How much pipe does a room take?
A quick estimate before you draw anything: the heated area divided by the spacing, plus the runs to the manifold and back. The planner then measures every circuit along the pipe itself.
- Pipe in the floor
- Runs to the manifold and back
- Circuits
- each about
- Pipe in total
How it is counted
- Pipe in the floor: the area divided by the spacing. At 150 mm that is 6.7 m of pipe for every square metre.
- Every circuit goes to the manifold and comes back: twice the distance from the room, for each circuit.
- When the total is longer than one circuit may be, the room is cut into as many circuits as it takes, each with its own pair of leads.
- Furniture that stands on the floor for good (kitchen units, a bath) is left out of the heated area.
Figures on this page are common trade values, given for orientation. Check your design against the pipe manufacturer’s data and the rules where you build.
An estimate is not a layout.
The real length depends on the shape of the room, where the door is and how the leads run through the hall. Draw the room in the planner and read it off the plan.