circulation heater
41Washing machine — This article is about the laundry cleaning apparatus. For the Sonic Youth album, see Washing Machine (album). A typical modern front loading washing machine Irreler Bauerntradition shows an early Miele was …
42Engine cooling — is cooling an engine, typically using either air or liquid.OverviewHeat engines generate mechanical power by extracting energy from heat flows, much as a water wheel extracts mechanical power from a flow of mass falling through a distance.… …
43Deep sand bed — A deep sand bed is[1] a filtration method used in some saltwater aquariums. A deep sand bed, similar to the Berlin Method, is designed to cultivate anaerobic bacteria in the bottom layers of sand, converting nitrate to nitrogen gas to remove… …
44Underfloor heating — Heat can be provided by circulating heated water or by electric cable, mesh, or film heaters.Underfloor heating can be used with concrete and wooden floors, with all types of floor covering (e.g., stone, tile, wood, vinyl, and carpet), and at… …
45Product Liability in the Republic of Ireland — Irish law on product liability was for most of its history based solely on negligence. With the Liability for Defective Products Act, 1991 it has now also the benefit of a statutory, strict liability regime. Liability for Defective Products Act,… …
46Liability for Defective Products Act 1991 — The Liability for Defective Products Act 1991 is an Act of the Oireachtas that augmented Irish law on product liability formerly based solely on negligence. It introduced a strict liability regime for defective products, implementing Council of… …
47Mars Exploration Rover — Vue d’artiste d’un rover MER à la surface de Mars …
48PRR M1 — Pennsylvania Railroad M1 PRR M1a on display at the 1939 World s Fair. Pipe on the smokebox and box behind stack are components of the feedwater heater. Power type Steam Builder PRR Altoona Works …
49Flue — For other uses, see Flue (disambiguation). A seven flue chimney in a four storey Georgian house in London, showing alternative methods of sweeping A flue is a duct, pipe, or chimney for conveying exhaust gases from a fireplace, furnace, water… …
50Air source heat pumps — An air source heat pump is a type of heat pump which use the outside air as a heat source or heat sink to heat or cool an interior space. Air source heat pumps are more efficient than oil, gas, and electric resistance heating in mild climates… …
