Adding a radiator to cold room

[Mrxman]

Hi There

I am putting up a second radiator in a cold ground floor front room and was hoping to get a plumber in to connect the pipes once that's done.
The existing radiator is on opposite side of where the new radiator will be installed (Under window).

Question:

Will the plumber be able to connect the new radiator to the existing radiator or are other measures required?

There's a 22mm flow/return robber pipe in kitchen and from memory the 3 existing ground floor radiators are all connected via plastic 15 mm cable. Think it was done 5 years ago.

 

[Madrab]

Depends on the size of the rads really. If it's easy to get to the 22mm backbone F&R then running new pipework from that to the new rad would be the ideal. If the rad already in the room isn't too big then 15mm extensions may be able to be run without compromising flow/heat to either, will need a bit of balancing though.

 

[Mrxman]

Depends on the size of the rads really. If it's easy to get to the 22mm backbone F&R then running new pipework from that to the new rad would be the ideal. If the rad already in the room isn't too big then 15mm extensions may be able to be run without compromising flow/heat to either, will need a bit of balancing though.

The current radiator in the room is a double 100 x 60 cm. It's connected back to back to another radiator same size in adjacent room. There's also a single radiator in the corridor 110cm x 60 cm. The new radiator is a double 30 cm x 90 cm.

The 22 mm backbone F&R is visible running down wall in kitchen but getting access under the floor would mean pulling up the vinyl and plywood. Could be done but obviously annoying.

 

[Mrxman]

Btw I think our heating system is connected as a 'feed and return' type system as opposed to single pipe loop. Does that make any difference as to whether I can connect an additional radiator?

 

[Madrab]

Connecting another radiator isn't the issue, as long as there is enough capacity in the boiler, it's whether you can connect it to the same 15mm pipe that other radiators are connected to. A 15mm pipe will only provide a certain amount of flow and heat per hour therefore the max you would run off of the same 15mm pipe would usually 2 mid sized rads without compromising heat up times etc.

A 2 pipe system is ideal, a 1 pipe system would create all sorts of headaches when adding new rads.

 

[Mrxman]

Connecting another radiator isn't the issue, as long as there is enough capacity in the boiler, it's whether you can connect it to the same 15mm pipe that other radiators are connected to. A 15mm pipe will only provide a certain amount of flow and heat per hour therefore the max you would run off of the same 15mm pipe would usually 2 mid sized rads without compromising heat up times etc.

A 2 pipe system is ideal, a 1 pipe system would create all sorts of headaches when adding new rads.

Thank you. Much appreciated