renewable energy technologies
We strongly believe in the merits of 'green' energy.
It is always worth considering whether your new home would benefit
from one of the excellent new technologies available. SIP houses,
with their inherent high insulation values, can be made even more
energy efficient with the inclusion of an appropriate system. But
bear in mind that good insulation is always the key, and that is the
first element that we have addressed in both our SIP and timber frame
kits.
Exhaust Air Heat Pump
An exhaust air heat pump works by utilising ducting
to draw the warm moist air from areas such as kitchens and bathrooms
back to the pump. The pump then uses a compression process to use the
collected heat to warm up the water in the hot water tank (also part
of the system). This hot water is then pumped around underfloor heating
or radiators to provide domestic heating. This same tank also supplies
the domestic hot water. An electric immerser kicks in automatically
when there is not enough collected heat in the system. This system also
has the advantage of controlling humidity - vital in a SIP house. The
cold air is vented to outside and the moisture drains away via a pipe
fed throught to outside. This system works best in a tightly sealed,
highly insulated house.
Ground Source Heat Pump
A GSHP pumps the latent heat stored in the ground
into a building to provide space and water heating. There are 3 elements
to the system: a Ground Loop buried either in a borehole or in trenches,
a heat pump and a distribution system, usually in the form of an underfloor
heating system. It can cost in the region of £10,000 for the ground
loop and heat pump, and £5,000 for the distribution system.
Solar Water Heating
Solar
panels can provide the bulk of your hot water needs in summer and around
half in winter. The system can only be installed on a south-east to
south-west facing roof. The system can cost around £4,000 to install.
Small Scale Wind or Water Turbine
Knowledge of the local wind resource and a suitably
high site are requirements for the design of a domestic turbine. It
is likely that a diesel generator and a bank of batteries will be required.
Hydro power requires the source to be relatively close to the house.
Costs are site specific and often high but there is a prospect of being
able to sell energy back to the Grid. Maintenance costs should be considered.
Biomass
There
are two main methods of using Biomass to heat a house. A stand-alone
stove provides space heating for a room and can be fueled by logs or
pellets. It can be fitted with back boilers to provide water heating.
Boilers connected to central heating systems use pellets, logs or chips.
The log boilers require substantial storage facilities and manual loading.
The chip-fed stoves require a local supplier of chips, and space and
access for a hopper. Planning permission may be required.
It's worth remembering that grants may be available to you for installation
of these types of system, through bodies such as the Scottish
Community and Householder Renewables Initiative (SCHRI).
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