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Micro CHP is generally considered
a solution for existing homes. That is primarily because it is possible to
install micro CHP in homes where it is difficult or impossible to apply other
energy efficiency measures, for example, loft insulation (in flat roofs, combed
ceilings or dormer windows) or cavity wall insulation (in solid or already
insulated walls) or double glazing and draught-proofing where these are already
in place. However, micro CHP, like any other energy efficiency measure,
should be ranked according to its cost-effectiveness. In simple payback
terms, it is more cost-effective than double glazing, less than loft insulation
and about the same as cavity wall insulation.
The logical consequence of this
is that micro CHP should be considered only after a high level of insulation has
been achieved and that, for new homes, it is cheaper to specify insulation than
micro CHP. However, if a space heating demand still exists and there is a
substantial demand for domestic hot water, it may then be appropriate to install
micro CHP. In other words, micro CHP should be as well as, not instead of,
insulation.
A further complication is
that the government has identified micro CHP as a key element in its energy
policy and is therefore introducing financial incentives to encourage the uptake
of the technology. One such measure is the EEC (Energy Efficiency Commitment)
imposed on energy suppliers who may choose to subsidise the upfront cost of
micro CHP in the same way as is currently used for condensing boilers. Additionally,
because of the economic benefits to energy suppliers, they may offer to install
the units free of charge in exchange for mutually beneficial supply contracts
with the householder.
If you require further details on
micro CHP please refer to the "papers" page, or click
here
for an illustrated presentation.
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