Can an eco heating system save you money?

We explain the benefits of eco heating systems and how they can save you money. We look at solar heating, air source heat pumps and wood-fuelled heating systems

Reducing carbon emissions and looking after the planet is essential for our future, but there’s also a financial reason for eco-proofing homes – it can save you money.

Dean Murray at Green Deal Solutions says: ‘Rural homeowners who are not connected to mains gas will make the most savings, but anyone using LPG or oil should consider switching. The ideal solution is to combine two technologies, such as an air source heat pump or biomass boiler along with solar thermal panels.’

Martyn Bridges at Worcester Bosch Group advises: ‘Like any heating system, it needs to be right for your home, but just one type like solar thermal for hot water can cut bills. However, you must ensure your home is properly insulated first.’

But first: what are the options available and how to they compare in terms of efficiency, green credentials, and cost? Read on to get all the info you need about solar water heating, air source pumps, ground source pumps, and biomass boilers.

Solar water heating

What it is

Solar water heating, as its name suggests, uses heat from the sun to warm hot water in your home.  The system will heat your house throughout the year, although you may need to use additional energy sources during the winter months. Generally, solar water heating will generate around 60 per cent of your home's hot water every year. Easy to install, solar water heating uses a special kind of solar panel, or flat plate collectors, which are fitted to the roof. The water that they heat will need to be stored in a large cylinder fitted with a solar heating coil. 

How much does it cost?

Depending on the type of property you have, solar water heating will cost £3,000 to £5,000 to install. The good news is, maintenance costs are minimal, so there real savings to made on annual energy bills in future. 

Is it right for my home? 

Solar water heating works particularly well in homes that aren't connected to mains gas supply. You don't have to have masses of roof space, as the thermal collector panels can be fitted on to a wall – just make sure it gets plenty of sunlight. You will also need to consider if you have the space for a large water cylinder. You'll also need to check that your boiler is compatible with solar heating – as a rule of thumb, if you have a hot water tank, then it probably is. 

Solar water heating

Air source heat pumps

What it is

Air source heat pumps convert energy from the air. The mechanism is simple: an outside fan draws air into a fluid, which then passes through a container that raises the fluid's temperature – heat that then gets distributed through the home's heating system. Although it is not completely impact-free, requiring electricity to run, an air source heat pump is up to five times more efficient than a traditional gas central heating system. This type of heating is especially efficient when working at a consistently low temperature, making them ideal for underfloor heating. A variant if an air source pump is an air-to-air pump that operates by circulating air between fans.  

How much does it cost?

An air-to-water unit will cost you around £8,000 to install; and air-to-air unit is considerably cheaper at around £2,000, but it's unlikely to generate enough heat to provide you with hot water. An air source heating system will save you around £500 a year in energy depending on your supplier.

Is it right for my home?

This heating system will work best in a home that doesn't have mains gas; because of the lower water temperatures it needs, it will give best results if you are primarily using underfloor heating, rather than radiators. And, crucially, if you are thinking of installing an air source heat pump, ensure your home is well-insulated first to maximise efficiency. 

An air source heat pump unit

Ground source heat pumps

What it is

Ground source heat pumps utilise the energy stored in the earth and are fitted under ground in your garden. They can be laid either horizontally at a depth of around 1.5m or vertically in a deep borehole if you have limited land available. Like air source heat pumps, this heating system uses electricity – it delivers the energy it collects from the earth to your hot water tank. The good news is that, at the depth the pipes are installed, the temperature remains pretty constant, so you can use this heating system throughout the year. Ground source heating should be able to provide you with all of your energy needs, including hot water.

How much does it cost?

Ground source heating will cost around £13,000 to install – more expensive and labour-intensive than air source heat pumps, but also more efficient. Energy savings can add up to £600 per year depending on your fuel. 

Is it right for my home?

Like air source heating systems, a ground source heat pump will perform best in a well-insulated home. You will notice that your radiators will be cooler to the touch than when using traditional central heating; on the up side, though, this lower heat will be delivered over a much longer period of time. As with all the other alternative heating systems we've covered, ground source heating is not the best option for replacing mains gas; it will, however, work very well for replacing an electric heating system.

Ground source heat pump

Wood-fuelled heating systems

What it is

Wood-fuelled heating systems, or biomass heating systems, use a biomass boiler with your central heating system and are similar to conventional boilers. They are popular, since they can be connected to an existing system, eliminating the need to complex pipe installation. 

How much does it cost?

An automatically fed wood pellet boiler will cost around £12,000 including installation; manually fed boilers will come cheaper. It will save you around £600 a year. 

Is it right for my home?

The main consideration with installing a biomass boiler is space, as they tend to be larger than regular boilers. There are, however, smaller, freestanding models that will suit a smaller property. 

The Renewable Heat Incentive

The Renewable Heat Incentive is a government scheme aimed to increase the uptake of renewable energy across the UK and came into effect in 2014. It offers financial support to those with newly installed renewable energy systems at least until 2020, when the scheme will be reformed. To find out more about the proposed changes, visit the Energy Saving Trust.

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