Which is Best for your Home?
Choosing between instant and storage hot water systems depends on several key factors specific to each household. The right choice balances efficiency, cost, and practical considerations.
Consider Demand and Usage
Assessing your household’s hot water needs is crucial. Instant systems suit smaller households with lower demand, providing hot water on-demand without storage. They’re ideal for 1-2 person homes or where usage is spread throughout the day.
Storage systems are better for larger families or homes with high simultaneous demand. They can handle multiple showers, dishwashers, and washing machines running concurrently. However, they may struggle during peak times if undersized.
For average-sized families, a 125L to 175L tank usually suffices. Larger households might need more capacity.
Price and Energy Efficiency
Upfront costs differ significantly between the two systems. Instant units are generally more expensive to purchase and install but can be more energy-efficient long-term.
Storage systems have lower initial costs but higher ongoing expenses due to standby heat loss. They continuously heat water, even when not in use.
Energy ratings are crucial for both types:
- Storage: Look for high star ratings (5-6 stars)
- Instant: Seek units with low flow rates and high energy factors
Over time, instant systems often prove more cost-effective, especially for smaller households. However, this depends on usage patterns and local energy prices.
Environmental Factors
Environmental impact is an important consideration for many homeowners. Instant systems typically have a lower carbon footprint due to their on-demand nature.
Storage systems, while less efficient, can be more environmentally friendly when paired with solar heating. This combination significantly reduces energy consumption and greenhouse gas emissions.
Water usage is another factor. Instant systems may waste less water as they heat quickly, reducing the time spent waiting for hot water to reach taps.
Available Space
Space constraints can significantly influence the choice between instant and storage systems. Instant units are compact, often wall-mounted, and ideal for homes with limited space.
Storage tanks require more room:
- Indoor tanks: Need a dedicated closet or utility area
- Outdoor tanks: Require appropriate weatherproofing and positioning
For apartments or small homes, instant systems offer a space-saving solution. Larger homes with ample space might find storage systems more practical, especially if considering solar integration.
Aesthetic Considerations
The visual impact of hot water systems can affect a home’s appearance. Instant systems are typically sleek and unobtrusive, easily hidden in cabinets or mounted discreetly on walls.
Storage tanks, particularly outdoor models, are more visible:
- Can be screened with plants or fencing
- Some modern designs offer improved aesthetics
Indoor storage tanks might impact room layouts but can be incorporated into utility areas. Instant systems offer more flexibility in placement, allowing for installation closer to points of use, which can improve efficiency.
