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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. M

    Inhibitor in multi-zoned system

    Hey if putting inhibitor in an multi-zoned system ( S plan plus). With an underfloor heating zone, hot water zone and radiator zone. Is it just needed to add inhibitor to the system via a radiator.
    • Mgrant
    • Thread
    • central heating system forum inhibitor plumbing system water zone zones
    • Replies: 6
    • Forum: Plumbing Zone
  2. N

    Multiple zones.

    Hi, Im sure this question isn't a new one but im having to add another zone for an extension. There is currently 4 zones in total 1 for the cylinder and 3 for heating . My question is, is there a limit for the (electrical side) for how many zones you can have? as far as im aware there isnt but...
    • Nvq level 3
    • Thread
    • forum multiple plumbing zone zones
    • Replies: 7
    • Forum: Plumbing Zone
  3. Chalked

    Wifi controls

    Pricing a boiler change in a fairly large 1990, house. ( 2 boilers, megaflo etc) the customer specifically wants to control through his iPhone. i will need to control two heating zones ( two thermostat sensors) and hot water timing and possibly temp? theres a few out there now. Has anyone fitted...
  4. P

    Calculating fuel use to different zones in house - anyone good at maths?

    Hi - we have a pellet boiler that heats three zones. I want to be able to work out what percentage of the fuel and maintenance costs to allocate to the different zones - reasonably accurately. I looked at heat meters but saw that they were expensive. I then thought of monitoring the pumps - if I...
    • peterpumpkin
    • Thread
    • anyone different forum house plumbing zone zones
    • Replies: 20
    • Forum: Plumbing Zone
  5. M

    Need an experienced electrician/plumber

    I posted a thread a couple of weeks ago but have not had things sorted yet. We have a Vaillant 630 EcoTECH boiler, 61/2 wiring centre, VRC470F controller and Megaflo cylinder. We have 2 zones CH and Vaillant said it was not wired properly. However, we will soon have underfloor heating so, as I...
  6. M

    Underfloor heating on in certain zones when hot water is on

    Hi, I am new to this site and I hope I am posting my query in the correct forum. i have a problem with my underfloor heating, I will try and explain as best as I can. i have underfloor heating in 2 floors, ground and 1st. Each floor has multiple zones effectively each room in the house. i...
    • Manishpatel1971
    • Thread
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    • Replies: 12
    • Forum: Plumbing Zone
  7. D

    Different CH zones at different temps

    Dear All, We're doing a remodel of our mid terraced house. After much agonising to do with low water pressure and flow, we're getting a Sundial S plan plus system with a conventional boiler. The plan is to have thermaskirt on the downstairs on one heating zone, the standard rads on first and...
    • dgrs
    • Thread
    • different forum plumbing temps zone zones
    • Replies: 2
    • Forum: Plumbing Zone
  8. D

    Honeywell RF2 pack 5

    Dear All, Just when I thought I had cracked the wiring for a sundial S plan plus, I started looking at controls and the RF2 pack 5 seems to do all I need: separate DHW and 2 heating zones. However, I think I'm being stupid here, but I don't understand how it's controlled.... I understand if...
  9. H

    zones

    Hi Does anyone know what is the best way to zone a combination boiler? I have got to fit an outside oil combi boiler, but need to zone heating for upstairs and downstairs as well, to conform to new regs. I am guessing two two-port valves is the way to do it, unless you can tell me different, and...
    • Hollie
    • Thread
    • forum plumbing zone zones
    • Replies: 9
    • Forum: Plumbing Zone
  10. M

    Pipe lay-out for multi zoned Central heating systems

    Hey does anyone know were I could find some diagrams of a multi-zoned central heating system were the flow and returns go to kind of like a big manifold in say 2inch not far from the boiler. And the flow and returns from the zones come back to this.
    • Mgrant
    • Thread
    • boiler central central heating central heating system forum header heating manifold multi pipe plumbing system systems zone zoned zones
    • Replies: 35
    • Forum: Plumbing Zone
  11. A

    ufh zones

    I have a project coming up where I want to use 2 seperate ufh manifolds with the same boiler. The manifolds would have zone valves on them so would I need to put zone valves in the feeds to each manifold? ta alan
    • alant
    • Thread
    • boiler forum manifold manifolds plumbing ufh valves zone zones
    • Replies: 7
    • Forum: Plumbing Zone
  12. L

