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I have a system with 2 nos 2 port valves. The actuator heads are Sunvic, motor open and motor closed 5 wire type, rather than actuators that use a spring in one direction (presumably to close) and I guess only have 3 wires. Does anyone have any preference from experience for one type over...

"Billy Bob" is the 'Opentherm' control you mention the make of the controls? Is it compatible with all boilers?

I think that the problem highlighted by "Onetap" is probably what was nagging me about how the two worked together. "Gas4you" - do you know how the Vaillant WC deals with the problem of the initial 'fast heat up' phase or does it also require something more sophisticated to override it until...

I understand the idea of boilers having their power requirements modulated by sensing either flow water or internal air temperature. I can also understand the idea that a boiler can modulate dependant upon external weather data ie Weather Compensation. But I don't understand how, if they...

Thanks for all of your replies.

Age and efficiency of the old one. We had it installed 25years ago and it has given excellent service but we would prefer to renew it now rather than wait for it to pack up usually at the worst time of the year. The rest of the system is ok, rads all heating fine, fitted new pump couple of...

I am aware of various comments in postings here about the unreliability of Ideal boilers but most of them seem to relate to wall mounted Isar combis. I am looking to replace a 15+ year old floor mounted Ideal Mexico on a fully pumped vented system. I don't have the supply pressure for a...

Thank you JohnD

Any tips for breaking the bath up in to easily removable pieces. It is in a second floor flat. Only access via 4 'short' flights of stairs, not a lot of room. Is a hefty lump hammer the best tool or is there something else? I tried to break one up many years ago but I recall it wasn't as...

Thanks for all responses, I will be fitting a 'Black Hole' vent giving 100sq cm free area. However can someone tell me why BS5440 Part2 2000 requires a Free Area of 5sq cm for every 1KW input above 7KW, ie 35sq cm for a 14kw input fire, but everyone here and the manufacturer tells me to use...

No, ground floor is concrete slab.

Apologies, I didn't explain clearly enough. The house was built 10-15years ago and in keeping with many houses then and now, was built from new with the all ground floor internal walls lined with plasterboard on plaster spots rather than a more traditional 2 wet coat plaster. The air brick...

If its not for fire ventilation then does anyone know the purpose of this airbrick? It can't be to ventilate the gap between the plasterboard and inner block wall surely, this defeats the object of any insulation in the wall cavity. If its not serving any useful purpose then it could be...

Thanks for replies. Whilst looking for the best place to fit a ventilator I have found that there is already a traditional clayware ventilator fitted low down in the cavity wall. However the vent is only visible externally. Internally the walls are dry lined with plasterboard and you cannot...

I understand that a room containing a gas fire with an input greater than 7KW requires additional ventilation of 5sq.cm for every kw over 7kw. Does the size of the room not have a bearing on the amount of additional ventilation required? Instead of using an 'airbrick' through the cavity wall...

Many thanks Chrishutt :D

I am about to replace old rad valves with Danfoss TRV's. The system is 8mm copper microbore. To fit the 8mm pipe the TRV's come with a brass adaptor rather than a separate olive. The adaptor is supposed to 'collapse' and seal against the pipe like an olive when tightened but it looks quite a...

Utterlydiy, we seem to have a similar problem. I dreaded the thought of trying to sand the Sadolin coating back to bare wood. I spoke to Sadolin and they said to use Nitromors. I have tried it on a small area and it seems to have worked well and without too much effort. On the same small area I...

I don't want to use a solvent based finish again, but by the same token I did not want to apply a finish to something as important /expensive as hardwood window frames only to find out afterwards that if I didn't like the finish for some reason, or more correctly if my wife didn't like it :wink...

Oilman, That’s why I made the comments back to Breezer, its only after a period of exposure that you can judge the performance. My biggest concern was that if, after I had applied the oil, I did not like the finish for some reason, would I be able to recoat with something other than oil ie back...