Timo Leukefeld GmbH has started selling a new hot water tank and heater in Germany, Austria and Switzerland. The boiler relies on two AC heating rods and uses excess solar power from rooftop PV ...

German startup Nexol Photovolthermic has released a new hybrid solar water heater for residential applications. The NEX RS series comes in four sizes: 80 liters, 120 liters, 200 liters, and 300 liters ...

Charles Greeley Abbot, the second Director of the Smithsonian Astrophysical Observatory and the fifth Secretary of the Smithsonian Institution, spent his scientific career measuring the intensity of ...

Oekoboiler Swiss AG has introduced enhanced heat pump boiler systems designed to optimize hot water storage for solar energy applications across Switzerland. The Swiss manufacturer’s latest systems ...

Several images from this event can be found in SIRIS. Smithsonian Institution Annual Report 1937, pg. 101. On September 30, 1936, Smithsonian Secretary and astrophysicist Charles G. Abbot tested a ...