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Articles on subsidies, renovation and heating technology — explained clearly by a certified energy consultant.

23 articles

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Tenants vs. Owners — Who Benefits from Renovation?

Modernization surcharge, CO₂ cost sharing, and subsidies: Why renovation is a win for both sides.

Complete Renovation vs. Individual Measures — What's More Effective?

All at once or step by step? Costs, subsidies, and results compared.

Financing Renovation — Which Subsidy Combinations Are Allowed?

BEG, KfW, §35c, state programs: Which you can combine and how to maximize your funding.

Tax Deductions for Renovation — §35c Income Tax Act Explained

Deduct 20% of renovation costs directly from your tax bill: How §35c works and when it pays off more than subsidies.

KfW Loan vs. BAFA Grant — When Is Which the Better Choice?

Loan or grant? When which funding path is right and how to optimally combine both.

Smart Home & Energy Saving — Intelligent Heating Control in Old Buildings

Smart thermostats, window contacts, and energy monitoring: What really saves and what pays off.

BEG Reform 2026: The New Funding Conditions at a Glance

New BEG conditions apply since July 21: climate bonus 16%, cap €28,000, new income and family bonus. All changes at a glance.

Solar Thermal vs. Heat Pump — Which Fits Better?

Costs, efficiency, and subsidies compared head-to-head — and when which technology is the better choice.

Ventilation with Heat Recovery — Required or Just Smart?

When mechanical ventilation is required, what it costs, and why it almost always makes sense after renovation.

Solar PV + Battery Storage — Is It Worth It for Your Home in 2026?

Costs, returns, and subsidies: Whether a PV system with battery storage is still worth it for your home in 2026.

Heat Load Calculation — What Is It and Why Do I Need It?

Required for heat pumps and subsidy applications: What a heat load calculation costs, how it works, and why it prevents costly mistakes.

Triple Glazing in Old Buildings — Myth or Worth It?

Many hesitate to install modern windows in old buildings. Why triple glazing works and when it pays off.

Heating Season Over — Time to Plan Your Renovation

Spring is the best time to plan renovations. How to approach timing, contractors, and subsidy applications.

Typical Old Buildings in Siegerland — Spotting Renovation Potential

Half-timbered, 1960s build, or 1980s estate house: What weaknesses your building year has.

GEG Becomes GModG — The New Heating Law at a Glance

Germany's Building Energy Act becomes the Building Modernisation Act. The 65% rule is dropped, the bio-ladder arrives. What homeowners need to know.

Energy Consulting in Siegen — What Does It Really Cost?

Process, costs, and funding for energy consulting in the Siegen-Wittgenstein region.

Insulation: Exterior Wall, Roof, or Basement — Where to Start?

Not all insulation delivers equal returns. How to set priorities and avoid common mistakes.

Hydraulic Balancing — The Underrated Measure

Low cost, big impact: Why hydraulic balancing is often the best first measure.

Heat Pump in Old Buildings — Does It Work?

Myths vs. reality: When a heat pump makes sense in existing buildings and what to watch out for.

Energy Certificate: Consumption vs. Demand — Which Do I Need?

Two types, different informative value. When which energy certificate is required and what it costs.

Heating Replacement: What Subsidies Are Available in 2026?

Heat pump, pellets, or hybrid — which subsidies you get for which system.

iSFP Explained — Why a Renovation Roadmap Pays Off

5% extra funding, clear priorities, fewer mistakes: What an iSFP delivers and how it works.

BEG Subsidies 2026 — What's Funded and How Much?

KfW, BAFA, BEG: All current subsidy programs for renovation and heating replacement at a glance.

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