I am also not familiar with orangeblossom, but this advice should work regardless. To get an idea of how much to use, you could make a 1L tea with one gram of orangeblossom, which will be the same concentration you are planning on using in your beer. Taste it to see if it is the strength of...

If stored properly hops will keep for a couple of years. Stock up so you have a supply while you find a substitute.

Were the grains crushed at the time of purchase or did you crush right before brewing? Either way the age of the grain probably isn't the issue, I think Brulosophy had an experiment that used grain that had been crushed years before and there wasn't a significant impact on efficiency. My own...

After a few brews with this set-up I have yet to have any significant moisture build up in the flexible duct, the worst I've had was when it was -15°c outside, the end of the duct near the outside vent was damp.

I also thought that might be a problem, but I leave the fan running for 10 or 15 minutes past the end of the boil and so far no issues.

This update is coming later than I had expected, but life got in the way and I've not brewed as much as I wanted the past few months. After a few experiments and some equipment upgrades, I have settled on a ventilation setup for my brewery that meets my needs. What I am using is a 600cfm insert...

Welcome back (Verdun here)

I"m now tempted to use the pack of Belle Saison in my fridge that expired in 2016.

I've never worried about the temperature changes harming the yeast, and I've never had an issue reusing yeast I've washed like this. I assume the water you are using to wash the yeast has been boiled and allowed to cool, that you're not just using water from the tap for this

Started with extract kits, then to brewing my own recipes with DME/LME and steeping grains, did two partial mash brews then switched to all grain.

The main reason make up air is important is to avoid creating a negative pressure in the house which would draw exhaust fumes from things like gas fired water heaters and furnaces back into the house, a potentially deadly situation. Thankfully I have all electric appliances in my house, so the...

400 cfm is pretty much the limit for a 4" duct, I would prefer a 6 or 8" duct but I want to try to avoid drilling through my foundation. Make up air, if needed, can come from an open window in an adjoining room. I think while I'm waiting for the Anvil to arrive I'll do some ventilation...

My son is a plumber, he could probably make me one.

I have an Anvil 10.5 on order, I have no idea what kind of boil off to expect, but if I need it they do make a condenser for it.

Is it ducted to the outside or is it placed in a window?