    Building regs part L

    Hi again Just posted about these regs and have just read this All new systems in dwellings that aren’t open plan must have at least two heating zones, each controlled by a thermostat and zone valve. In addition, all radiators must have Thermostatic Radiator Valves (TRVs) fitted except those in...
  13. R

    Central Heating Zones - New & Replacement Systems

    According to the Domestic Building Compliance Guide (2010 with 2011 amendments) page 22 it states: "Dwellings with a total usable floor area up to 150m2 should be divided into at least two space heating zones with independant temperture control, one of which is assigned to the living area."...
    • rodders
    • Thread
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    • Replies: 87
    • Forum: Plumbing Zone
  14. B

    combi and split zones

    got to quote for a new build small house . the boiler will be a glowworm 30 kw ultracom 2 with upstairs and down seperate heating circuits. i have a few concerns the boiler is going in the kitchen with rear piping jig and the flow above the boiler split into 2 for the zones with 2 port valves .i...
    • buckley plumb
    • Thread
    • combi forum plumbing split zone zones
    • Replies: 2
    • Forum: Plumbing Zone
  15. F

    Heating zones

    His guys quick question I am fitting a new heating system. Three bed terrace Worcester 27cdi combi three rads downstairs and 4 upstairs. Customer as asked if I am planning on zoning off upstairs and downstairs. Does building regulations state this is a must? Or just a guideline? Any help...
    • Flanners
    • Thread
    • central heating system downstairs forum heating plumbing three zone zones zoning
    • Replies: 1
    • Forum: Plumbing Zone
  16. S

    Help with Part L zoning requirements for new build

    Hi, Do any of you guys work regularly on new builds? Just staring my first ones (six) since the revised part L came into force. I'm just looking for some clarification on zoning requirements, before i go and make a fool of myself. The total useable floor area is less than 150 m3 (actually 120m3)...
    • Saltdean
    • Thread
    • build help new build part l parts requirements under upstairs zones zoning
    • Replies: 22
    • Forum: Plumbing Jobs | The Job-board
  17. O

    Part L heating zone compliance??

    What is the best way with boiler upgrades etc to comply with zoning requirements of part l, programmable trv's etc......
    • oaky
    • Thread
    • boiler central heating system combi compliance forum heating part l parts plumbing programmable still zone zones
    • Replies: 18
    • Forum: Plumbing Zone
  18. B

    Under floor heating manifold

    Hi all, I have recently moved into a barn conversion with an 11 zone continental UFH manifold. two of the zones are completely dry and I need some help to fix it. The strange situation is, the end set for the filling / draining doesn't have an opening tap ? it has a hose connector and a air...
    • bryanlittlefair
    • Thread
    • attach floor heating manifold other under under floor heating water zones
    • Replies: 5
    • Forum: Plumbing Jobs | The Job-board
  19. M

    New building regs on zoning

    Hi all, I think this has been asked already. But I could really do with some tailored advice. I have been asked to quote a full central heating system in a 3 bed house. I am going to supply a Worcestor Bosch 24i Junior and 7 rads. I know I have to provide 2 heating zones with 2 thermostats, 1...
  20. R

    New central heating requirement for 2 zones?

    Hi, I heard someone metion the other day, that any new heating now requires 2 heating zones to be fully compliant of the Building Regs. One zone upstairs and one zone downstairs (if less than 100 meters sqaured, and more zones if over 100 meters squared). Is this right? Would it be the case if...
    • rodders
    • Thread
    • boiler central central heating central heating system customer forum heating new plumbing requirement right zone zones
    • Replies: 10
    • Forum: Plumbing Zone
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