Renewable Energy

Solar Energy
The most powerful free energy source
One of the fastest growing sectors of renewable energy is the wide and varied field of solar energy. This is in the form of Photovoltaic cells (PV) which generate electricity, and Solar thermal panels which are used to create hot water. Sustainable & economical, Varden Engineering use state of the art products that are distinguished by their modern appearance and fulfil the highest standards of thermal and energy efficiency. We supply high quality solar panels and an installation service to match.

With energy bills soaring and our impact on the environment never far from the news headlines, isn’t it time that you made the decision to switch to solar power for your home energy needs?
In partnership with leading manufacturers we can install PV panels that will not only reduce your electricity bills but will also generate an income from the government by the Feed In Tariff.

The Feed In Tariff means the government, via the energy companies, is commited to pay you for every unit of electricty that your solar panels generate - this rate is guaranteed for the next 25 years and will be index linked making it inflation proof.

Here at Varden Engineering our mission is to supply the most efficient, modern, complete solar hot water and PV systems available and provide a customer support service that is second to none, as well as a professional solar system design and installation service.
Solar Thermal panels can reduce your hot water heating costs by up to 70% annually.

We feel that the introduction of solar systems will help to increase the value of your home, while making it more attractive to future buyers, and saving you money on utility bills.

Why not ask one of our home improvement specialists to come and show you how Varden Engineerings Solar Panels might look on your home?

We can save you up to 70% of your annual hot water heating costs. We can install a system designed to meet your requirements with the latest solar panels.

Why Use Solar Panels?

  • Significantly lower your heating bills
  • More ecologically Friendly
  • Use sustainable resources
  • Increase the value and desirability of your home
  • Fully portable: take your panels, when you move
  • Be the forefront of renewable energy use
  • The sun doesn't need to be shining for them to work

Why use Varden Engineering?

  • We use fully accredited trained installers
  • Using only the best, and quality tested products
  • Highest levels of customer service
  • Only Proven technologies used
  • Consultative approach to your needs
  • Reduce your carbon footprint



Questions and answers

Why should I consider using solar energy?

  • By reducing carbon dioxide emissions, it’s better for the environment and you will also be helping to conserve the world’s rapidly diminishing supplies of gas and oil.
  • By utilising solar energy for hot water will help to reduce the impact of rising oil and gas prices and means that you won’t be as reliant on these conventional fuels.
  • Installing a good solar system can add value to your property.

How does solar DHW heating system work?

  • The principles are quite straightforward. Solar panels (collectors) absorb energy from the sun to heat a fluid that is pumped in a sealed circuit to an indirect coil in a water cylinder to heat the domestic water.

Where are the panels (collectors) fixed?

  • Varden Engineerings high performance solar collectors are easily sited on pitched roofs, flat roofs, or in roof and can be installed on the ground. Ideally the solar panels should face south, but they will work with a small loss of efficiency sited between 30 degrees east and 40 degrees west of south.

Do I want vacuum tube or flat plate collectors?

  • Vacuum tube collectors offer the highest operating efficiency all year round and, due to their low weight and smaller dimensions, offer easier installation and handling. Flat plate collectors should be used when efficiency during autumn, winter and spring is not so important and in areas where a tough collector is preferred.

Is there enough sunshine in this country to make them work?

  • As the panels work on diffused solar radiation as well as direct sunlight, they will even generate small amounts of energy on partially cloudy days. This helps to lower the energy required from your boiler.  The DTI has calculated that there are sufficient solar radiation levels across the whole of the United Kingdom to provide useful energy. In areas with lower solar radiation, the number of collectors can be increased to maximise solar energy usage. In addition the design of our tube collectors ensures that they capture solar radiation at a wide range of angles making them more efficient than other designs


Heat Pumps

The future of energy efficiency

Heat pumps and renewable energy systems are the simple, proven way to cut emissions and drastically reduce the costs of providing hot water and heating for domestic and commercial premises.

Especially efficient when changing from oil-fired heaters or electric storage heaters. Lots of savings on fuel bills.

We're experts in the design and installation of these clean, green, money-saving technologies. For experienced, independent, and fully accredited advice, contact us today.

