Why and How to Transition from Traditional to Instant Gas Hot Water Systems

Every home deserves the assurance of hot water on demand, and a gas hot water system might be the ideal solution. This article will walk you through the numerous advantages, varieties, and essential considerations when investing in a gas hot water system for your home. 

Benefits of a gas hot water system 

Choosing a gas hot water system extends far beyond the convenience of instant hot water. It is a route towards a greener, more cost-conscious, and dependable home. Let’s consider these advantages in more detail:

  1. Reduced greenhouse emissions: Gas hot water systems are a step towards ecological responsibility. Compared to traditional electric water heaters, they emit fewer greenhouse gases, helping protect the planet.
  2. Generally cheaper: In the long-term perspective, gas hot water systems are financially wise. They might require a higher upfront investment, but they offer lower operational costs over time, making them kinder to your budget.
  3. Reliability: A standout advantage of gas hot water systems is their ability to deliver hot water without fail, even during blackouts. Cold showers will become a thing of the past.

Types of gas hot water systems

There are two main categories of gas hot water systems, namely instantaneous and storage, each catering to different needs. Here we examine both of them so that you can understand the key similarities and differences. 

Instantaneous gas hot water systems 

These systems, frequently referred to as ‘continuous flow’ models, are a marvel of modern home convenience. As their name suggests, they provide hot water instantaneously, directly heating the water as it flows through the unit. This process eliminates the need for a storage tank and ensures an uninterrupted supply of hot water, no matter how many baths are drawn or dishes washed throughout the day. 

Gas storage hot water systems 

On the other hand, a gas storage hot water system operates on a somewhat traditional principle. These systems heat a large volume of water and store it in an insulated tank, ready to be drawn upon as needed. While the capacity of the tank limits the volume of hot water available at any one time, these systems usually recover quite quickly, reheating water as it’s used. 

What to consider when choosing a gas hot water system 

Selecting a gas hot water system requires you to weigh up several key factors. Here are some of the most important things that you’ll want to keep in mind when making a decision: 

  • Your hot water needs: Estimate your household’s daily hot water requirement, considering the number of residents and their usage patterns. This helps in determining the appropriate system size and type.
  • System energy efficiency: Efficiency is key, both for the environment and your bills. Opt for models with higher energy efficiency ratings to ensure maximum cost-effectiveness and minimal emissions.
  • Lifespan: Gas hot water systems are durable and can provide years of consistent service. Assess the system’s anticipated lifespan to understand its potential return on investment.
  • System size: A system’s size should align with your home’s hot water demands. It should be large enough to cater to peak usage but not so excessive that it wastes energy.
  • Costs: Both initial purchase price and ongoing expenses matter. Gas hot water systems may require more upfront investment, but their lower operational costs often result in long-term savings.
  • Recovery rate: This is how swiftly the system can reheat water once depleted. A system with a high recovery rate is beneficial during high-demand periods.


As we’ve explored, transitioning to a gas hot water system is a step towards a greener, more cost-effective, and dependable home. Whether you opt for an instantaneous or storage system, making the right choice depends on understanding your unique hot water needs. 

If you’re still unsure, don’t hesitate to seek professional advice. We recommend that you speak to a licensed plumber about your hot water system needs. They can provide expert insight and help you navigate the options.