Documento riservato – A solo uso interno / Confidential document – Internal use only
The reasons of a 14 kW heating only boiler
The use of more insulating materials in the buildings makes more and more usual
the necessity to install boilers that have very low central heating output (6 or 7 kW for
a housing of 80-100 m
2
).
High heat outputs are required for instantaneous DHW production, especially in
case of two simultaneous showers, hydro-massage bathtubs, etc.
Installing an 80 or 120 litres indirect cylinder in combination with a 14 kW boiler it is
possible to compensate for the low available output with a hot water storage.
DHW performance of 14-24 kW heating only boilers with indirect cylinders:
80 litres cylinder 120 litres cylinder
Litres in 30
minutes ΔT30°C
Recovery time
(minutes)
Litres in 30
minutes ΔT30°C
Recovery time
(minutes)
ECO
3
1.140 300 14 350 20
ECO
3
1.240 420 8 460 10