Recent content by Roddy Young

The moisture from the drying clothes pulley will migrate around the house. It's not a bad idea to extract the damp air near where it is produced, so if the clothes are hung up in a utility room or kitchen, then the extract valve in that room would do the job. Even if the pulley is somewhere...

Hello, we built a new house in 2011 with MVHR system. As long as you can draught proof your house, then your project should work. Halls and "dead space" do not need ventilating but if you really do dry clothes in the airing cupboard then it would be sensible to have an extract vent there. I...

Our heating system is working perfectly, except that the Vaillant boiler has to modulate right down when only the underfloor heating manifold is being supplied. It needs water at 35°.This means the boiler is on for ages. It is annoyingly loud even at the minimum 4kW. I have suggested a revised...

I googled for: ceme 1.021715 and got this: https://www.247boilerparts.co.uk/alpha-3014379-1021715-low-water-pressure-switch-675-p.asp

We have a Vent Axia unit which is very similar and have lived in this house since it was built in 2012. Initially I had similar concerns to you - but not now. The moist air is sucked up as you said but then expelled through the vents to the outside. It passes through a heat exchanger where it...

Here's a copy of page 21

Have a look at page 21.....

According to REHAU, the balancing and flow adjustment is done by turning the square headed screws under the thermoheads, not by turning the flow meters - see screenshot attached (which shows the manifold before the thermoheads are fitted.)

If you don't cook with gas you could have the gas cut off and save the standing charge, ie total gas account cost = £ 0 Roddy

Ours is water based ufh with a manifold with 10 circuits. The actuators on the manifold are wired to an OJ control box - circled in the photo. Roddy

Our thermostats were made by OJ about 2010 and branded Rehau. They are a different style to yours but I suspect OJ use the same sort of mounting arrangement. The middle part simply pulls outwards - it's held in by friction. There is no latch to release or screw, etc. Of course I can't guarantee...

I mean we have OJ controls in our house. Sorry about my ambiguity. Your reply from OJ does suggest it will be difficult to find replacements.

Hello, We have OJ thermostats and controls. They simply pull out and off their backplate - but they are quite stiff. Here is a link to OJ: https://ojelectronics.com/floorheating/products/on-off-thermostat-mtu2/ Googling suggests they may still be available in Europe.

Free standing heaters like these produce exhaust gases which must be allowed to escape by ventilation - which also allows your nicely heated air to escape. This is, in my opinion, a pretty poor arrangement, suitable only for very localised heating in a large workshop for example. Using one in a...

We have an unvented system with expansion vessel. When the diaphragm died in the EV, exactly the kind of smeary, oily drops appeared - and were first noticed in the bath water.