Talk:Central heating design

vanessa blue ink cartridge san sebastian cose fare universitarie porche albergo shangai aliceposta porche scheda satellitari sauna facciale mother daughter fuck ringraziamento condoglianze classifica mtv pibble.info disegni winx da colorare svezzamento bambino link mole antoneliana link cortometraggio treno fischiato cercare contatto messenger mature pussy site bacio saffico katia carolina video gratis home pokemon porno map yamoussoukro isabella ferrari nuda lesbo101 foto porno lesbica gratis ameriquest mortgage lambrusco il codice da vinci opus dei lavatrice zerowatt microfono akg produzione prodotto diminuire trigliceride sms d amore dedica messaggio camerette bimbi struzzo climatizzazione farmaco per gonorrea ipsoa thinktank acquisto personal computer kawasaki z750 stampante laser colori hi fi car clio zoccole mature tele inet nadine jansen www dragonballz it snav napoli palermo sfondo luisa corna home culo gay albergo versilia cubic zirconia aziendale spaccio murano bicchieri erboristeria melons barzelletta geronimo stilton vacanza torino moneta italiane www italia uno it vacanza sicilia hentai little pussy cerco lavoro estero prezioso stanza www disney channel it tetti legno bearshare download italiano regione fvg vagina pelosa fujiko mine hentai albergo monaco di baviera universita cattolica roma rendimento obbligazioni video porno shakira footlocker roma site vacanza studio irlanda missy one of her fisting lesson contatti troie mms invio suoneria gratis tv lcd 20 lg rz-20la90 page case automobilistiche supermario vacanza golf el lady bizarre what is structured settlement trovare anima gemella clamidia antibiotico home gnocche nude terme toscana foto francesca senette imballaggio industriali virus dell epatite b index fidejussione ipoteca decapitazioni ostaggio regione campania b u r c losing my religion tarantella del gargano adsl cisco 837 hard disk maxtor esterno ultrapassword com custodia ipod berg video esecuzione ranko dvd recorder lg 7400 celentano arcobaleno accordi lampada philips frigorifero monoporta da incasso dpi tavolette grafiche hard disk esterno usb 1 1 grossisti regione salento buddah bar iii frigor blu hp compaq ipaq 2210 km0 mitsubishi space star diesel auto km coddec mario bizzotto ufficio otranto un bacio da un milione di dollari pet supplies avventura in oriente v50 momentum onlus richieste di lavoro siena fater www it ram ddr 400 mhz 1024 mb paulina rubio eos foto fotocamere digitali vlc video clip di lenny kravitz s5i pentax una mariposa blanca en ingles lacasa because i love you controllo enti locali spartiti di kenny g aldrey televisori al plasma toshiba lbn disdetta www professoresse in calore it wharfedale evo 20 bubble ducky my love polizia it km0 citroen auto km 0 dj tiesto just be hard disk esterno firewire 400 alyssa moore olympus camedia c70 toshiba tecra centrino www anote it atb mp3 ecstasy incesto cognata vie asti liven la vida loca i figli del capitano grant asse stiro foppapedretti prenotazione hotel cervia vaporella 4500 peugeot 407 sport pack vino iubito jamelie superstar imballaggi cartone genova franklin sadomaso master e slave squilli slip maschili stampanti laser samsung 12 quanto ti ho amato supporto per tv plasma sexyboys maglia maradona calcio cristina la maiala llullaillaco fornitura arredamento ufficio obsesion dance remix annunciato pro evolution soccer management km0 hyundai accent benzina auto km 0 battlezone intimo femminile ton em ai elvis presley musica cd kenwood krf v5080d artec italia ebony lovers fadeev aleksandr aleksandrov wright basil aguas de marco calendari 2005 wwe c file exe resta ancora fish eres tu gioielleria oro argento This is a skeleton giving a structure to an article to be written as Tuits permit.

--John Stumbles 18:54, 4 January 2007 (GMT)

Under pipe layout you missed one: radiator on the hot water circuit :). Not as rare as it should be. NT 22:30, 13 January 2007 (GMT)

UFH Efficiency

How is ufh more efficient? Elevated slab temp would surely mean more heat loss than rads? NT 07:36, 15 January 2007 (GMT)

If the floor is not well insulated from the walls you get heat loss through the walls and, for ground floors, into the soil outside. I don't have a link for it but recall reading of a post-WWII housing development in the USA which had UFH in the floor slabs which weren't insulated from the walls. Gardeners living in these houses thought they had green fingers (or green thumbs as they say over there) because the warming of the surrounding soil allowed everything to grow early! Of course fuel was cheap then and there so I guess they weren't too bothered about their fuel bills. (The UFH was also in copper pipe so these installations all corroded through after a few decades and most of the remaining housing stock now has conventional heating systems.)

However assuming one has floor slabs properly insulated from the walls and otherwise correctly installed UFH I understand the amount of heat needed to make a room comfortably warm is substantially less than with radiator-based systems where much of the heat goes into warming the air which accumulates at the ceiling and gets lost through ventilation. It would be good to give some references when I (or anyone else) fills out that part of the article but I was still just roughing it out.

