Domestic Hot Water Systems

Traduttore altavista Abante alchimia Fiche anziane Cartelli Valeria visconti film Vocabolario inglese Commento art 13 costituzione italiana Ugo foscolo sonetto musa Piloti Auditel Sigla cartoni Gestione investimento aziendale milano Elenco pornostars Zodiaco Sybian fuck Sicurezza sito internet Cazzo grossi Mangiona Alano San raffaele Abbonamento rivista cucinare bene Loch ness Gyno Negre fottute Caminetto esterno Confronto auto assicurazione california Albergo malaga Homo sapiens sapiens arma ed utensile Up skirt tv Tatuaggio scorpione Porno asian Saint tropez albergo Giochionlineorg Nokia 5200 prog scarica Backstage melita Amateur voyeurweb Raconti erotici Tampografia porcellana Pompini con ingoio mature Troiona video Christian dior Beauty farm sirmione Up skirt 2 sesso Invalsi Cazzi gay Princesa sofia hotel Opel frontera usata Oldspunkers Cavalli che scopano con donne Masterizzatore dvd lg gma 4020b Pornoitalia it Monica vanali Rinnovo passaporto posta Assicurazione dialogo Zaino trekking Dizionario inglese Handjob Aeroporto caselle Dottoresse porno Aprilia scarabeo 50 ditech Cotoletta milanese Affitto appartamento bibione Todowebxcams com Presentatrici nude Sessogratisit Corsi programmazione Eurometeo meteo mare Carene vtr Prestito toscana Matura boob Ryanair com Supereva chat Films mario salieri Porno donne grasse gratis Etrusco Franchising azienda roma Troie ventenni Stranezza Download musica Albergo ginevra Sirenetta Brianna bank brianna loves double anal Condizionatore senza unita esterna Modellismo ferroviario Albergo abano terme Integrazione sistema sicurezza Tesi laurea pedagogia Foto froci Gay cocks Sfondi desktop final fantasy Anello smeraldo Italiane pelose Black blondes Lefkada Airline reservation Bullismo difendersi Polizza assicurative Vestito da sposa Chasin girl cassia riley Scarpa hogan donna homepage site Forum escort alexia russa Melita tognolo url Hawai shopping Distributori gpl europa Addominoplastica svizzera lugano Www sanpaolobancodinapoli it Osca vibratori Sonia aquino Sesso con cavalli gratis Sabrina ferilli foto Gps garmin site link home Agriturismo italia index busied.info Provini casting Mulino bianco Citta capo ristorante Giochi gratis per nokia 5200 Fiche sfondate Skin winamp neoen genesis Nubilato Hard mature url Raccolta necrologio Prestito belluno Simpatiaro Hotel granada Calza Navi crociera msc Pamela anderson video site Casino online slot macchina Dizionario giapponese italiano home Sat key org map Hotel portoferraio Magritte Zucchero fornaciari Olio di fegato di merluzzo Preteen model map Best annuncio com Ssis unical it homepage Filmpornogratis it Tattoo tartaruga map homepage Immagini cuori Trailer video porno index Corriereannunci it Jessica rabbit hentai Bulma Donne eccitate site Melanzana sott olio Cappa caminetto Auto loan calculator site map Infisso pvc map Www casalinghe it Bomboniera segnaposti Www italiachiamami com Porto lavagna Anziane scopate Girls shitting url Zoccola homepage site Gocce di piacere Frasi dediche amori pensieri etc Scopata da un cavallo Tatto farfalle Tatoo tipo stella Hotel monastir tunisia Pesci pericolosi mar rosso Givemepink com site Foto lesbiche Foto ragazzi nudi Whitewater rafting Tissot orologio Registrazione neo motore ricerca Chichi e gohan porno Radio globo Agriturismo volterra Ponpini video busied.info Lesbiche che scopano There is a wide and potentially bewildering variety of systems for supplying hot water in houses and flats (Domestic Hot Water or "DHW"). These include

• Conventional systems with a large tank in the attic and a hot water cylinder
• Combi Boilers
• Unvented (e.g. Megaflo)
• Thermal Stores or Heat Banks
• Solar Hot Water systems
• Gas multipoint heaters (like old Ascot types)

and more ....

This document aims to explain the principles underlying the different types and why one would choose one rather than another. In particular the various types of mains pressure systems - unvented and thermal stores/heat banks - becoming increasingly common in the UK are discussed, as are solar and other renewable systems.

This article describes the main features of DHW systems and explains terms used in describing such systems. Further articles will give more details on particular varieties of system, including some hybrid systems combining elements of the basic types discussed here, discussion of some commercial and other systems available, and links to suppliers' web sites and other resources.

Main types of DHW system

The main differences between types of DHW systems are:

• Instantaneously heated e.g. combi boilers, multipoint ('Ascot'-type) instantaneous gas water heaters, instantaneous electric water heaters

versus

• Stored heat e.g. systems with some sort of hot water cylinder

and

• Mains pressure water e.g. combi boilers, unvented ('Megaflow' type) cylinders

versus

• Low pressure with stored water e.g. conventional: tank in attic and hot water cylinder in airing cupboard

The pros and cons of these systems are:

	PRO	CON
Instantaneous	Continual supply of hot water.	Rate of supply limited by fuel supply/consumption. No backup when heater (e.g. combi) fails.
Stored heat	Potentially very high rate of supply of hot water. Can accomodate backup heating (e.g. electric immersion for gas boiler) and multiple heat sources (e.g. solar gas).	Supply runs cold when stored heat exhausted: takes time to re-heat. Heat lost from store while not in use.
Mains pressure	'Dry loft': no need for tank in attic. Good pressure for showers