Evidence & Editorial Policy
Homebrewing is an intersection of microbiology, organic chemistry, thermal dynamics, and culinary art. Here is how we verify calculations, evaluate equipment, and disclose our commercial relationships.
1. The Science of Sanitation vs. Cleaning
More batches of homebrew are ruined by poor cold-side microbiology than by recipe formulation flaws. Throughout our guides, we maintain strict distinctions:
- Cleaning (PBW / Sodium Percarbonate): Removes organic proteins, beer stone, and hop resins from equipment surfaces. You cannot sanitize a surface that is not clean.
- Sanitizing (Star San / Acid-Anionic Surfactant): Kills 99.9% of wild bacteria and wild yeast in 30 seconds of wet contact time. It requires clean non-porous surfaces.
- Sterilizing (Autoclave / Pressure Cooker): Required only for yeast starter agar slants and pure culture propagation.
We advise against harsh chlorine bleach on stainless steel (which causes pitting and stress corrosion) and caution against abrasive scrubbing sponges that scratch plastic fermenters.
2. Equation Verification & Calibration
Every calculator on Homebrew Guide runs on published, peer-reviewed brewing equations:
• Tinseth Bitterness: Uses Glenn Tinseth's bivalent utilization factors accounting for boil wort specific gravity and boil time.
• Thermodynamic Infusion: Based on the specific heat of dry malt (0.4 cal/g·°C relative to water 1.0).
• Carbonation & Residual Gas: Derived from dissolved CO2 saturation tables across fermentation temperatures under 1 atm pressure.
3. Commercial Independence & Affiliate Disclosure
Homebrew Guide is funded through affiliate referral commissions. When you follow an outgoing link to retailers like MoreBeer, Northern Brewer, Adventures in Homebrewing, or Amazon and make a purchase, we may earn a small percentage of the sale.