Should these pipes be insulated?

[Weebles]

We have a separate plant room, inside the thermal envelope of the house but accessed externally. This weekend has been a good opportunity to do jobs we’ve been putting off like making a stand for our water softener. Whilst in there I noticed that none of the pipe work is lagged. Would you lag the hot water pipes in here? The room is pretty warm due to all the kit in here. Any thoughts please?

[ProDave]

Definitely, at least all the hot pipes need lagging. Apart from anything else it will reduce the standing heat losses from the HW tank.

[Dreadnaught]

I agree with ProDave.

I wonder out of general interest, does your plant room have underfloor heating pipes embedded in the floor? Does it have an MVHR extract (I can see the MVHR unit itself)?

[Mr Punter]

Yes, lag all the hot pipes.  You may also want to undo some of the clips so you can get thicker insulation around.  Lag the cold pipes too if you are really bored.

[Weebles]

3 hours ago, Dreadnaught said:

I agree with ProDave.

I wonder out of general interest, does your plant room have underfloor heating pipes embedded in the floor? Does it have an MVHR extract (I can see the MVHR unit itself)?

no UFH. But does have intake and extract for MVHR. And boiler. And data racks. And water softener.  
I have some pipe lagging lying around so at the very least I’m going to use that. Am somewhat surprised our plumber didn’t lag the pipes but not that surprised.