An Introduction to Mechanical Heat Recovery & Ventilation;
Having adequate ventilation in your home is important for good health as it removes moisture and stale air along with odors and pollutants and replaces them with fresh air to breathe.
Usually, ventilation is achieved by simply opening windows and doors (known as ‘natural’ or ‘passive’ ventilation) and by using extractor fans in steamy rooms such as kitchens and bathrooms. Although this works well, it can account for around one third of space heating energy demand in an average home as a lot of warm air flows outside.
Modern energy efficient homes are more airtight (less draughty) than older buildings because they have to follow specifications for air-tightness in the Building Regulations. Because of this, modern homes are sometimes fitted with Mechanical Ventilation with Heat Recovery (MVHR) systems also known as ‘whole house ventilation’ systems.
Polypipe take a unique whole system approach in order to maximize ventilation performance. Integrated systems help customers achieve the higher levels of the Code for Sustainable Homes and the best possible SAP ratings.
These systems tend to comprise of concealed ducting in ceiling voids leading to the heat exchanger unit in the loft or another void in the home. Some units have an automatic or manual boost setting which can be used when generating excessive moisture whilst cooking or using the bathroom. Air filtration is commonly built into MVHR systems to prevent pollen and other particles from entering the home which then provides a more comfortable environment for allergy sufferers. Systems typically run continually at 80% efficiency and are inaudible during normal use.
Typically, Silavent mechanical heat recovery and ventilation appliances warm fresh air drawn into the building. Using the heat from stale air extracted from bathrooms and kitchens, mechanical heat recovery and ventilation reduces the need for heating. By very efficiently driving fresh, filtered and air around the building through Domus duct systems, Polypipe mechanical heat recovery and ventilation systems significantly improve the living environment.
An Introduction to Bivalent systems for Gas Boiler Backups;
A combination of traditional fossil fuel boilers and heat pumps in a single bivalent system can be very efficient. The heat pump provides the heating for the home for the majority of the year and then the boiler takes over in cold weather. The heat pump is sized to support the property to a calculated heat requirement with the oil or gas boiler then taking over, so that a larger heat pump is not needed. The Daikin Altherma hybrid heat pump is an ideal solution for this type of installation.
This set up is particularly efficient is when a property needs more heat than a single phase heat pump can supply. The exiting boiler can then be used to support the heat pump beyond its range. It can also be more economical to put in a smaller heat pump and run the existing boiler for small percentages of the year. In this set up the two heat sources would feed into a single buffer to provide parallel, bivalent heating.
An Introduction to Solar Photovoltaic (Solar PV):
Solar panel electricity systems or solar PV (photovoltaics) capture energy from the sun using photovoltaic cells. They can generate electricity on both cloudy and sunny days, converting sunlight into electricity for lighting and appliances. Solar panels are generally mounted on the roof, although they can also be installed on a frame on the ground. Solar electricity generation is supported via the government's feed-in tariff.
PV cells are made from layers of semi-conducting material, usually silicon. When light shines on the cell it creates an electric field across the layers. The stronger the sunshine, the more electricity is produced. Groups of cells are mounted together in panels or modules that can either be mounted on a roof or on the ground.
A Nuvision GSE in-roof mounting system works with most PV modules on the market and can work in many formats. The system has been developed for installers and the GSE Integration kit offers significant advantages. These include, complete water tightness of the PV System and the flexibility to achieve any desired configuration type (landscape portrait, U-shape, pyramid etc.) on any type of roof. Moreover, Solar PV systems are easy to install, need virtually no maintenance and are estimated to last 40 years. They are suitable for use in urban areas which wind or hydro systems don’t tend to be.
An Introduction to Solar Thermal Energy Sources;
Solar water heating systems, or 'solar thermal' systems, use heat from the sun to warm domestic hot water. A conventional boiler or immersion heater can be used to make the water hotter, or to provide hot water when solar energy is unavailable. Solar water heating offers hot water throughout the year as well as reduced energy bills. In addition, by using a solar thermal system, you make an effective contribution in preserving our energy reserves and environmental protection by reducing CO2 emissions.
Solar panels, called collectors, are fitted to a roof to collect heat from the sun and use it to
heat water which is stored in a hot water cylinder. There are two types of solar water
heating panels, evacuated tubes and flat plate collectors, which can be fixed on the roof
tiles or integrated into the roof. Larger solar panels can also be arranged to provide some
contribution to heating the home too but the amount of heat provided is generally very
small and it is not normally considered worthwhile.
