Best way to run rad pipes?

[Johnboy54]

Hello to all.
I'm intalling a new central heating system in my very empty house. No plaster and no ceilings yet.
It will have 2 bedrooms and a bathroom between. The boiler will be on the landing opposite the bathroom.
Downstairs (solid floors) will be a kitchen, then dining room, then lounge.
With a radiator in each room, what would you suggest the best run between rads would be, and could I drop down to each rad or should I run pipes on the surface between downstairs rads?
I'm not connecting anything to the boiler. I'll get a pro in to do that and the gas.
Thanks for any advice.

 

[Norcon]

You shouldn't surface run any pipe! It's not aeshetically pleasing to one's eye.
Drops to the rads are fine but will need individual drain off valves fitted.
OOh and track the walls.

 

[LeedsPlumber]

Down the walls and dot and dab over if wall not plastered, use rad valves with drain off on

 

[Johnboy54]

Thanks for that, Norcon.
I probably didn't explain properly though what I meant by the 'run'.
Which rads should I 'run' to first, and last I meant.
And do you mean channel the walls out when you say track?
Thanks again.

 

[Johnboy54]

And thank you too, LeedsPlumber.

 

[Norcon]

Yes a channel and large enough for 10mm wall armaflex insulation.
You run to to what ever radiator comes first within the practical limits of your chosen pipe run using a two pipe arrangement starting from the heat source.
You need to zone upstairs and down stairs separately.
Part L says that anything UP to 150 sq/M of floor area needs at least two zones.
So if you have two rooms in your property (living and sleeping) then two zones operated by motorized valves.

 

[Johnboy54]

Thank you very much, Norcon.
I'm sorted now.
Thanks.