air source heat pump –  overview

An air source heat pump (ASHP), also known as an Air to Water Heat Pump, work in a similar way to a ground source heat pump, except that it extracts heat out of the surrounding air instead of the ground.

Air source heat pumps are compatible with both radiator based and under floor heating systems. If you do not have suitable land area for a ground source system, or have a very highly insulated new build property, or if you want heating for an outdoor pool then an air source heat pump may well be an ideal solution.

image of Nibe ASHP diagram

How it works

An air source heat pump extracts energy in the form of heat from the outside air in the same way that a fridge extracts heat from its inside. This is the same gas compression refrigeration cycle as a ground source heat pump but this time the energy source is outside air drawn across the evaporator heat exchanger by a fan.

This might sound impossible during the winter months, but given that the refrigerant in a heat pump boils at between -15ºC and -30ºC there is always energy to be extracted from the air regardless of the weather! The key is to understand how to do this efficiently and to understand the limitations of air-source devices in these circumstances and to provide for them.

There are two main types of air source heat pump system:

  • An air-to-water system distributes heat via your wet central heating system.
  • An air-to-air system produces warm air which is circulated through ducting by fans to heat your home. Air-to-air systems are generally restricted to spatial heating and cooling only. They are not eligible for RHI payments and some people find them irritating due to noise and air movement. We would not recommend or fit these systems in a domestic context.
what is biomass

what is biomass?

Biomass is biological material derived from living, or recently living organisms. In the context of biomass for energy this is often used to mean plant based material, but biomass can equally apply to both animal and vegetable derived material.

why use biomass?

why use biomass?

Biomass is a renewable, low carbon fuel that is already widely available throughout the UK. Its production and use also brings additional environmental and social benefits.

but is it really sustainable?

but is it really sustainable?

Yes! As plants grow, each molecule of carbon dioxide they absorb from the air ends up as one atom of carbon in the plant, and two atoms of oxygen which are returned to the atmosphere. When the biomass is burned, each atom of carbon combines with two atoms of oxygen to give one molecule of carbon dioxide.

what type of boiler?

what type of boiler?

There are many different types of biomass boilers available, to suit every application so it may be easiest to first consider the three different types of fuel – wood pellets, wood chip & logs.

other considerations

Heating emitters or distribution system
Air source heat pumps can perform better with under-floor heating systems or warm air heating than with radiator-based systems because of the lower water temperatures required. This does not exclude existing radiator systems provided they are taken into consideration in the design phase.  The radiators will require to be bigger than normal due to the lower operating temperatures.

Plant room sundries if docking with other systems
Dependant on the configuration of the renewable technologies, you may need buffer tanks or higher capacity hot water storage tanks. It is important to consider how large these are and whether you have enough space in your proposed plant room.  We would always clean the old system with a powerflush unit, but even so a heat exchanger can also be a good idea so as to avoid an old system contaminating he new system.

biomass is often chosen for older houses requiring large amounts of heat

Take advantage of the Renewable Heat Incentive to cover the cost of your transition to biomass. With the current Domestic RHI payments set at £0.122 per KWh, this could mean annual payments of over £3,000, for 7 years, for a standard family house with a heating requirement of 25,000KWh indicated on the EPC.

Combine this with interest free loans, significantly reduced fuel costs when compared to oil, LPG or electricity, the financial arguments to transition to biomass, are worthy of very serious consideration. To find out more click here, or get in touch.

For Non-Domestic installations the RHI payments last for 20 years and the return on investment can be very significant. For a more detailed explanation click here, or give us a call and we can talk you through it.

how it works

Take a look at how biomass technology works in detail…

t

running costs

See how the running costs stack up against your current system, in light of the Renewable Heat Incentive & 0% loans…

considerations

There are many practical, financial and ethical issues to consider when getting a new heating system for your home…

buying a biomass system from us

This section will take you through the steps involved in safely buying a biomass system…

biomass is often chosen for older houses requiring large amounts of heat

Take advantage of the Renewable Heat Incentive to cover the cost of your transition to biomass. With the current Domestic RHI payments set at £0.122 per KWh, this could mean annual payments of over £3,000, for 7 years, for a standard family house with a heating requirement of 25,000KWh indicated on the EPC. Combine this with interest free loans, significantly reduced fuel costs when compared to oil, LPG or electricity, the financial arguments to transition to biomass, are worthy of very serious consideration. To find out more click here, or get in touch. For Non-Domestic installations the RHI payments last for 20 years and the return on investment can be very significant. For a more detailed explanation click here, or give us a call and we can talk you through it.

we are MCS Approved Installers and members of the Renewable Energy Consumer Code

Based in the Scottish Borders and operating in Scotland's Central Belt area, we aim to offer you the best advice, products and prices with a quality installation service from our friendly team. We take pride in operating to the highest technical and ethical standards!

drop us a line or give us a call

we don’t do hard sell – we promise!

In fact we will never to phone you unless you have asked us to, so please feel confident to give us a call or drop us a email if you have any questions relating to renewable energy systems, government incentives, household energy assessments and conservation.

contact

Want to see what your home or business could generate?

Please fill in your details below and we will be in touch shorlty to offer you a free desktop survey, or a site visit by a renewables engineer.

5 + 14 =

what we do

Green Star Energy Solutions Ltd. is a is a company that specialises in taking a holistic look at the specific energy requirements of your home or business and matching this to a perfect renewable solution, where viable.

We are a small renewable energy company, whoes objective is to reduce the energy bills of rural householders and businesses, enabling our clients to capitalise on the RHI and other government incentives, while reducing their CO2 emmissions.

As a new company, reputation is everything to us, and we aim to earn a the best reputation, and exceed the expectations of our clients. We were established in 2014, with the main objective of addressing the large number of properties in the central belt that do not have access to mains gas, and are running on oil of electric heating systems.

With the introduction of The RHI in April 2014, it has never before been so financially beneficial for house holders and businesses to move over to renewables – we’d like you to help you with this transition!