18kW or 26kW - higher or lower says Brucie

[ian.]

which size of boiler did you go for?

I went for the 18kW as this matches the DHW recharge loading time of my cylinder, also in CH mode, this size will give me plenty of ’heat from cold’ headroom and the ability to add radiators in the future should they be needed.

A 12kW boiler was a good suggestion and one I hadn’t previously considered, however, I felt the output didn’t give me much spare.

 

[gmartine]

The Ideal Vogue has HW priority so you don't need to factor in "spare" CH capacity as such, you already have it if set up correctly.