One of the best beers I ever brewed was a lager a few years ago, brewed during cold weather. I fermented it in a conservatory with the heating set low (about 12°C), then turned down further to frost protect (about 5°C) whilst the bottled beer lagered.
I thought I'd try & brew something similar with the current cold spell we're having in the UK.
Mash: 1 hour 15 mins held at 65°C throughout.
3.5 Kg pale malt
Boil: 45 mins
50g of Pioneer hops added 15 mins before the end.
100g of Pioneer hops added 5 mins before the end.
10g of Irish Moss added 5 mins before the end.
50g of Pioneer hops as dry hops into the cool wort. This made 12 litres of wort with an OG of 1.044 & a FG of 1.014 which should give me a beer of around 4.5% alcohol & 85 IBUis of bitterness. The very late addition of the hops should give me a very hoppy beer without too much bitterness being extracted.
The boiling wort was cooled using a 10mm diameter copper coil wort chiller & Saflager w-34/70 yeast hydrated during the brewing stage was pitched.
The fermenting wort was put in my garage & wrapped in several layers of silvered bubble wrap. The wort temperature dropped from 15°C to 14°C over around 8 hours, even though the outside temperature was 1°C. The only heating in the garage is from the fridge & freezer coils in there, but hopefully the self-heating effect of the wort's fermentation will keep this around 12°C. If not then I have a brew belt at hand.
Bottled on 23rd January. Mostly clear when bottled, excellent clarity after just one day in the bottle.