TRV or Manifold/thermostats in upstair room

[jayroc2k]

I am sorting out the 30yr old central heating and would like some help deciding on the two options

It is a 3 storey Victorian house with 4 bedroom and 2 bath

Option 1

• Keep all radiators upstairs and link them to a single programmable thermostat with TRVs

• UFH downstairs and a single radiator, all running off an Emmeti manifold which allows control of the radiator and UFH separately

 

Option 2

• Keep all radiators upstairs but each room on a separate loop controlled via its own thermostat running off a manifold

• (Same as option 1)UFH downstairs and a single radiator, all running off an Emmeti manifold which allows control of the radiator and UFH separately

   

 

The second option is more expensive as it requires new plumbing so each room are on a separate loop, thermostats, manifold costs etc. however, this option allows me to add a wet UFH to each of the bathrooms with some degree of control

Is option 2 an overkill?  

[ragg987]

Is your house well insulated or a typically cold and draughty victorian house?

 

If the latter then, in my view, any attempt to keep individual rooms warm and others cold simply makes the whole floor feel uncomfortable and draughty. I would be inclined to treat the floor as a single zone (with programmable thermostat) and rely on radiator TRVs to trim individual rooms.

 

If you want wet UFH in upstairs bathrooms, could you just extend them out from ground floor and leave the rest as radiators in a single zone?

 

A lot depends on how you intend to occupy the house, living patterns, numer and age of occupants etc.

[jayroc2k]

Thanks,

 

It is a draughty Victorian house although I will be putting in full double glazing, Rockrool between joists and insulating the ground floor (50mm XPS/EPS/PIR as the joist is only about100mm deep resting on another 100mm joist sitting on bricks which was a terrible idea and th ejoist touching the bricks show signs of rot (close my eye and pretend I did not see them

 

The make up will be 22-25mm battens, 50mm insulation and 16mm pipes allowing for 12mm safety margin so the flooring does not sqish the pipes

 

Its an end terrace so I am still debating insulating the gable wall due to the original coving and a developer has put in planning for an infill house which will turn it into a mid-terrace house in the coming years (he is at least 12-18 months away from even starting)

 

 

here is the emmeti manifold controller, it allows hot temp on one side and lower temp on the other side with full controls and ability to turn on/off the boiler

http://emmeti.co.uk/products/t3-ufh-heating-controllers/m3v-control-sets/

 

 

[Nickfromwales]

You'll likely need radiator flow temps in excess of those delivered by Ufh manifolds. You can choose to oversize the radiators to compensate but either option needs proper investigation and the system needs to be able to heat the house when it's bitterly cold and windy outdoors. . 

Will the Ufh downstairs be over a floating timber floor? What's the intended insulation levels where the Ufh is?