• An air source heat pump (ASHP) is a heating system that uses an outdoor unit to extract heat from the air and transfer it to the indoor unit to heat a building.
• The outdoor unit contains a compressor, a heat exchanger, and an expansion valve.
• The compressor compresses the refrigerant, increasing its temperature and pressure, causing it to change into a high-pressure, high-temperature gas.
• The refrigerant then flows through the heat exchanger, where it transfers its heat to a fluid, such as water, that circulates through the indoor unit to all radiators.
• As the refrigerant releases its heat, it cools down and turns back into a low-pressure liquid.
• The air source heat pump is also capable of heating hot water in a dwelling as well.

Pre requirements

• The Cavity to be insulated if the property is cavity built
• All roofs to be insulated if they are uninsulated
• Low energy rating (E, F, G)
• If the dwelling doesn't qualify for mains gas central heating.

Dwellings that qualify

• Stone built dwellings
• System built dwellings
• Timber frame dwellings
• Solid brick dwellings
• Cavity built dwellings

• High heat retention storage heaters work by using electricity to heat the ceramic bricks inside the heaters, during off-peak hours, when electricity rates are lower.
• Once the bricks are heated, they retain the heat and release it into the room gradually during the day, providing a steady source of heat.
• The heaters can be controlled by a thermostat, which allows you to set the desired temperature and schedule when you want the heaters to turn on and off.
• Elnur High Heat Retention storage heaters also have a feature called "boost" mode, which allows you to quickly heat up the room when you need it.
• They are more efficient than traditional electric heaters as they use off-peak electricity tariffs and are very efficient at storing heat during the night to release during the day.

The install process of storage heaters

• The installers must first remove any old heating systems in the dwelling.
• All living areas and hallways/landings are to have storage heaters installed.
• If feeds are not present in these areas for storage heaters, the installers must run new feeds, wall mounted and in trunking to the new locations.
• All bedrooms are then to have wall mounted electric heaters that can be plugged in.

Pre requirements

• Only to be installed if the property is unable to have a form of central heating from the above measures
• Low energy rating (E, F, G)
• The dwelling needs to be on off peak tariff or obtain an off-peak tariff
• All roofs to be insulated if uninsulated
• Cavity to be insulated if present and uninsulated

Dwellings that qualify

• Stone built dwellings
• System built dwellings
• Timber frame dwellings
• Solid brick dwellings
• Cavity built dwellings

• A mains gas central heating system is generally a combination boiler connected to the mains gas services within the vicinity.
• The combination boiler is then connected to a wet radiator system inside the house to provide heating.
• The combination boiler will also be connected to any taps or showers to provide hot water to the dwelling (excluding electric showers).

Pre requirements

• The Cavity to be insulated if the property is cavity built
• All roofs to be insulated if they are uninsulated
• Low energy rating (E, F, G)

Dwellings that qualify

• Stone built dwellings
• System built dwellings
• Timber frame dwellings
• Solid brick dwellings
• Cavity built dwellings

• Fuel Storage: Biomass boilers are typically connected to a storage area where the biomass fuel, such as wood pellets, wood chips, or logs, is stored in a hopper or silo. This storage area feeds the fuel into the boiler as needed.
• Fuel Feeding: The biomass fuel is automatically or manually fed into the combustion chamber of the boiler. The rate of fuel delivery is controlled to match the heating demand.
• Combustion: Within the combustion chamber, the biomass fuel is ignited. This can be achieved through various methods, including direct ignition or using an ignition system. The fuel burns, producing heat in the process.
• Heat Exchange: The heat generated by the combustion of biomass is transferred to a heat exchanger. In the heat exchanger, a fluid, typically water, is heated as it circulates through a network of pipes or tubes. The hot water or steam is the primary output of the biomass boiler and can be used for various heating applications.

• Distribution: The hot water is then distributed to the heating system. In a wet heating system, this hot water can be circulated through radiators, underfloor heating systems, or used to provide domestic hot water.
• Ash Removal: As the biomass fuel burns, it leaves behind ash and other combustionresidues. Most modern biomass boilers have an ash removal system, which automatically collects and removes the ash, ensuring efficient and clean operation.
• Control and Regulation: Biomass boilers are equipped with control systems that monitor and regulate various parameters, such as temperature, fuel feed rate, and combustion air supply, to optimize the boiler's performance and maintain safety.These systems and parameters are the reason these systems all have efficiency's over 90%. Biomass boilers are considered a sustainable and renewable energy source because the carbon dioxide emitted during combustion is roughly equal to the amount of CO2 that was absorbed by the biomass as it grew. This makes biomass an environmentally friendly alternative to fossil fuel heating systems, contributing to lower greenhouse gas emissions.

Pre requirements

• The Cavity to be insulated if the property is cavity built
• All roofs to be insulated if they are uninsulated
• Low energy rating (E, F, G)
• If the dwelling doesn't qualify for mains gas central heating.

Dwellings that qualify

• Stone built dwellings
• System built dwellings
• Timber frame dwellings
• Solid brick dwellings
• Cavity built dwellings