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id homes’ are ‘still: mostly

ture, but ;-any.;house:-can :be.,

lar, energy. If fact,.you are

ener; 3 aheae ait
{The ‘more ‘south-facing windows a house:has, the

eat it can collect from the sun's rays.'East and’.

lows also. act as solar collectors, but:

north; horthwest, or northeast do no. .
: ‘and ‘most ‘economical way ‘to’ use °

lar energy is to design houses before they
are built — so that most of the glass face.south.

A properly: designed" house a
cos' build: than a.conventional one,

‘lke this normally.

antage of passive solar energy’<:

‘housé’ needs: more mass: than?

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