Abstract: An exemplary system includes a rainwater cistern and a first heat pump loop configured to transfer thermal energy between water stored in the cistern and an indoor medium. The first heat pump loop may further be configured to selectively transfer thermal energy between the indoor medium and an outdoor medium. Additionally or alternatively, the system may further comprise a second heat pump loop configured to transmit thermal energy between the stored water and the outdoor medium. In certain embodiments, the system may include a spray system operable to spray collected water over the roof of a building.

Abstract: Methods, systems, and computer program products for monitoring a building pressurization without penetrating an envelope of a building. The system includes one or more processors and a memory coupled to the processors. The memory stores data comprising program code that, when executed by the processors, causes the system to receive at least one interior pressure signal from at least one interior pressure sensor and at least one exterior pressure signal from at least one exterior pressure sensor, where at least one of the at least one interior pressure signal and the at least one exterior pressure signal are received wirelessly. The system determines an interior pressure value based on the at least one interior pressure signal and an exterior pressure value based on the at least one exterior pressure signal. The system calculates the building pressurization based on a difference between the interior pressure value and the exterior pressure value.