Generator exhaust through a wall?

If its not subject to vibration, a fireclay will work well.

Otherwise you want a collar and a flexible gasket or similar.

Stove blacking might work, but any paint is likely to come off right near the manifold, and if you use mild steel, the thing is going to rust anyway.

We were somewhere around Barstow, on the edge of the desert, when the drugs began to take hold. I remember Bill saying something like:

Any decent car accessory shop has spraycans of Sperex exhaust paint or similar. Trick is, to paint and bake, but if your oven isn't big enough, or your missus is hostile to the idea, you can cure the paint in-situ by gently running the engine - instructions are on the can.

I'd go for a downward slope through the wall, then an elbow pointing the pipe downwards on the outside - I have faith in Gravity :) To seal the hole you could try glass-fibre rope (wrapped around the pipe and packed into the hole) from the Proper plumbers' merchant / stove shop to avoid draughts, and a piece of suitably-bent ally sheet over the elbow to deflect the rain?

I used to use Sperex VHT enamel, sold for exhaust manifolds, not sure if it's still available or under the same name - Halfrauds will have similar in a choice of colours, I'd think. I found that it adheres better if stoved

Just my tuppence worth,

Dave H.

I'd suggest glass rope for packing and high temperature silicone sealant to finish off inside and out. The tube really does need to slope down to prevent rust and all joints inside need to be gas-tight to prevent carbon monoxide build up. Ventilation also required as with a boiler.

Could avoid rust and rain by making a silencer from concrete blocks, attached to garage wall.

NT

I thought of doing something similar except building an outdoor block 'bunker' for the generator and porting the air and cooling intakes from the outside (possibly easier to do than a hot exhaust), allowing the exhaust and cooling air to exit via a baffles in the blockwork.

Lift up heavy duty lid for refueling and starting and a removable end panel for unit extraction / servicing.

Keeps the general noise levels down, less risk of poisoning and takes up less room in the garage. It could double as a garden bench or BBQ stand. ;-)

Cheers, T i m

My experience with cars is that it only lasts so long - I'm not sure if it's the temperature that gets to it eventually, or just nasties in the exhaust gases.

For a fixed install like you have, I think I'd look into adding a sleeve over the external part of the exhaust; something that keeps itself far enough away from the hot pipe that it'll stay looking nice (just pay attention to where any moisture that gets in is going to go - cut a small drain hole or two at the base if necessary)

cheers

Jules

Buy a Carbon Monoxide detector, or even better build a bunker outside for the generator and fetch the wiring through the wall.

In message , The Other Mike writes

Good point. Bunker is a nice idea but as it is already bolted down and wired in it's a bit late! The only things left to do are fit the exhaust and build a small bund around it so the garage doesn't get flooded if there's a leak.

The exhaust is being fabricated and should be sorted by the weekend.

Only hiccup with the plan is I just had an eye op' and have been told not to lift anything heavy for 4 weeks, I think that probably includes oil tanks and exhausts!

Previous advice is taken on board and I'll report back on how it goes.