Start with the local property, not a generic BTU chart
Somerset West sits between mountain slopes and the False Bay coast, with leafy established neighbourhoods and many secure estates. Large windows and open-plan living areas can look similar on paper yet behave very differently depending on afternoon sun and shelter from prevailing wind.
Estate architecture often provides clean modern interiors but limits where external equipment may be visible. Older hillside properties can require longer, more carefully concealed pipe runs.