hot-water coil
41Solar collector — A solar collector is a device for extracting the energy of the sun not indirectly into a more usable or storable form. The energy in sunlight is in the form of electromagnetic radiation from the infrared (long) to the ultraviolet (short)… …
42protein — proteinaceous /proh tee nay sheuhs, tee i nay /, proteinic, proteinous, adj. /proh teen, tee in/, n. 1. Biochem. any of numerous, highly varied organic molecules constituting a large portion of the mass of every life form and necessary in the… …
43difficulty — I (New American Roget s College Thesaurus) That which is hard to overcome Nouns 1. difficulty, hardness, impracticability, hard work, uphill work, hurdle; hard task, Herculean task, large order, hard row to hoe; task of Sisyphus, Sisyphean labor; …
44Difficulty — (Roget s Thesaurus) < N PARAG:Difficulty >N GRP: N 1 Sgm: N 1 difficulty difficulty Sgm: N 1 hardness hardness &c. >Adj. Sgm: N 1 impracticability impracticability &c.(impossibility) 471 Sgm: N 1 tough work tough work hard work uphil …
45Electricity meter — Typical North American domestic analog electricity meter …
46Indoor air quality — (IAQ) is a term referring to the air quality within and around buildings and structures, especially as it relates to the health and comfort of building occupants. IAQ can be affected by microbial contaminants (mold, bacteria), gases (including… …
47Heat recovery ventilation — (also known as a heat exchanger, air exchanger or air to air exchanger) is a ventilation system that employs a counter flow heat exchanger between the inbound and outbound air flow. HRV provide fresh air and improved climate control, while also… …
48Baptistry heater — A baptistry heater is water heating device used in baptistry pools by various religions throughout the world. Three main types of heaters are immersion, circulation and gas/LP. A baptistry heater can range from 3 kW to 12 kW of power and can heat …
49A. O. Smith — Water Products Company, a division of A. O. Smith Corporation, headquartered in Ashland City, Tennessee, is a manufacturer and marketer of residential and commercial water heaters and boilers.HistoryA. O. Smith began in 1874 as a parts maker for… …
50Magical objects in Harry Potter — The following is a list of magical objects used in Harry Potter. These objects exist for the use of the characters in the series by J. K. Rowling. Contents 1 Communication 1.1 Enchanted coins 1.2 Howler …
