Two loop UFH system heating 24M2 with lots of glass.
Loop lenghts 90M each X 16MM OD piping
UFH output 9.52kw.
flow/return 55C/34C, dT 21C
fowrates, 3.0LPM & 3.5LPM = 6.5LPM total
Boiler Vaillant Ecotec plus 438.
flow/return 65C/59C due to high recirc rate required to get the boiler away at ignition conditions with UFH only on.
The UfH output was "validated" by taking gas meter readings which gave a boiler consumption of 11.44kwh which gives a boiler efficiency of 83.2% so reckon reading reasonably accurate.
Query: Is the UFH output of 9.52kw from a two loop system and a dT of 21C plausible? and if so does it indicate that the heat is being dissipated in a badly installed under floor system.
Loop lenghts 90M each X 16MM OD piping
UFH output 9.52kw.
flow/return 55C/34C, dT 21C
fowrates, 3.0LPM & 3.5LPM = 6.5LPM total
Boiler Vaillant Ecotec plus 438.
flow/return 65C/59C due to high recirc rate required to get the boiler away at ignition conditions with UFH only on.
The UfH output was "validated" by taking gas meter readings which gave a boiler consumption of 11.44kwh which gives a boiler efficiency of 83.2% so reckon reading reasonably accurate.
Query: Is the UFH output of 9.52kw from a two loop system and a dT of 21C plausible? and if so does it indicate that the heat is being dissipated in a badly installed under floor system.
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