Will dehumidifiers make the house warmer?

[Debbiedoodah]

Trying to get things in advance of the winter to lower my energy costs and getting things when on sale or second hand.

I want to get a dehumidifier so I don't leave my clothes to dry over the radiators - thought this would be straightforward, ok get a small one. However. In researching about them I've heard some people say they make their house overall warmer so the thermostat can go down - if you have one have you found that and if so does that mean I need to get a large whole of house/20l one?

Also got an electric blanket and air fryer,any other purchases that could help?

Mine blows out very slightly warm air when on clothes drying mode.
But having previously lived in a damp, mouldy flat without central heating, I can tell you it certainly feels warmer if the air isn't damp. I don't know if your house is generally damp and dank, but if so it'll be easier to heat if the air isn't so wet.

There are two types. One warms the air (we have two and they really do make a difference) and the other type doesn't warm the air at all. Research to make sure you get the right type. When we run ours, it really does make a difference. They're not all that cheap to run, but the warming type offset against the heating costs a bit.

Using a dehumidifier will remove dampness from the air so it will make your heating more efficient, but it will cost extra to run, so work out the cost to heat vs cost of dehumidifier capital & operating to see if you make a saving.

Is a dehumidifier cheaper to run than a tumble drier though?

We got one from Aldi last year, it's very good, washing dries quickly. Also combats the impact of heavily insulating an old house (condensation). Got to say I didn't notice it was expensive to run, but we were on a fixed deal last winter

As others have said, the compressor in the dehumidifier produces heat as part of the process, which is a bonus. As it takes less energy to heat dry air than moisture filled air you save on heating costs too. A dehumidifier costs about the same amount to run as a fridge and IMO is essential if you dry clothes indoors.
My washing dries overnight in the bathroom with the door closed and the dehumidifier running on its normal setting, though I start it off with couple of hours on the higher fan setting.

It depends a lot on the tumble dryer. At the moment we've got a vented one in the garage so the heat it produces is largely wasted. Following the death of or old dog we've now got space in the utility room and we're planning on getting a heat pump tumble dryer. At that point we may use the dehumidifier in the bathroom, and keep the heated airer for items which can't be tumble dried.