Why a Heat Pump

Heat pumps move heat in the air into the home to provide a total solution for Domestic Hot Water (DHW) and all heating needs. Because heat pumps simply move energy, rather than creating it by burning fossil fuels, they are very efficient. For every 3-4KW of heat moved into the house around only 1KW of electricity is consumed. This gives a perceived efficiency of 300% sometimes stated as a Co-efficient Of Performance (COP) of 3:1/4:1..

Collecting the Heat
Heat collection is achieved by using a fan to force air, over a heat exchanger (simply a copper coil filled with refrigerant) to extract heat from the air.

The Evaporator
The purpose of the Evaporator is to take heat obtained by the heat exchanger and boil a refrigerant (which boils at approximately -10°C), the act of boiling turns the refrigerant into a vapour which is then moved into the Compressor.
The Compressor
The Compressor does exactly what its name suggests; the vapour is compressed in volume and as its volume reduces its temperature increases. Temperatures of between 75°C and 125°C are achievable and the gas is then fed through a heat exchanger.

Condenser/heat exchanger

Forcing the hot gas across the cold water from the central heating system condenses the refrigerant turning it back into a liquid. As it condenses its heat is passed into the heat exchanger which supplies the DHW and central heating system.

The Expansion Valve
To complete the closed circuit of the heat pump the only thing which needs to be done is reduce the pressure of the condensed liquid and this is done via an Expansion Valve. If retro-fitting, radiators might need upgrading due to lower flow temps than traditional boilers.

Heat Pumps: The Benefits

1. Proven Technology
Heat pumps have been around for years. They’re automatically installed in 90% of new homes in Sweden, 75% of new homes in Switzerland, and 30% of new homes in Germany. In Sweden and Switzerland respectively, 50% and 35% of existing properties have now fitted heat pumps.

2. No Gas Supply Needed!
Heat pumps have none of the risks associated with flammable and polluting oil and gas-fired systems, particularly in terms of leaks and potential carbon monoxide dangers. No fire or safety risks.

3. Fits Your Current Heating System
Heat pumps simply replace existing gas-guzzling systems. They connect to existing heating and hot water systems, and will run an existing radiator set up. Heat pumps can link to wet underfloor heating, and we can advise on and install underfloor heating, if it’s appropriate, but that's entirely separate.

4. Saves up to 70% on Existing Bills
Heat pumps produce savings of between 30% and 70% on existing heating and hot water bills. The exact percentage depends on a range of variables (type of heat pump, previous fuel source, size of premises). As fossil fuel prices (inevitably) rise over coming years, the savings will be greater still.

5. 25 Year Lifespan, Low Maintenance
The average gas boiler has a useful life of around 12 years. Heat pumps have a 25 year lifespan. Boilers lose 2% of their efficiency every year on average and require annual check ups. Heat pumps maintain their efficiency from day one and require no regular maintenance.

6. 400% Efficient
With a high efficiency condensing gas boiler, for every kwh of energy you put in, you can expect to get 0.9kwh of heating out. With heat pumps, for every kwh of energy you put in, you get (on average) 4 kwhs of heat out. So they’re 400% efficient and provide 100% of your heating and hot water.

7. Reduces Carbon Emissions to Zero
Depending on your choice of heat pump, you will reduce your carbon emissions by between 40% and 75%. Heat pumps which are powered by electricity from a green, zero-carbon supplier, will deliver all your home and hot water heating without emitting any carbon whatsoever.

8. Enhances Property Value
Tighter and tighter legal constraints are coming on stream concerning domestic and commercial emissions. Installing heat pumps and renewable systems puts you ahead of the legislation. If you come to sell a home or business premises, it will be far more attractive to purchasers.

9. Generous Grants Available
For home-owners using government (MCS) accredited designers and installers such as ourselves to install heat pumps, substantial grants are available, and for businesses, schools, community and not-for profit organisations, a large range of grants, loans and incentives are now coming on stream.

10. Swimming Pool Heating
and Air Conditioning
If you own a swimming pool, heat pumps offer one of the most efficient and cost-effective ways of water heating. In the summer, a heat pump can operate in reverse to cool your premises.