- May 23, 2015
- 35,144
- 1
- 14,996
- 113
- Member Type
- Heating Engineer (Has GSR)
so basically he doesn't need a 35kw boiler , he doesn't say his priorities are a really good flow for his shower which wasn't mentioned at any time by the op or anyone . but i agree entirely with what your saying as for being down rated on ch but how many people ( general public ) actually have their boiler down rated until a right minded engineers turns up to provide his services 😉 , but a viessman now thats another subject 😵🙂 , horrid things🙂
recently been dealing wth 938's in two bedroom flats 😵 they were cycling more than armstrong on speed 🙂 all 12 of them 😵
think your on about vaillants not viessmanns
and heating modulation is automatic high demand (eg starting up heating) then goes to low demand eg 10-15kw for when the temps up