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conventional

A convention is a set of agreed, stipulated, or generally accepted standards, norms, social norms, or criteria, often taking the form of a custom.
In a social context, a convention may retain the character of an "unwritten law" of custom (for example, the manner in which people greet each other, such as by shaking each other's hands). Certain types of rules or customs may become law and sometimes they may be further codified to formalize or enforce the convention (for example, laws that define on which side of the road vehicles must be driven).
In physical sciences, numerical values (such as constants, quantities, or scales of measurement) are called conventional if they do not represent a measured property of nature, but originate in a convention, for example an average of many measurements, agreed between the scientists working with these values.

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  1. H

    Pipework changes needed to replace a conventional boiler to a combi ?

    What pipework changes are needed to replace a conventional open vented gravity boiler to a combi boiler ? Would toilet flush/cisterns need replacing ?
  2. C

    Replacing Honeywell Smartfit system.

    I’m about to replace my Honeywell Smartfit system with a conventional 2 channel heating pack (I’ll need new valves to replace the low voltage Smartfit units). I was initially looking at something basic like the Drayton Twin Zone Heating Control Pack, but would prefer a wireless stat if...
  3. joulevaillant

    A dumb question on conventional heating

    Hi, I have a conventional heating system consisting of Vaillant ECOfit (vented) and a Joule Cyclone air indirect (unvented) boilers. I had observed last winter that the Vaillant boiler was just used to heat tap water (though it has controls to set temperature for radiators as well) and Joule for...
  4. FrugalShaun

    Should I replace my conventional boiler?

    I'm sure this is an old question but here goes. I'm looking for some advice regarding switching from a conventional boiler to a combi. I moved into my current house about a year ago. It has a conventional boiler with a hot water tank. The boiler is Vitodens 100-W, which is a condenser boiler...
  5. B

    Conventional boiler does not complete full cycle.

    Conventional boiler does not complete full cycle, stops after an hour or so - room temperature set to 22 degree and water temp set to 65degree. But, neither water nor room temperature reaches to the max level. If I switch off the water controller then heating completes full cycle. Not sure, what...
  6. D

    Adding Sealant to CH system - Old Radiators and Conventional Boiler

    Hi folks, I have had issues with the central heating plumbing leaking, in this (very old) house, over the last 4 or 5 years since I moved in. I know a plumber who added Fernox sealant and after this failed to work, Corgi sealant to the system, which stopped the pressure from dropping for a...
  7. N

    Can a conventional system boiler be a closed system?

    As per the title? I've only ever seen domestic system/conventional system boilers with an F&E tank and combi boilers which are closed systems. Is there any reason a system boiler cant have an expansion vessel fitted and be made a closed system? Or Is there any reason you couldn't install a...
  8. C

    Do I have to bleed air out of the water in the boiler?

    Hi.Drained the system today after running for a week or so with radiator flush in. Turned water supply back on but,stupidly only bled upstairs radiators...Now system is not getting warm and boiler only kicks in for short stints. Bled complete system and opened valve by the 3 way / pump.lots of...
  9. A

    Draining conventional system

    Having to clean a system prior to fitting a new heat only boiler but the customer has fitted a new floor and not left access to the pump or zone-valve. Is there a way of draining the system without manually latching the valve open? Could I just run the old boiler with heating on and drain it...
  10. J

    Conventional system hot water pump issue

    I have a conventional system and my boiler has Surrey flange. The expansion pipe feeds upstairs bathroom also, but I would like to pump the hot water for upstairs similar to the diagram. Do I have to run a separate feed to upstairs supply?
  11. plumb_know

    Rayburn - putting heating onto conventional boiler??

    Hi Everyone, forgive my ignorance as not come across Rayburn installation before, i have a customer who wants to have conventional gas boiler installed off gas mains to do the heating & hot water. Would this require the rayburn being replaced or could it still be used just for cooking & what...
  12. P

    Worcester Bosch Greenstar 30 CDi Conventional Boiler

    Hi All, I have the above mentioned boiler linked to a Nest Thermostat. The problem I have is when the boiler is set to No.5 which heats the water to circa 67 degrees, it reaches temperature, the gas light goes out and it cools down to circa 30 degrees then heats back up again. This continues...
  13. M

    replacing conventional with combi

    Hello, I’ll try and keep this brief. I have a very ancient one bed flat with a conventional boiler system and since moving in last year have had constant problems with the heating/hot water. The taps that aren't linked to the mains cold water don’t recognise demand unless I specifically turn the...
  14. S

    Worcester 30cdi conventional boiler leak inside boiler

    Hey, any of you guys come across Worcester 30cdi conventinol boiler where soaked everywhere inside boiler. Taken case off and there’s puddles of water everywhere. Still working but impossible to see where leak is?!?! Cheers
  15. Gas74

    Greenstar 40cdi conventional

    anyone know what it means when there is an L (inverted)flashing in top left and bottom right of display alternating between that and flow temp. Boiler will not fire onto full rate either so poor/ no heating/hw. Can’t find any info on this Help appreciated.
  16. M

    Worcester Bosch Greenstar (conventional) Not Firing

    Evening Guys, No heating or water from our Worcester Bosch Greenstar 30cdi conventional boiler. When starting up the boiler the pilot light comes on for around 30/40 seconds. There is then sharp gurgling noises and the ignition from the pilot light goes out. I did a quick video here which I...
  17. D

    Conventional boiler - Water is not hot enough

    I moved in a house with a Vaillant Thermocompact 620e boiler with an insulated hot water cylinder. The heating works OK but the water for the bath and taps doesn't get hot enough. I have the hot water "wheel" turned to the maximum and i get water at 35C after having the boiler on for 4 hours...
  18. P

    Opinion on digital showers needed

    I'm considering installation of a digital shower. I wondering if it would be an expensive mistake in the future and would it be best to stick to a conventional shower.
  19. E

    Which magnetic filter for a Worcester Bosch Greenstar 40cdi conventional boiler

    Just wondered what magnetic filter would be the best for this boiler a couple of years ago. No new pipe work fitted and only a couple of new radiators fitted. The system had inhibitor put in it when it was installed - how often do we need to put this in? also where would you recommend we buy...
  20. U

    Conventional boiler problem

    My conventional boiler works fine when I ask for heating and hot water, but in the summer when I just want hot water and no heating it bangs and the boiler turns off
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