Why hive insulation has no general answer: A heat-balance view of published thermal and field data

This repository contains the version 1.0 release of a technical note on the thermal effects of honey bee hive insulation. The note combines a transparent heat-balance model, published thermal and field data, official climate normals, and a re-analysis of the publicly available raw data from St. Clair et al. (2022). It examines how the effect of hive insulation changes with colony strength, brood area, brood coverage, outdoor temperature, solar radiation, ventilation, nectar drying, and moisture transport. The analysis does not support a universal rule that insulated or single-walled hives are always superior. Instead, it suggests that insulation is most likely to matter for weak colonies, large brood nests, cold conditions, and wintering, while its effect on established colonies and honey yield remains uncertain. The note explicitly distinguishes measured values, derived quantities, assumptions, and uncontrolled practitioner observations. The repository includes:- the technical note;- the heat-balance model;- a re-analysis script for the St. Clair et al. (2022) overwintering trial;- input data, calculated results, and generated figures;- citation and licensing information. This is an independent, non-peer-reviewed technical note. It presents an evidence synthesis and illustrative model, not new field measurements or a universal management recommendation. The literature review was selective rather than systematic, and the model results depend on several uncertain assumptions documented in the note. Code, text, figures, and original data are licensed as described in the LICENSE file. The included third-party St. Clair et al. (2022) dataset is distributed under its original CC0 1.0 dedication.