Lagging eber hot air pipes.

[V1701]

If the hot air pipes are within the cabin space, why lag them? The heat loss will be into the boat interior which is where you want the heat anyway.

Unless you live in a locker you're not benefiting from the heat.

Also every time the ducting turns 90 degrees it looses something like 2.5% of the heat which is compounded along it's length. The most efficient systems have the straightest ducting

...think daveyw's point is that if the hot air pipes are not inside a locker why lag them. One of my pipes runs right underneath the starboard settee so I might not lag that bit cos it effectively warms the seat!

 

[vyv_cox]

...think daveyw's point is that if the hot air pipes are not inside a locker why lag them. One of my pipes runs right underneath the starboard settee so I might not lag that bit cos it effectively warms the seat!

Heat escaping from the ducting may warm things but the places you want to be warm may suffer as a consequence.

One of my ducting runs goes almost the whole length of the boat, from the stern locker to the forecabin. One of the main aims of fitting it was to get the forecabin warm, as that is where we sleep. Before lagging the ducting the amount of heat reaching to the forecabin outlet was not great, whereas after lagging it was quite acceptable.

 

[V1701]

Heat escaping from the ducting may warm things but the places you want to be warm may suffer as a consequence.

One of my ducting runs goes almost the whole length of the boat, from the stern locker to the forecabin. One of the main aims of fitting it was to get the forecabin warm, as that is where we sleep. Before lagging the ducting the amount of heat reaching to the forecabin outlet was not great, whereas after lagging it was quite acceptable.

Yes hadn't thought that far ahead. I've recently got my first boat, live in Bristol & boat's in Gosport, which is a bit frustrating. So I'm spending quite a lot of time thinking about how I will do things & the forum's great for getting ideas & tips...