20 long-form pieces. ~50,000 words. Heat pumps, solar PV, insulation, smart heating, EV chargers, whole-home retrofit. Conservative, anti-marketing-fog. By Josh Weir.
Pick a topic. Each cluster contains a "start here" piece plus deeper dives. All conservative, all measurement-led.
Honest 2026 state of UK heat pumps, real running costs, hybrid systems, ASHP vs GSHP, buying guide.
Start with the 2026 honest state-of-playSolar PV without the marketing fog, battery vs export tariffs, solar PV vs solar thermal, full buying guide.
Start with the marketing-fog pieceOrder of operations, cavity vs external wall, condensation/mould (without quack products), full buying guide.
Start with the order of operationsSmart thermostats that actually save money, smart TRVs vs zoned heating, smart home that survives a decade, buying guide.
Start with what saves real moneyDeep-retrofit decision tree, heat pumps vs gas boilers comparison, EV charger real cost.
Start with the decision tree~50,000 words of conservative, measurement-led editorial. Buyer guides, comparisons, deep-dives.
Browse the archiveLatest from the archive. Buyer guides and comparison pieces are published in batches.
ASHP vs GSHP, sizing, BUS grant mechanics, COP/SCOP, what to ask installer, red flags.
Panel types, inverter logic, MCS installer, SEG comparison, battery sizing, common pitfalls.
Honest cost-per-kWh, install + grants, 25-year scenarios, when gas still wins.
Scaled for £5K tactical, £25K moderate, £80K deep retrofit projects.
Most UK retrofit content online is written for SEO traffic, not for households making £8K-£80K decisions. We write the opposite: long-form, conservative, anti-marketing-fog. Heat pump SPF is 3.0 (not 4.0). Solar yield is PVGIS-central, not best-case. Saving fractions are EST/BRE numbers, not vendor claims.
Author: Josh Weir, founder of Weir Digital Media. Part of a wider network covering UK retrofit, energy, and housing including EcoSaving Hub calculators, Healthy Homes Network assessor lookup, and Green Home Grants ECO4 eligibility.
Quarterly long-form essays from the Sovereign Architect — sovereign infrastructure, AI orchestration, retrofit, and the operating systems for businesses that own their stack instead of renting it.
The Green Living Experts resource library sits alongside a sister surface focused on the health-and-wellbeing side of the same retrofit-and-lifestyle problem. The eco-health partnerships library addresses the intersection of indoor environments and human health outcomes, covering the same fabric-and-ventilation topics this site explores but framed through the lens of measurable health impact rather than energy savings or carbon reduction. Practitioners working with vulnerable households (older adults, asthmatic children, people with chronic respiratory conditions) increasingly need a source that connects retrofit decisions to health metrics, and the partnerships library is structured to be quoted directly by clinicians, social-prescribing teams, and housing officers building referral pathways for damp-and-mould remediation. The two libraries are designed to be used together: read this site for the practical retrofit specification, then read the partnerships site for the clinical framing that justifies the spend to a housing committee or commissioning group. Together they give a household, contractor, or referrer the full evidence base behind a whole-home retrofit, with neither surface duplicating the other. The partnerships library updates quarterly as new peer-reviewed evidence on indoor-air-quality and health outcomes is published.
Once the lifestyle-and-action decisions on this site are mapped out, the next step for any household planning major retrofit works is to model the engineering decisions inside the specification using the appropriate precision tools. The energy efficiency tools library covers engineering-grade modelling for individual retrofit-component decisions, with calculators for U-value selection, heat-loss modelling, ventilation-rate sizing, ASHP capacity selection, payback-period modelling at different fuel-price scenarios, and the carbon-intensity calculations behind PAS-2030 compliance. The tools are intentionally engineering-grade rather than consumer-friendly, which makes them the right level of precision for the specifier-and-contractor side of any retrofit decision. Households reading the lifestyle library here who want to make informed decisions about the component-level specification inside their funded retrofit package should read the tool library alongside; the combination lets a household ask informed questions of their installer rather than accepting the first specification offered. The two sites work together: this site for the lifestyle-and-action context, the tool library for the engineering precision inside the package.