Recent content by david3456

Not at all. You claimed that reducing the temperature of a radiator with a fan reduces its heat output. You're the one talking nonsense. I did not say it at the time but given your attitude, I say it now.

There is a massive contradiction in this statement alone. If you are not interested what are you doing here?

If all else remains the same, the "potential" energy in the water entering the radiator remains the same. Increasing the temperature drop across the radiator with a fan means that more energy has been taken out of the water. This is different to increasing temperature drop through reduced water...

I have Hive TRVs, thermometers, boiler ebusd and monitor everything in Home Assistant. It informed me that a couple of TRVs are in a warm spot so the room can be 2 degrees lower than the setting. With the difference being weather dependant this cannot be corrected with an offset. I put some USB...

https://www.calculator.net/dew-point-calculator.html Enter loft temperature and humidity and it gives the dew point. Enter temperature and humidity from readings inside your house and you get the interior dewpoint. If the former is lower than the latter, the PIV should do something useful. If...

Plumbers fitting oversized boilers seems to be a general problem. I have an Ecotec 424 which can only modulate down to 6kW but the setting goes in 1kW steps up to "Auto". Strange yours has a lowest setting above its minimum power. Anyway, like you, I put a temperature monitor on it. I discovered...

Both ends of the radiator do exactly the same thing. In combination, they provide a resistance to water flow, up to a maximum set by the fixed end.

Same here. I haven't even bothered to balance my radiators. I have seven Hive TRVs monitored by Home Assistant on a Raspberry that shows they don't need it. The TRVs find a balance point and only adjust by small amounts. (Hive TRVs show up as Danfoss) I also break the "rule" that says that a...

I have just fitted a Hive thermostat and two TRVs. The system works correctly with the new thermostat and standard TRVs and I have balanced the system so that demand for the boiler is removed before or more or less as the TRVs shut down. The idea of fitting the Hive TRVs was to be able to set a...

A few clues on the RCD helped the diagnosis. Thanks. It's gone through a cold wash and some spin cycles. A new heater now on order.

It's about 2005-ish. It ran for about 5 minutes until the drum filled. Perhaps the heater has become electrically porous. OK, found it now. So it appears it should more sensitive than the one in the CU, it's not that the CU is detecting something a type A would not.

We have just switched on the washing machine for the first time after a CU change. Needless to say, it trips the RCD. We then discover this in the machine instructions: I know there are different ways of fault detection but I can't find any reference to this symbol. What is this type and is...

10-40 mm... 7kN/m2... Order placed. Thanks.

Thanks. Do you really mean concrete, not mortar? The 30mm is the combined mortar and spacer lift so the aim is start with 10mm of mortar with no spacer at one corner and thicken the mortar elsewhere, reaching perhaps 15 + 15 at the worst point. Perhaps the thing that concerns me is not the...

I am converting part of a garage to utility area and want to raise the floor to house floor level. (The area is to be sealed from the garage with fire break.) My idea is to make footings from two 45x95 timbers resting on mortar beds onto the existing concrete floor then lay joists over these...