Recent content by andrewk

I watched the first episode - but no more. I think the BBC have failed to understand that Top Gear was really about Clarkson, Hamster and James May, with the cars being almost incidental. A new Top Gear series without them is pretty much guaranteed to fail. My guess is that this is the...

Indeed, yes - old cast iron heat exchanger boilers have few parts and will last pretty much forever. For example, I still have a Glow Worm Space Saver 40B, which has been outstandingly reliable and will probably outlast me. The big downside is that, despite the full load efficiency being...

It's only the very best framing systems that get near the U values used in the original calculations. I suspect that prices for those will be horrendous.

I suspect that your U values are more than a bit optimistic. Whilst it is many years since I practiced in this field, I remember typical U values for double glazed windows being around 2.5-3 W/sqM.degC. A quick wander around the Pilkingtons website suggests that this is still typical for...

The XR Rikenon 50mm f1.7 is one very sharp lens. It is obviously sharper than the kit lens at the same focal length. Andrew