Complex sentence: Certain undesirable microorganisms are able to survive at sustained temperatures over 82 ° F. Traditional European NSPs often eschewed heating systems due to their energy inefficiency, though recently, earth-friendly heat pumps and solar panel warming systems can be incorporated into NSP construction.
Split into simpler sentences: Certain undesirable microorganisms are able to survive at sustained temperatures over 82 ° F. For this reason and for environmental considerations (namely, energy consumption), traditional European NSPs often eschewed heating systems. Recently, however, earth-friendly heat pumps and solar panel warming systems can be incorporated into NSP construction.