Duct insulation material

squizzel · 26 Dec 2016

Replacing the air heating system in my 70's property and found this foamy, fibrous material wrapped around the ducting, with a "fashionable" woodgrain veneer. Anyone know what it might be, best way to remove it and if it's worth holding on to?

More pics: https://imgur.com/a/3VQbN

Doggit · 26 Dec 2016

I've no idea what it is, but it looks like fibreglass.
Are you getting rid of the air system, or just replacing the of heater.

squizzel · 26 Dec 2016

Doggit said:
I've no idea what it is, but it looks like fibreglass.
Are you getting rid of the air system, or just replacing the of heater.

Cheers, it certainly looks like fibre glass to me but thought property predated it.

Replacing entirely with a wet system. Existing air system is beyond repair and so taking opportunity to modernise.

Doggit · 26 Dec 2016

It would have predated Rockwool, but not fibreglass; but there are replacements heaters for hot air systems.

squizzel · 27 Dec 2016

Doggit said:
It would have predated Rockwool, but not fibreglass; but there are replacements heaters for hot air systems.

Tempted to get it tested for asbestos, simply because it was built in that period of 70's England before it was banned.

A straight replacement was my initial plan, but ultimately going with wet after weighing up all the pros and cons of each and their impact on the property itself. (Losing the immersion heater, expansion tank, shower pump, warm air monstrosity in kitchen, ugly giant air vents, and in return getting instant, pressurised hot water and reclaiming a whole load of much-needed cupboard storage space!)

Doggit · 27 Dec 2016

It has no signs of asbestos to me; you'll already have been breathing it in, so if you rub it on your arm and it hurts, then you'll know it's fibreglass, not asbestos.

simond · 27 Dec 2016

We swap out many warm air units with warm air combis. You have a standard combi boiler of your choice coupled with an air handling unit for the ducted warm air.

Many of them have a mixture of rads (in extensions) and warm air. Most nowadays we control with an evohome touchscreen for zoning.

squizzel · 27 Dec 2016

simond said:
We swap out many warm air units with warm air combis. You have a standard combi boiler of your choice coupled with an air handling unit for the ducted warm air.

Considered it (this was my preferred choice) but ultimately because the property is quite small, there was no room to site both units sensibly.

Doggit · 27 Dec 2016

I believe there are warm air heating units that have hot water boiler built into them

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Duct insulation material

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