Gas Combi Range Rating

[Flembot]

I’m going for an oil to gas conversion and going for a combi boiler. Had a combi at our last 3 bed house and want the same again. No system boiler and water tank. Just combi.

In our last property we had an Ideal Logic - which we couldn’t range rate which was a pity

I’m keen on efficiency and control. I’ve had a couple quotes through from engineers but they keep pushing me towards these Alpha boilers and Ideal Logic , but they can’t range rate them , what on earth is the point..

What are your thoughts on this and surely a Valliant or Viessman is the way to go. The better the modulation the better . I mean, why not? If it’s out there let’s leverage it. Surely range rating is a good thing and not a bad thing?

Semi detached 3 bed house
X7 rads
2 occupants.

Nothing complicated

I’m interested in weather compensation too by the way.

 

[cross thread]

various options,vokera and intergas have budget to top end

 

[Nintendofan]

I’m keen on efficiency and control. I’ve had a couple quotes through from engineers but they keep pushing me towards these Alpha boilers and Ideal Logic , but they can’t range rate them , what on earth is the point..

Does range rating really make that much of a difference anyway?

At full boiler power the CH water will get to temperature quicker before the fan modulates, with a range rated boiler it will initially use less gas when switched on from cold but take longer to get up to temperature before it modulates to the exact same setting as non range rated.

 

[cross thread]

Range rating great to help keeping the boiler condensing and stop short cycling

 

[Nintendofan]

Range rating great to help keeping the boiler condensing and stop short cycling

you sure, I thought range rating only 'capped' the maximum output. The minimum output would be the same regardless of what you cap it at.