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Receipts in northern China increasingly read "base charge plus metered charge" rather than "yuan per square metre". This guide follows that shift: where the policy has reached, how a metered bill is actually calculated, how heat is apportioned between flats, why the window is the largest single loss even though it has the smallest area, and the three places metering reform usually stalls.

Eight floors, one floor of space to work with, everyone else still at their desks. This is not a question of how to finish the work but of how people, materials and hoists follow a single work front upwards. The three segment tables, the four hard constraints (noise, dust, vertical transport, hot work), a three-day cycle per floor, and why an interior-side screen suits this so well.

Every heating season the shocks return: the curtain, the doorknob, the elevator button. The root cause is not the fabric but dry air — below roughly 30% relative humidity, static builds up. Reading the humidity-voltage table, fibre moisture regain and the GB/T 12703 test methods, and the right order to fix it: humidify first, then choose fibres, then discharge before touching metal.

Solar radiation falling on a shade fabric has only three destinations: transmit, reflect, or be absorbed. Reading the test items of JG/T 424, openness factor and colour explains how to choose a shade fabric — and where the physical limit of interior shading lies.

Jilin Province launched its 2026 energy-efficient window replacement consumer subsidy for old residential buildings on October 10: 50% of the pre-tax total cost, capped at 6,000 RMB per household. A joint inspection by the heating authority results in an official "External Window Thermal Defect Assessment Form" — the first time window insulation quality has a template-based official verdict.

When a curtain wall repair crew hangs its suspended platforms, the owner almost always asks whether the shading can be added at the same time. The economics look obvious: the fixed cost of a suspended platform — suspension rig, counterweights, wire ropes, safety locks, erection and dismantling under a dedicated method statement, roof supervision, ground hoarding, insurance — barely changes with the scope of work. But piggybacking only works on the same work face, with the same process, and with materials that can actually get up there. This case record walks through the three gates exterior shading fails: structural verification and design under GB 55022-2021, facade approval, and platform capacity and transport limits under JGJ 202-2010 and JGJ 59-2011. It then shows what really can be shared — the time window — with two non-conflicting work lines, three contact points (measurement, contamination, acceptance), and three red lines (fire rescue windows, curtain wall perimeter firestopping, no interior closing during hose testing).

The placement of radiators under windows is not a habit but a code requirement: GB 50736-2012 clause 5.3.7 recommends installing radiators under exterior windows so the rising convective warm plume blocks the cold air descending along the glass. This article explains the downdraught loop step by step — a glass inner surface around 12C in a 20C room, cooled air sinking along the pane, spreading over the floor, and being reheated by the radiator — plus the ISO 7730 limits on radiant asymmetry and vertical air temperature difference, three common mistakes that waste radiator output (decorative covers, blocked plume paths, curtains over the heater), the humidity drop of the heating season, and how an interior shading screen adds a stationary air buffer between the cold glass and the occupants without touching the radiator or the glazing.

The same window can carry three numbers: SC 0.42 on an old glass test report, SHGC in the current energy code, and a g-value of 0.37 in an imported facade brochure. They are not three things — they are three ways of bookkeeping for one physical process. This article explains the definitions (SHGC is absolute, SC is relative to a 3mm clear glass baseline), the two baseline values (0.87 international / 0.889 domestic), how current standards are converging on SHGC, how JGJ/T 151 Chapter 8 computes combined glazing-plus-shading systems, and a three-step method to put any two reports on the same table.

At an October 20 press briefing, Shandong released its 15th Five-Year Plan for housing and urban-rural development and split "good housing" into three tasks: build new housing well, retrofit old housing well, and provide good service. Inside the retrofit section sits a standalone sentence — intensify energy retrofit of existing residential buildings — alongside two hard numbers: 2,500 old urban neighborhoods and 20,000 elevators to be added or replaced over five years. For households, the window is the fastest-payback link: full replacement is costly, but interior-side shading screens with third-party tested shading rates of 88%, 95%+ and 99% add a thermal buffer without touching glass or facade.