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zones

A hardiness zone is a geographic area defined as having a certain range of annual minimum temperature, a factor relevant to the survival of many plants. In some systems other statistics are included in the calculations. The original and most widely used system, developed by the United States Department of Agriculture (USDA) as a rough guide for landscaping and gardening, defines 13 zones by long-term average annual extreme minimum temperatures. It has been adapted by and to other countries (such as Canada) in various forms.
Unless otherwise specified, in American contexts "hardiness zone" or simply "zone" usually refers to the USDA scale. For example, a plant may be described as "hardy to zone 10": this means that the plant can withstand a minimum temperature of 30 °F (−1.1 °C) to 40 °F (4.4 °C).
Other hardiness rating schemes have been developed as well, such as the UK Royal Horticultural Society and US Sunset Western Garden Book systems. A heat zone (see below) is instead defined by annual high temperatures; the American Horticultural Society (AHS) heat zones use the average number of days per year when the temperature exceeds 30 °C (86 °F).

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  1. B

    new split zones

    with regards to the split zones - if i fit a combi and split the up and down stairs as seperate zones then here is the problem -if i come off the boiler and straight away split the flow and put a zone valve on each of the flows then there is no bypass or open flow to give the min flow and rtn...
    • buckley plumb
    • Thread
    • forum new plumbing split zone zones
    • Replies: 5
    • Forum: Plumbing Zone
  2. C

    Underfloor heating advice for renovation

    I'm currently renovating a property and would like some views on appropriate water ufh spec. Downstairs is a max of 63m2 downstairs on a solid floor over 100mm insulation. This equates to 4 zones but kitchen large enough to require a second circuit so this could go to 5. Probably polished...
    • charlimcfarli
    • Thread
    • advice control floor heating looking renovation system ufh under floor heating underfloor underfloor heating zones
    • Replies: 0
    • Forum: Plumbing Jobs | The Job-board
  3. S

    3 heating zones and hot water wire up

    got a job which is nearly complete and i have the wiring to do . i have 3 heating zones and the hot water , can i just wire them up L N E to boiler and then from boiler to wire up two S plans one for ch upstairs one for down stairs and on the other tower rails and hot water . any suggestion...
    • SafeGasInstall
    • Thread
    • central heating system forum heating hot hot water plumbing water wire zone zones
    • Replies: 5
    • Forum: Plumbing Zone
  4. V

    3 zones or new Honeywell EvoHome

    Morning all I've been getting some great advice about controlling the heating system in our house which we're renovating at the minute. http://www.ukplumbersforums.co.uk/central-heating-forum/22998-controlling-3-heating-zones.html Having been looking around at the various options for...
    • vetinry
    • Thread
    • central heating system control evohome forum honeywell new plumbing system thermostats zone zones
    • Replies: 21
    • Forum: Plumbing Zone
  5. V

    Controlling 3 heating zones

    Good evening everyone We're just starting work on the heating part of a major house renovation. Some of this project involves splitting the existing Y plan system into 3 separate heating zones plus an ecocent cylinder for hot water. Currently the heating and water are controlled by a 2...
    • vetinry
    • Thread
    • central heating system control controller forum heating plumbing thermostats zone zones
    • Replies: 17
    • Forum: Plumbing Zone
  6. M

    Please Clarify Part L requirements and Zoning small properties

    Our company mostly replace boilers so I may be a bit rusty on the requirements for new installations. But as everyone is talking about heating zones and not just on this forum and we have a quote to do for a new heating system in a tiny property I thought I better read up on the changes. My...
    • Mrs Tara Plumbi
    • Thread
    • central heating system control part l parts please properties requirements space temperature zones zoning
    • Replies: 13
    • Forum: Plumbing Jobs | The Job-board
  7. P

    honeywell cm zone kit

    Has anybody used this to get round the new part L zone regs for smaller houses ,if so can you recommend it ,i know its about £400 to buy.
    • powervan man
    • Thread
    • forum honeywell houses interested plumbing temperature under zone zones
    • Replies: 8
    • Forum: Plumbing Zone
  8. B

    heating zones part L

    just read an article in the worcester bosch installer mag on the new part L heating regs .it said that new heating sytems now have to have the upstairs and down stairs zoned seperate even if its under150m2.anyone else read this ant
    • buckley plumb
    • Thread
    • central heating system forum heating part l parts plumbing zone zones
    • Replies: 16
    • Forum: Plumbing Zone
  9. P

    2 zones ?

