How to Choose the Right Hot Water Heater to Buy: Best-Rated

A hot water heater is a household appliance designed to heat and maintain water at a set temperature for daily use in showers, taps, and appliances. When choosing the right hot water heater to buy, there are several main steps to consider: selecting the right size, picking the type of hot water system, checking energy efficiency ratings, comparing installation costs, and understanding ongoing maintenance needs. Each of these steps helps ensure you get a hot water system that meets your household's needs while being cost-effective to run.

Professional installation of your hot water heater is essential for several reasons. In Brisbane, all hot water systems must be installed by licensed plumbers to meet strict Australian safety standards. A proper installation ensures your hot water system runs efficiently, which affects both your energy bills and the hot water system's lifespan. Poor installation can lead to safety risks, including gas leaks in gas hot water systems or electrical hazards in electric ones. At Mitchell Plumbing & Gas, our licensed plumbers have extensive experience with all types of hot water systems in Brisbane's unique climate conditions.

The process of selecting a hot water heater involves careful consideration of your household's specific needs. This includes looking at your daily hot water usage, the number of people in your home, and your available space for installation. You'll also need to think about your energy preferences, whether that's gas, electric, solar, or heat pump hot water systems. Each type comes with its own benefits and considerations for Brisbane's climate and your home's setup.

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Step 1: Choose the Size of Hot Water Heater

The size of your hot water heater determines how much hot water your household can use at once. We measure hot water heater size in litres for storage tanks and litres per minute for continuous flow hot water systems.

Getting the right size is about matching your household's needs. A hot water system that's too small means cold showers when you run out of hot water. One that's too big wastes energy heating water you won't use. Here's what we look at when helping Brisbane families choose their hot water system size:

• Small household (1-2 people): 125-160L storage tank or 16-20L/min continuous flow
• Medium household (3-4 people): 160-250L storage tank or 20-24L/min continuous flow
• Large household (5+ people): 250-315L storage tank or 24-32L/min continuous flow

The size you need also depends on your usage patterns. Do you run multiple showers at once? Do you have a large spa bath? These factors affect which size will work best for your home.

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Step 2: Choose the Type of Hot Water Heater

The type of hot water heater you select shapes your daily hot water experience and running costs. At Mitchell Plumbing & Gas, we see five main types of hot water systems commonly used in Brisbane homes:

• Electric Storage Hot Water Systems: These hot water systems heat water using an electric element and store it in an insulated tank. They're reliable and suit homes without gas connections. While they have lower upfront costs, their running costs can be higher than other options.
• Gas Storage Hot Water Systems: These heaters use natural gas or LPG to heat water stored in a tank. They heat water faster than electric hot water systems and typically cost less to run. They're ideal for homes with existing gas connections.
• Continuous Flow Hot Water Systems: Also known as instantaneous hot water systems, these heat water as you need it rather than storing it. They're compact, energy-efficient, and never run out of hot water. They come in both gas and electric models.
• Solar Hot Water Systems: These hot water systems use solar panels to heat water, with an electric or gas booster for cloudy days. They're excellent for Brisbane's sunny climate and offer the lowest running costs, though initial installation costs are higher.
• Heat Pump Hot Water Systems: These work like a reverse air conditioner, extracting heat from the air to warm your water. They're energy-efficient and work well in Brisbane's climate, using about a third of the energy of traditional electric hot water systems.

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Step 3: Take in Consideration the Installation Requirements

Installation requirements are the specific conditions and preparations needed to set up your new hot water system safely and efficiently. These requirements vary based on the type of hot water system you choose and your home's layout.

Space requirements differ significantly between hot water systems. Storage tanks need more room than continuous flow units. Solar hot water systems need suitable roof space with the right orientation. Your chosen location needs to meet safety regulations about ventilation and distance from windows and other utilities.

Other key installation factors include:

• Access to power sources (electricity, gas, or both)
• Water pressure in your area
• Local council regulations
• Building structure and pipe locations
• Drainage requirements
• Existing plumbing configuration

Installation costs vary between hot water system types. While continuous flow hot water systems might cost more to install initially, their efficiency could save money over time. Solar hot water systems have higher installation costs but offer long-term savings through reduced energy bills.

