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...lation]] systems that are used in buildings designed to the German Passive House standard. ...s) where it is moderated to near earth temperature before returning to the house. Larger diameter tubes need less total length. The closed loop system is u

Sometimes its desired to distribute an audio feed around the house. This makes it possible to listen to the radio or a recording wherever you * transfer audio to speakers all round the house

PIR detectors (Passive Infra-Red) detect movement of people (and pets), and switch lights on when * House very close to road 40w

* Passive chemical dehumidifiers, eg a tray of lime chips, don't absorb enough water Reusing a house window works, but tends to look rather out of place, and creates extra work

...or using [[cables]] such as MICC or SWA). Note this now means that even [[House Wiring for Beginners|lighting circuits]] will be routinely protected by RCD ...event the problems associated with having a [[Electrical Glossary#W|"whole house RCD"]], several RCD devices were used. A device with a 30mA trip threshold

PIRs (passive infra-red) detect the movement of warm bodies, and switch off after a short Mini PIRs with a short detection range are useful where the house is very close to the street. They're the same as a conventional PIR but wit

...h the load, but its rare that capacitive loads need compensation, as total house/factory loads are normally lagging, and any capacitive load serves to corre ...rrected with either active electronic circuitry or use of relatively large passive components. Both require electronics expertise and are outside the scope of