Renting - requesting new radiators?

lookstraightahead

FreeBear said:

By "unvented/no fins", I'm assuming these are Type 10 flat panel radiators. Replacing them with similar sized Type 11 (single panel, single row of fins) or Type 21 (double panel, single row of fins) will increase the amount of heat kicked out - Wouldn't recommend Type 22 *double panel, double row of fins) as they stick a long way out of the wall.

BUT before the radiators are replaced, the room dimensions (and other info) needs to be fed in to a calculator to check the sizing is optimum for each room. Then the boiler capacity needs to be assessed to make sure it is up to providing the extra heat. Once that has been done, then by all means ask the LL if he is willing to fund replacement radiators. But before you do that, hang some heavy thermal curtains over the windows & sliding doors - You'll be losing quite a bit of heat through them at night.

Should also point out that if the place is draughty, even with new radiators, it will be a pig to keep warm. So radiators need to be added in conjunction with other energy saving measures.

This is what our boiler man says when we wanted new radiators for our new (very old house). He suggested going through a winter before investing, and just getting a couple of mobile ones for now.

freebear, I'm always knocked out by your knowledge (damp issues especially) 😇

mattyprice4004

If the efficiency of the radiators is being hampered by them being partially blocked, you'll probably find they're fine once sorted. 
I'm in a big 4 bed detached house and most of my radiators are singles, we keep the system well cleaned and they're putting out a tonne of heat  

rmills55

Just to update you all,
Plumber changed the 3 port, and it does indeed work a bit better, but the two living room ones are still terrible at the bottom. The plumber was happy with the water in tank In attik, the water coming out when flushing it (he put chemical in the morning and ran system for 6 hours before returning to flush)

 
He recommended 2 New radiators in that room, he said it would work out cheaper for my LL to do that than pay for a power flush, which with valves ect of this age he was worried they might start leaking. So I didn't even have to ask! The other radiators are of course being left.

The heating still gets stuck in after a new 3 port, new programmer/timer, so we're at a loss to what's causing this