Boil off increase

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chrissyr63

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My last to brews have undershot on on litre - aim for 23-24 but have been near 21. Is this just the summer heat that is causing this? Would people add more water\wort or shorten the boil (doing 70 mins)?
Didn't liquor back but might do if this is what summer is going to do.
 
Personally, I never shorten the boil!

All I do is to wait until the wort is cooled, transfer it to the FV and then blast in cold water from the tap to make the volume up to the required 23 litre mark before taking the OG.

"Blasting" the water into the FV:
  • Oxygenates the wort before pitching the yeast.
  • Creates a layer of foam on top of the wort that acts as a cushion against the wort if it is a bit too warm for dry yeast being sprinkled on the top.
I have one of these fitted to the water supply and change the cartridge every Spring.

https://www.amazon.co.uk/dp/B005CAZDBY/?tag=skimlinks_replacement-20

Not cheap but great for the "peas of mine"! :thumb:
 
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I do no chill, so after transferring the hot wort to the FV I top up if required with boiling water from the kettle.
I expect you're loosing more water than expected because currently air humidity is really low.
 
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