M
micketherton
I have just fitted 7 underfloor heating pipe loops of my 3 floored Victorian house. I have the idea to make up a simple "natural" system without any auxillary items, using two manifolds made with 22mm push-fit copper tee pipes and locate it under the ground floor staircase in cupboard.
2 upper floors of wood with 4 loops on spreader plates; and 3 ground floor on screeded loops, with 2 convential rads serving existing area.
I intend to use a combi condensing boiler, and run the supply heating pipe first directly to two in-line conventional radiators, then return that flow to the input manifold for the 4 underfloor wooden upper floor heating loops. That return manifold will go an input manifold supplying the 3 underfloor concrete ground floor heating loops. Then this return manifold will go back to the boiler!
I figure the conventional radiators will lower the water temperature down for the wooden floor manifold, then this lower temperature water return will go into the concrete floor manifold, which will then return to the boiler at a much cooler temperature! Thus making a very efficient condensing system. I will monitor the temperature drop with temporary thermometers at each return manifold to see how it works out !
I will balance the loops with gatevalves on their returns (or what else do you suggest).
I intend to only use the inbuilt boiler water temperature thermostat and timer, to control the whole house's heating temperature, and to only use the inbuilt boiler pump to circulate the system. I can always retro fit thermostatic radiator valves in-line on each loop in each of the rooms if the heating is uneven.
Q.1. Do I need to put in any Automatic Airbleed Valves on the upper storey loops, or is there enough water pressure in the system to force any air bubbles back down to the manifold AAV on the ground floor? If not, where does the AAV go? -Just before the return pipe goes vertically down to the ground floor manifold?
Q.2. Do I put AAV,s on BOTH the inlet AND return manifolds?
Q.3. Is the inbuilt combi pump strong enough to do this job? 6m head. Any recommendatations of a good boiler! Is a Smart Pump a good idea?
Q3. Is this workable? and what else should I consider. All your thoughts are most welcome- good or bad! mant thanks
2 upper floors of wood with 4 loops on spreader plates; and 3 ground floor on screeded loops, with 2 convential rads serving existing area.
I intend to use a combi condensing boiler, and run the supply heating pipe first directly to two in-line conventional radiators, then return that flow to the input manifold for the 4 underfloor wooden upper floor heating loops. That return manifold will go an input manifold supplying the 3 underfloor concrete ground floor heating loops. Then this return manifold will go back to the boiler!
I figure the conventional radiators will lower the water temperature down for the wooden floor manifold, then this lower temperature water return will go into the concrete floor manifold, which will then return to the boiler at a much cooler temperature! Thus making a very efficient condensing system. I will monitor the temperature drop with temporary thermometers at each return manifold to see how it works out !
I will balance the loops with gatevalves on their returns (or what else do you suggest).
I intend to only use the inbuilt boiler water temperature thermostat and timer, to control the whole house's heating temperature, and to only use the inbuilt boiler pump to circulate the system. I can always retro fit thermostatic radiator valves in-line on each loop in each of the rooms if the heating is uneven.
Q.1. Do I need to put in any Automatic Airbleed Valves on the upper storey loops, or is there enough water pressure in the system to force any air bubbles back down to the manifold AAV on the ground floor? If not, where does the AAV go? -Just before the return pipe goes vertically down to the ground floor manifold?
Q.2. Do I put AAV,s on BOTH the inlet AND return manifolds?
Q.3. Is the inbuilt combi pump strong enough to do this job? 6m head. Any recommendatations of a good boiler! Is a Smart Pump a good idea?
Q3. Is this workable? and what else should I consider. All your thoughts are most welcome- good or bad! mant thanks
