Hi there,
I was just wondering what's the best in terms of reliability and general performance.
a) System boiler and cylinder (unvented or vented)
b) Heat only boiler with sealed system kit and cylinder.
Looking at some of the Vaillant boilers, the heat only ones seem to have a much wider modulation range, would this be more efficient?
I was just wondering what's the best in terms of reliability and general performance.
a) System boiler and cylinder (unvented or vented)
b) Heat only boiler with sealed system kit and cylinder.
Looking at some of the Vaillant boilers, the heat only ones seem to have a much wider modulation range, would this be more efficient?