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Step 4: Consider Your Capacity Needs

Capacity needs refer to how much hot water your household uses throughout the day. This is different from just the size of the hot water system and it's about understanding your family's hot water usage patterns and peaks. We look at several factors when assessing capacity needs:

Peak Usage Times: This is when multiple people need hot water at once, like morning routines with several showers back-to-back. Your hot water system needs to handle these busy periods without running cold.

Daily Activities: Different activities need different amounts of hot water:

• Standard shower (10-15 minutes): 75-100 litres
• Bath: 100-150 litres
• Dishwasher cycle: 15-20 litres
• Washing machine cycle: 30-50 litres

Future Changes: Consider if your household might grow or if you're planning additions like a spa bath. These changes affect how much capacity you'll need down the track.

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Step 5: Consider the Maintenance Required

Maintenance keeps your hot water system running efficiently and extends its life. Different types of hot water systems have different maintenance needs, which affect both your time and budget.

Storage hot water Systems need regular checks of:

• Temperature and pressure relief valve (every 6 months)
• Anode rod (every 3-5 years)
• Tank condition and potential sediment build-up
• Signs of leaks or corrosion

Continuous Flow hot water Systems typically need:

• Annual service checks
• Filter cleaning
• Scale removal in hard water areas

Solar Hot Water Systems require:

• Regular panel cleaning
• Checking of solar collector panels
• Testing of the booster system
• Inspection of roof-mounted components

Heat Pump hot water Systems need:

• Air filter cleaning
• Evaporator maintenance
• Regular performance checks
• Checking of refrigerant levels

Regular maintenance helps prevent unexpected breakdowns, maintains efficiency, and keeps your warranty valid. The frequency and complexity of maintenance vary between hot water system types, which might influence your choice based on how hands-on you want to be with hot water system care.

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What Are the Factors in Choosing the Right Hot Water Heater?

When selecting a hot water heater for your Brisbane home, we consider these key factors that shape your decision:

• Size: The physical dimensions and capacity must match both your available space and household needs. Too small, and you'll run out of hot water during peak times. Too large, and you're paying to heat water you won't use.
• Energy Efficiency: Modern hot water systems come with energy ratings that show how efficiently they convert power into heated water. Higher-rated hot water systems cost less to run and have a smaller environmental impact. In Brisbane's climate, solar and heat pump hot water systems often achieve the best efficiency ratings.
• Initial and Running Costs: The total cost includes purchase price, installation, and ongoing operation. While some hot water systems cost more upfront, their lower running costs can save money over time. For example, heat pumps cost more to buy but use less electricity than traditional electric hot water systems.
• Type of Hot Water System: Each type offers different benefits. Storage hot water systems provide reliable hot water reserves but use more energy maintaining temperature. Continuous flow hot water systems heat only what you need but might require a larger gas or electrical supply.
• Maintenance Requirements: Some hot water systems need more frequent servicing than others. Solar hot water systems need panel cleaning and boost checks, while continuous flow units typically need less maintenance but regular descaling in Brisbane's water conditions.

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What Are the Best Types of Hot Water Heaters for Households?

For small households (1-2 people), continuous flow hot water systems work exceptionally well. These hot water systems deliver endless hot water without wasting energy storing it, making them perfect for apartments or small homes with consistent but modest hot water needs. We often recommend these to professional couples or retirees who want efficient, space-saving solutions.

Medium-sized households (3-4 people) benefit from either a mid-sized storage hot water system or a higher-capacity continuous flow unit. Gas storage hot water systems are particularly popular in this category, offering a good balance of capacity and running costs. These suit families with teenagers who might have overlapping shower times or run multiple appliances simultaneously.

Large households (5+ people) typically need either a large storage tank (250L+) or multiple continuous flow units. Solar hot water systems with adequate storage make excellent choices for big families in Brisbane, taking advantage of our sunny climate while managing the higher hot water demand. These hot water systems work well for households with high daily usage patterns, like families with young children who need frequent baths or homes with heavy laundry requirements.

