Choosing the right hot water system is a big decision for any household. It’s something you rely on every day, for showers, washing up, doing the laundry, and it can have a real impact on your energy bills. It depends on your home, lifestyle, and budget. In this guide, we’ll walk you through the pros and cons of both electric and gas hot water systems to help you make an informed choice.
How Do These Systems Work?
Before we compare them, let’s quickly explain how each type works:
Electric Hot Water Systems
Electric units use an element inside the tank to heat water, much like a giant kettle. They’re simple, affordable upfront, and available in both storage and instantaneous models.
Gas Hot Water Systems
Gas systems burn natural gas (or LPG if you’re off the mains) to heat the water. They’re available as continuous flow (instant) or storage systems, and are generally quicker to heat water than electric units.
Pros and Cons of Electric Hot Water
Advantages
- Lower upfront cost – usually cheaper to buy and install
- Easy to install – especially if you already have an electric system
- Available in most areas – electricity is accessible almost everywhere
- Off-peak tariffs – can save on energy costs if you’re on a time-of-use plan
Disadvantages
- Higher running costs – especially if you’re using peak electricity
- Slower recovery – takes longer to reheat water after the tank empties
- Environmental impact – standard electricity is often generated from coal
Pros and Cons of Gas Hot Water
Advantages
- Lower running costs – natural gas is typically cheaper than electricity
- Fast heating – hot water is replenished quickly
- Works during blackouts – great for reliability
- More energy-efficient – especially with continuous flow models
Disadvantages
- Higher upfront cost – slightly more expensive to install
- Needs gas connection – not ideal for homes without natural gas supply
- Ventilation required – for indoor units, correct venting is essential
What About Continuous Flow (Instant) Systems?
Both gas and electric systems are available in continuous flow (aka instantaneous) models. These only heat water when you need it, there’s no storage tank. This makes them:
- More compact (great for smaller homes)
- More energy-efficient (no standby heat loss)
- Ideal for households with lower hot water usage
Gas instant systems are more common and cost-effective, but electric models are available too, particularly useful where gas isn’t an option.
Key Factors to Consider
When deciding between gas and electric, here’s what you need to think about:
Access to Gas
Do you already have natural gas at your property? If not, installing a connection or using LPG may increase costs.
Household Size
Larger families typically use more hot water, which means a gas system (especially continuous flow) may be better suited to keep up with demand.
Energy Efficiency Goals
Looking to cut your carbon footprint? Electric systems paired with solar panels can be a sustainable option, while high-efficiency gas units also perform well.
Budget
Electric systems are cheaper upfront, while gas systems can save more in the long run through lower energy bills.
Space and Installation Requirements
Outdoor plumbing vs indoor setup, ventilation needs, and available wall/floor space can all affect which unit is best.
So, which is best, gas or electric?
If you want lower running costs and quick hot water, gas might be the way to go. But if you’re after a simple, budget-friendly option (and don’t have gas), electric still makes a reliable choice. The good news is, whatever system you choose, the team at Collis Bros Plumbing can install it with confidence.