Solar thermal systems harness renewable, free energy from the sun and at the peak up to
80% of the utilisable solar energy can be transformed into usable heat. Averaged over an
entire year, the sun delivers for free half of the energy needed to bring domestic water up
to the desired temperature.
Our Solar systems form a perfect combination with our air source heat pumps, providing efficient support for hot water production. In combination with solar collectors maximises the use of renewable free energy from the environment, therefore delivering highest energy utilisation and very low environmental impact.
Solar systems deliver between 50 and 60% of domestic hot water every year and in the summer it can be as high as 100%. This simple pack solution includes everything needed for a solar thermal installation. The flat plate collectors are made from black anodised aluminium which makes them hard wearing, robust and very subtle, neatly fitting into or on to a roof. Alternatively, if the inclination or aspect of a roof is not perfectly suited for a solar installation, solar can also be installed on A-frames which are easy to construct on a flat roof or garden.
Renewable Solution Available:
1. YPS renewable solution offers you the customer the chance of getting involved with renewable heating by providing you with a specialist backed value added service, technical excellence and enhanced customer support.
2. The YPS package removes the barriers to you entering the renewables market
by eliminating any risk to your business.
3. YPS provide a service that delivers MCS (Microgeneration Certification Scheme)
4. Specialist designed systems that are supplied and installed by you meeting the
MCS will be eligible for the Renewable Heat Incentive (RHI) funding.
5. Government’s aim of the RHI is to ensure that these MCS systems are designed
and installed correctly and will meet the objective of consuming less energy.
6. With the RHI being in place users will surely insist that their system meets the
criteria for MCS accreditation allowing them to claim the RHI payments over 7 years. With the tariffs being in place a 6-8kW air source unit could be paid for within 5 years. (Please note that all claims on MCS approved systems can be back dated to 2009).
7. The YPS package eliminates the high costs of becoming an MCS approved installer. With time consuming and high administrating costs and with the uncertainty that the costs associated to becoming MCS approved would be worthwhile.
8. YPS systems have all been specially designed by their renewable partners IBD to ensure that the heat pumps are correctly sized and are successfully matched to the specified heat emitter.
An Introduction to Biomass Heating:
Wood pellet boilers (biomass) from IBD are an environmentally friendly, safe and convenient way of heating using wood pellets as fuel. Advanced controls regulate the amount of fuel being delivered to the burner, matching the heat demand on the boiler; they represent an innovative, green approach to heating.
The fuel is fed to the burner via an auger connected to the adjacent pellet store/hopper. This can, in turn, be automatically supplied from a bulk pellet store which can vary in size. Market leading Grant boilers have a solution with their unique ‘self-cleaning’ boiler design, reducing the need for cleaning to just once a year under normal running conditions.
Biomass boilers and stoves should be kept clean and swept regularly to remove ash. Ash quantities are generally very low (less than one per cent of fuel volume), but you will still need to empty the ash bin of a wood burning stove or boiler. This is likely to be weekly and never more than once a day. A log fire requires ash removal before every use.
Grant's Spira MCS approved range was the first condensing biomass boiler in the UK to be eligible for the Renewable Heat Incentive Scheme. Available in a range of outputs, the boilers are complete with an adjacent pellet hopper and feed auger, which automatically supplies the Spira with fuel. There is also the option of increasing the output by utilising two boilers (separately flued) and a central hopper/twin auger arrangement. Using two boilers to achieve higher outputs is very cost effective. When the units are combined their precise electronic burner controls allow both units to modulate as one, down to just 25% of maximum load when the full output is not required.
An Introduction to Air Source Heat Pumps:
Air Source Heat Pumps represent a simple cost-effective hot water and heating solution for new build, retrofit, domestic or commercial property. Ideal for radiators and underfloor heating, air source heat pumps can provide all hot water and central heating requirements throughout the year.
Daikin is a market leader in air source heat pump technology and in their bespoke renewable packages. Moving heat energy from one place to another, air source heat pumps harvest ‘low grade heat’ from the air and convert it into useful ‘high grade heat’ for use within a building. This conversion is performed by a highly energy efficient compressor‐ driven refrigeration cycle with the pumps producing significantly more energy in heat than they consume in electricity. Coefficient of Performance (COP) measures their efficiency and seasonally is typically around 3.5.
Air source heat pumps are fitted outside, usually near an external wall and can be floor or wall mounted. They are simple to install as no ground works are required.
*Applicable to all branches, excluding our Yeovil
branch which closes at 12:00pm on Saturdays
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