For eco-conscious homes, regardless of size, heat pumps and solar hot water systems stand out as top choices. These hot water systems use renewable energy sources effectively, making them ideal for households looking to reduce their carbon footprint. They're particularly effective in Brisbane's climate, where solar exposure is high and temperatures rarely drop low enough to affect heat pump efficiency.

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What Maintenance is Required for Different Water Heater Types?

Storage tank hot water systems need monthly checks for leaks and corrosion signs, with safety valve tests every six months. Annual maintenance includes a tank flush to remove sediment, while the anode rod needs replacement every 3-5 years.

Continuous flow hot water systems are lower maintenance, requiring water filter cleaning every six months and annual servicing for optimal performance. In Brisbane's hard water areas, descaling is done annually along with gas connection checks.

Solar hot water systems need regular care with quarterly panel cleaning to maintain efficiency. The tempering valve needs checking twice yearly, while the hot water system and booster element need annual maintenance to ensure reliable performance.

Heat pump hot water systems require monthly air filter checks and quarterly coil cleaning. Annual maintenance focuses on checking performance and refrigerant levels to keep the hot water system running efficiently.

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What Size Hot Water Heater is Needed for a Family of Four?

A family of four in Brisbane typically needs a storage tank of 160-250 litres or a continuous flow hot water system rated at 20-24 litres per minute. This size accommodates peak hour demands of 150-200 litres and daily usage between 200-300 litres. This capacity ensures enough hot water for morning routines, evening baths, and running household appliances throughout the day.

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How Does Available Space Influence Water Heater Choice?

The space available in your home significantly affects your hot water system options. Heat pump hot water systems need outdoor installation with a metre clearance on all sides, taking up about 0.5m² of floor space and standing 1.5-2 metres tall. They need good airflow and can't be installed in enclosed spaces.

Continuous flow hot water systems offer the most flexibility for homes with limited space. These wall-mounted units are compact, needing only 0.2-0.3m² of wall space and extending 200-300mm from the wall. They can be installed outdoors or in ventilated indoor areas, though they need specific clearances from windows and doors.

Solar hot water systems require considerable space planning. The solar collectors need 2-4m² of unshaded, north-facing roof space. The storage tank can be ground-mounted, using 1-2m² of floor space, or roof-mounted with appropriate structural support.

Electric storage hot water systems come in various sizes to suit different spaces. Smaller 50L tanks need about 0.5m² of floor space, while larger 300L+ units require 1-2m² plus maintenance access space. These hot water systems can be installed indoors or outdoors, provided there's adequate ventilation.

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What is the Cost Range of Various Hot Water Heaters?

Hot water system costs in Brisbane vary by type, brand, and capacity. Basic electric storage hot water systems typically start at $800, while premium heat pump hot water systems can reach $4,000 or more.

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Hot Water Type

Basic Price Range

Mid-Range Brands (Approx. Cost)

Premium Brands (Approx. Cost)

Electric Storage

$800 – $1,500

Rheem, Dux ($1,000 – $1,800)

Rinnai, Bosch (Up to $2,200)

Gas Continuous Flow

$900 – $1,500

Thermann ($1,200 – $1,800)

Rinnai (Up to $2,500)

Gas Storage

$1,000 – $2,000

Dux, Vulcan ($1,500 – $2,200)

Bosch, Rinnai (Up to $2,500)

Solar Hot Water

$3,000 – $5,000

Rheem Solar ($4,000 – $5,500)

Solahart (Up to $7,000)

Heat Pump

$2,800 – $3,500

Sanden ($3,000 – $3,500)

Rheem, Bosch (Up to $4,000)

Prices vary based on hot water system size, energy efficiency, and additional features. Installation costs and government rebates may also influence the final price.

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What is the Lifespan of a Standard Home Hot Water Heater?

Hot water systems have varying lifespans depending on their type and maintenance. Electric storage hot water systems typically last 8-12 years, while continuous flow hot water systems can function effectively for 15-20 years.

Solar hot water systems have the longest lifespan, often reaching 20-25 years with proper care. The solar collectors can last even longer, though the storage tank might need replacement earlier. Heat pump hot water systems generally last 10-15 years, sitting in the middle range for longevity.