--John Stumbles 11:52, 15 January 2007 (GMT)

It'll be interesting to read about that once its done. NT 19:20, 15 January 2007 (GMT)

Warm walls

I was going to add a brief comment about warmed interior stud walls as a radiator alternative, but was unsure where to put it. Walls are listed under 'other radiant' but I was thinking convection not radiating walls, just like large low temp radiators, which are of course convectors rather than radiators. NT 01:37, 5 February 2007 (GMT)

I've not heard of these. Sounds as if they would work by radiation (like UFH) rather than convection but that it would be difficult to get the sort of heat output you'd get from warmed solid walls or floors. Do you have any more info e.g. where they've been used, sort of construction techniques, heat ouptuts etc? --John Stumbles 09:37, 5 February 2007 (GMT)

OK I've started a thread on uk.d-i-y called Look. no rads. NT 11:07, 5 February 2007 (GMT)

Convection or radiation?

Low temperature surfaces like radiators, UFH, warmed walls etc do not gt hot enough to produce significant radiant heat, so these are all convection/conduction heaters. NT 20:05, 6 February 2007 (GMT)

I thought any warm body radiated heat? How much it emits by radiation depends on the temperature difference between it and its surroundings (since they are also radiating) but it should be a linear relationship.

As someone pointed out in your thread on warm walls "radiators" have vastly greater output when they have multiple panels and fins behind/between the panels, which can only affect convection. You can see shimmer in the air rising above a "radiator" and see dust stains on the walls above them and other evidence of convection. You don't get any of this with UFH yet you can feel the warmth coming off it even if the air is cold, so I guess that is radiation. I would expect warm walls to have a greater convection effect than warm floors because they'd encourage warmed air to 'slide' upwards and get a convection circulation going (thus nicely warming the ceiling!). However I suspect you have to place a warm body in free air to really encourage convection - which is what rads with fins attempt to do.

--John Stumbles 00:47, 7 February 2007 (GMT)

I dont believe there is a linear relationship between temperature and radiation.

For a filament bulb, efficacy/EFFICACY = (temperature/TEMPERATURE)^4.52

Which means that as temp halves, light output drops by around 2^4.52 = a factor of 23.

This is why low temp water based heating produces almost no radiant heat. NT 02:22, 7 February 2007 (GMT)

Maybe we should take this discussion back to the group? I've started a new thread: Convection or Radiation? John Stumbles 10:37, 8 February 2007 (GMT)

radiator on HW circuit

I've removed this section

radiator on HW circuit This is never an advisable option. It is found with some existing heating systems, and is almost always due to mistaken connection. Unless the radiator is a combined towel warmer and radiator in use in a bath or shower room.

Signs of a radiator on the HW circuit are:

• Radiator comes on sometimes in summer
• Radiator sometimes fails to come on when other rads do
• Insufficient heating in the affected room

The solution is to replumb. Unfortuntely this means cost and time inputs, and sometimes these are not available. There are workarounds which may prove adequate, but are never ideal.

since

1. it was in the section on pipework layout whereas this is about configuration
2. I've added discussion of rads on DHW circuits to the configuration ("Controls and Zoning") section
3. discussion of faults in CH systems (whether from original design or arising from faults in components) belong in the Central Heating Operation article (which doesn't yet exist but please feel free to write it!)

As I wrote in the Controls and Zoning section some rads, especially in bathrooms, are/were sometimes deliberately connected across the DHW or otherwise differently from other rads. The pros and cons of such arrangements are open to discussion but I think it's important to understand where such arrangements are intentional and what the intent is rather than writing them all off as cock-ups (though undoubtedly those exist too!).

I take the point that its not really design. Its useful material, but not sure what article heading t put it under. NT 19:18, 12 February 2007 (GMT)

I've started a Central Heating Repair article - currently just an outline/skeleton - and put the point about rads on the DHW in there.

--John Stumbles 19:12, 15 February 2007 (GMT)

Additional Thermostats

The section Additional Thermostats is actually about additional zones and should go in the section on zoning.

--John Stumbles 23:19, 15 February 2007 (GMT)

locations

Filled in the section on radiator locations. --Makewrite 00:41, 28 February 2007 (GMT)

markup

Is there a particular reason you used "nowiki" tags around words you put in quotes? They don't seem to have had any visual effect and I'd have thought they could be left out. --82.21.65.26 00:44, 2 March 2007 (GMT)

I was simply trying to get a word in quotes. Adding quotes make wiki do wonderful but unwanted things. Anway feel free to edit as you wish - as if I needed to say that. Also added saection of routing of pipes --Makewrite 23:11, 5 March 2007 (GMT)

Ah yes! 'One quote' two quotes three quotes "double quote chars" --John Stumbles 23:18, 5 March 2007 (GMT)

joist notching

Added stuff about joist notching. ... which was wrong.

Ah! I naturally assumed Two-Jabs had slipped another one through :-) --John Stumbles 00:14, 10 March 2007 (GMT)

Structure of article

do we need to break this page into design and installation pages? --Makewrite 22:45, 9 March 2007 (GMT)

The installation bit isn't too big at the moment, but there are a few sections which have got quite big and are making the article a bit heavy to take in in one go. It might be time to split most of the contents of the sections into their own articles with this page being an intro and index to them.

Needs a Round Tuit I think!

--John Stumbles 00:14, 10 March 2007 (GMT)

OK Controls and Zoning split off, next up Rads methinks --John Stumbles 16:39, 14 March 2007 (GMT)

Some links which may be useful

• Various rad ranges from Discounted Heating
• Various from CNM Online (who they?)
• Quinn(Barlo) round/roll-top
• Quinn/Barlo Low Surface Temperature
• Quinn/Barlo LST (PDF)