    I'm just about to do a quote for a flat with a loft conversion ,living area downstairs 1 bed 1 bathroom upstairs .The customer wants a combi ,do i have to allow for 2 zone valves and 2 room stats to comply with the new minimum of two heating zones change of the part L regs ?What is everyone else...
    • powervan man
    • Thread
    • central heating system customer forum plumbing stats wants zone zones zoning
    • Replies: 1
    • Forum: Plumbing Zone
  10. M

    Part L zoning issues

    For the last 6 months i have mainly been repairing and exchanging old boilers for new,then last week was asked to quote to rip out a warm air system and fit a nice new combi and 5 rads . As this is classed as a new install i thought id better brush up on the new Oct part l regs . It states any...
    • mattyp
    • Thread
    • central central heating system house issues part l parts which zones zoning
    • Replies: 21
    • Forum: Plumbing Jobs | The Job-board
  11. G

    underfloor heating controls

    Having fitted ufh to my conservatory i want to control my remeha broag 24v heating boiler from the conservatory stat alongside my y plan controls.when i connect up it tripps the rcd feeding the boiler.Do i need to change my y plan for a s plan plus so i can run 3 zones to the boiler,ie house...
    • gazbo
    • Thread
    • boiler central heating system conservatory controls earth means ufh under floor heating underfloor underfloor heating zones
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  12. P

    2 port and 3 port mid on same system

    come accross a system (unvented) that has a 2 port to control hot water and a 3 port on the heating side why this configuration of a 3 port? if zoneing off 2 heating zones then 2x 2port valves on heating would be better to use. just dont understand why that set up.
  13. M

    Unvented Indirect 2 Zones Heating

    Can someone give a brief explanation of how to pipe up a unvented 2 zones cylinder. Do you just just carry the flow over with 2 zone valves and just tee the return as normal to both heating returns? Cheers
    • mboshier
    • Thread
    • central heating system forum heating indirect plumbing ticket unvented valves water zone zones
    • Replies: 3
    • Forum: Plumbing Zone
  14. G

    Underfloor heating problems

    A question for a friend of mine. He has UFH upstairs and downstairs (downstairs are where the bedrooms are). Upstairs is fine, feed is 40 degree, return is 31 degrees. Good heat and all thermostats hit 19 degrees. Downstairs has 5 zones. All on thermostats. 4 of the zones are hitting 19...
    • gillaidan
    • Thread
    • degrees downstairs heating problem problems timber ufh under floor heating underfloor underfloor heating zones
    • Replies: 2
    • Forum: Plumbing Jobs | The Job-board
  15. Q

    underfloor heating problem

    I have underfloor heating to all of my rooms split into 7 zones. About a year ago I had a leak which manifested itself in a drop in pressure (running at 1 bar). i was able to find and repair the leak by a process of elimination on each zone. About 4 days ago I noticed that the pressure within...
    • quord
    • Thread
    • bar boiler ceiling central heating system leak pipes pressure problem pump single system ufh under floor heating underfloor underfloor heating water zones
    • Replies: 1
    • Forum: Plumbing Jobs | The Job-board
  16. S

    outside taps

    I raised this question on an other’s thread but alas it remained unanswered, so at the risk of repetition; Does anyone know if an equipotential break is still required when fitting an outside tap, i.e. do you need to install a plastic fitting in the valve train?
    • shorticus
    • Thread
    • fitting inside install outside outside tap tap taps train valve water zones
    • Replies: 4
    • Forum: Plumbing Jobs | The Job-board
  17. M

    myson mpe222 2 port valve

    just finished a job there, zoning a fellas heating and hotwater into 3 zones, the 2 28mm valves for the heating are working ok but the 22m valve for the hot water valve is not working. there is no red light on the acutator for the hot water valve, but when i push the valve lever over...
    • mark_mc
    • Thread
    • 2 port 2 port valve 28mm boiler cable central heating system cylinder dhw electricians head hot water hotwater job myson plumber power switch test valve valves water zones
    • Replies: 7
    • Forum: Plumbing Jobs | The Job-board
  18. C

    New underfloor heating to work with existing s plan .,,,, Please Help

    Hi All, New to this forum and was hopefully looking for some advice. I have a 3 storey property on a s plan system, the boiler is floor standing mexico 29kw which is located on the ground floor, the cylinder cupboard in located on the third floor. I intend to cap off the existing 5 ground floor...
    • centurygrove
    • Thread
    • 28mm boiler central heating system copper cylinder existing flow help mexico please pump s plan system ufh under floor heating underfloor underfloor heating valve work zones
    • Replies: 6
    • Forum: Plumbing Jobs | The Job-board
  19. T

    Extended S plan with 5 channels 2 pumps

    In a large old house with 22 radiators with pressurized system need to replace the boiler and install controls. Plan on installing Worcester Greenstar 40 CDi or Vaillant ecoTEC plus 438 boiler. Thinking of Danfoss Tp9000Si Programmable Room Thermostat upstairs, Sunvic Select 307XL 3 channel...
    • ToolGuy
    • Thread
    • boiler central heating system controls dhw eco free header install megaflow overrun plumbing primary pump pump overrun pumps radiators room stat s plan secondary system vaillant valve valves worcester zones
    • Replies: 45
    • Forum: Plumbing Jobs | The Job-board
  20. T

    Zoning

    Is everyone up to speed on the new zoning regs for heating
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