Regular maintenance significantly extends hot water system life. Flushing storage tanks annually can prevent sediment buildup, potentially adding 3-5 years to hot water system life. Replacing anode rods every 3-5 years in storage hot water systems can double their lifespan. For continuous flow hot water systems, annual servicing and descaling can maintain efficiency and extend life by 5+ years.

Continuous flow hot water systems have shown the most consistent longevity in Brisbane's conditions, particularly when protected from direct weather. Storage hot water systems typically show shorter lifespans in areas with hard water unless maintained regularly. Solar hot water systems, while longest-lasting overall, need consistent panel cleaning and tank maintenance to achieve their full lifespan potential.

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What Brands are Known for Reliable Water Heaters?

Rheem stands out in the Australian market with their comprehensive 10-year warranty on storage tanks and proven durability in Brisbane's climate. Their hot water systems offer high energy efficiency ratings and smart technology features for usage monitoring.

Rinnai has built a strong reputation for their continuous flow hot water systems, offering 12-year warranties on heat exchangers. Their units are known for precise temperature control and compact designs that save space while delivering reliable performance.

Bosch brings German engineering to hot water systems, with their units featuring advanced safety systems and energy-efficient operation. Their range includes both storage and continuous flow options, backed by 10-year warranties on major components.

Thermann has gained popularity for offering quality hot water systems at competitive prices. Their range includes energy-efficient heat pumps and solar hot water systems, supported by comprehensive warranties and local service networks.

Dux focuses on Australian conditions, designing hot water systems specifically for our climate. Their storage tanks feature unique ceramic lining for longer life, while their heat pumps are optimised for Brisbane's weather patterns.

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How Long Does it Take to Install a Hot Water Heater in the Home?

A standard hot water system replacement typically takes 2-4 hours when switching to the same type of hot water system. This involves removing the old unit, connecting the new one to existing plumbing and power sources, and testing the hot water system.

Installation time varies significantly based on hot water system type. Continuous flow hot water systems might take 3-5 hours when replacing a storage hot water system due to additional gas line work and mounting requirements. Solar hot water systems need the longest installation time, usually 1-2 days, as they require both roof work for collectors and ground-level tank installation.

Location changes can extend installation time. Moving a hot water system to a new location might add 2-3 hours for new pipework and electrical connections. Underground pipe work or difficult access can further extend the timeline. Weather conditions, particularly for solar installations, can also impact installation schedules.

Preparation work can affect timing too. Upgrading electrical hot water systems for heat pumps or installing new gas lines for continuous flow hot water systems might add several hours to the job. Building permits and inspections, when required, can add days to the overall project timeline.

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How to Choose a Professional Hot Water Heater Installer in Brisbane

A professional hot water installer in Brisbane needs proper licensing and qualifications from Queensland Building and Construction Commission (QBCC). They should hold specific gas fitting licenses for gas hot water system installations and electrical licenses for electric hot water system work.

Look for installers with extensive experience in Brisbane's specific conditions. They should understand local water quality, climate impacts, and council regulations. Ask about their experience with your chosen hot water system type, as different hot water systems require different expertise.

Check their warranty offerings and after-service support. Quality installers provide clear warranty terms and ongoing maintenance support. They should also offer emergency services for unexpected issues and detailed quotes before starting work.

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Why Choose Mitchell Plumbing & Gas for Hot Water Heater Installation in Brisbane

Mitchell Plumbing & Gas for hot water installation brings over a decade of experience in Brisbane's hot water installations. Our plumbers understand the unique challenges of Brisbane's climate and water conditions, ensuring optimal system placement and performance.

We specialise in all types of hot water systems, from traditional storage tanks to modern solar and heat pump options. Our expertise extends to both residential and commercial installations, with each job receiving personalised attention to meet specific needs.

Our work process includes:

• Thorough site assessment before installation
• Clear, upfront pricing with no hidden costs
• Same-day installation options when available
• Full testing and hot water system orientation
• Proper disposal of old hot water systems
• Complete warranty documentation

We take pride in our workmanship, using quality materials and following manufacturer specifications for every installation. Our plumbers stay updated with the latest hot water technologies and installation techniques to provide the best service to Brisbane homes.

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