To not want my house to be heated with bath water?

[Iburntthecakes]

Please settle this for me and DP.

After a conversation with colleagues DP has decided that it is a waste of money draining all that hot bath water down the drain. Instead if we leave it in the bath then the heat and the steam will circulate through the house thereby reducing our heating bill

I've just had to deal with cold grey bath water two days running

Please help him see sense.

I don't know why the theory is bollocks but it is, without doubt, utter bollocks.
Something to do with condensation cooling surely? Won't that lead to issues with dampness?

How hot do you have the bath?

Oh fuck.............is this a 'cake' thread?

Wont that increase condensation and risk of damp?

Is that taking thriftiness to a new extreme?

What are you going to save? 0.004p per year by using the heat from a bath to heat the house, let the bath water out, chuck him a couple of coppers and tell him to stop being such an arse.

You need to get lots of buckets, fill them with said bath water and put them in every room to get the best effect. I personally would just pull the plug out

Please tell me more CheCazzo - I need to blind him with science.

Not a 'cake' thread, promise. Thought I should have namechanged

It is right, leave the water there till it is cool then drain.

I must admit to it always feeling like a waste to let a bath full of hot water just run down the drain but letting it go cold in the bath can at best keep the bathroom a bit warmer. There's no way it would be enough to warm a whole house.

Maybe he needs to engineer some kind of heat exchanger where he can run the hot (ish) water through and into pipes throughout the house. Bloody well more expensive to install than it would save in your lifetime (even assuming you are 22)!

It would be better, cheaper and more energy efficient not to have a bath.

I would imagine anything you could possibly save in heating bills would be lost by having to use extra cleaner and hot water on the bath to get ride of the tide marks to say nothing of the cost of clearing the drain more often because the grease and soap scum go down solid.

Just confronted him with the condensation issue.

He considered this and has decided we can keep the door shut. I asked how the heat will then transfer to the rest of the house and he claims that due to the position of the bathroom ie on the ground floor and sharing walls with a couple of other rooms the heat will still transfer.

He also claims radiators work this way so why should it not be efficient.

Please don't suggest engineering works Crikeyblimey

Has he compared the temperature of a radiator to that of a bath someone has finished with?

Pull the plug out then detatch and hide it

It's true that leaving the bath water until it's cooled to an ambient room temperature will increase the room temperature. But unless you've got lots of enormous baths all filled at once, it's unlikely to make a significant difference to your heating bills.

Quite aside from the added condensation and damp this bath plan will cause.

Your DP would save far more money on the energy bills by having cold baths instead.

I've suggested that cold baths would be more energy efficient.

This is a ridiculous idea he says.

FFS

Iburnt are you sure this isn't a wind up?

My ever so helpful dh has just suggested a pipe running the cooling bath water via a pipe around your mattress to warm the bed.

I have told him how helpful you will think this is and he's now nursing a bruise.

Radiators don't work like that.

There's a fairly easy practical experiment your DP can try, when he's home alone. This will work best if the heating's been off for a few hours beforehand. Turn one radiator, and only one radiator in the house on. Make sure it's shut away in a room with a closed door. Stand on the other side of the door, and wait to see how long it takes the single radiator to warm the house. Or even all the walls of the room.

For good comparison to this bath idea, the radiator should be turned off after a bit - say the typical length of time it takes you to have a bath.

Well, my dad used to have his bath at 6pm & leave the water in so that the bathroom would be nice & warm for me & db getting ready for bed. Sometimes we'd have a quick dunk in his bathwater too!

It is probably daft because of all the condensation.

If we use the oven in the evening at this time of year, though, we always leave the door open after switching it off to make use of any residual heat! You could try dh on that one....