow:
For instance, a 4-person household without efficient fixtures requires a system that can handle 320 to 400 litres daily. An appropriately size hot water system with a storage tank would be around 400 litres.
It’s best to oversize your system slightly to account for future demand increases. Undersizing your hot water system can lead to running out during peak times.
A plumbing professional can assess the correct size for your hot water system based on a thorough site inspection and usage evaluation.
When it comes to reliable gas hot water system brands, some top options to consider include, where you can find more details:
Rheem, a top Australian brand, is noted for its robust and reliable gas storage hot water systems. Their gas storage and continuous flow models come with up to 15 years on the water tank heat exchanger and 5 years on parts. Rheem offers good warranty coverage and responsive after-sales support.
Known for their sleek tankless flow gas systems, Rinnai offers both quality manufacturing and technology innovations. Rinnai’s standout features include exact temperature control electronically and frost protection for colder regions. They offer 12 year warranties on heat exchangers.
Dux, an established Australian brand, manufactures gas hot water units notable for their high energy efficiency ratings. Storage and instantaneous models come with warranties extending more than 12 years, plus they have a strong reputation for reliable post-installation service.
For high-end quality, the best gas hot water solutions come from German engineering brand Bosch, which delivers both continuous gas systems and heat pump models pairing solar electricity with great energy savings. Bosch offers warranties of up to 10 years, complemented by extensive after-sales support.
When comparing gas hot water brands, look at reliability, warranty terms, efficiency, features, after-sales support, and overall value for money based on your household’s needs.
To keep your gas hot water system running efficiently and maximise its lifespan, regular maintenance is important.
Gas hot water systems typically feature warranties of over 5 years on parts and 10-15 years for heat exchangers, covering manufacturing and workmanship defects. For coverage:
Understanding the terms of your unit’s warranty gives you peace of mind that any early issues will be promptly rectified by the manufacturer.
When selecting a gas hot water system, key factors include heating method, storage vs continuous flow, size to meet demand, running costs over lifetime, and energy efficiency rating. Weigh up options like instantaneous, storage and heat pump.
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