Heat pumps represent one of the most significant advances in residential heating and cooling technology. Unlike conventional furnaces that burn fuel to create heat, a heat pump transfers thermal energy from one location to another, achieving efficiencies of 300 percent or more. For homeowners looking to reduce their energy bills and carbon footprint, understanding the […]
The Critical Role of Indoor Humidity in Health The relationship between indoor humidity and human health is one of the most important yet often overlooked aspects of building science. Research going back decades, including the seminal Sterling et al. study published in Environmental Health Perspectives, has established a clear connection between relative humidity levels and
The Demolition vs. Renovation Decision Framework Every homeowner facing an aging, underperforming house must eventually confront a fundamental question: is it better to tear down and rebuild or invest in a thorough renovation? The answer is rarely simple, and as a recent discussion on Green Building Advisor highlighted, even experienced builders disagree on the right
The Passivhaus building standard has long been viewed as a niche approach reserved for custom home builds with generous budgets and environmentally motivated clients. However, a recent project in Seattle’s Columbia City neighborhood is challenging that perception. A developer there sold what is believed to be the first built-on-spec Passivhaus building in Washington State, demonstrating
The ACI 2010 conference in Austin introduced groundbreaking concepts in flood-resistant home construction, most notably the “Wash-n-Wear House” — a prototype developed by the Louisiana State University Agricultural Extension Center in partnership with Building Science Corporation. This innovative approach demonstrated how buildings could be designed to recover from flooding with minimal repair, allowing homeowners to
The Weatherization Assistance Program (WAP) stands as one of the most significant federal initiatives aimed at reducing energy costs for low-income households while improving overall building performance. Operated by the Department of Energy, this program has weathered decades of political scrutiny, funding fluctuations, and administrative growing pains. Understanding how weatherization programs function, the challenges they
The journey toward building a superinsulated home that meets the Passivhaus standard involves a complex series of decisions, trade-offs, and careful planning. Few real-world examples illustrate this process better than the story of the Lemon family in Brattleboro, Vermont, who set out to construct an exceptionally energy-efficient house on a tight budget. Their experience demonstrates
Micro CHP systems how combined heat and power works for your home represents a technology that has transformed the energy landscape of Scandinavia. During a visit to Sweden, I toured two state-of-the-art wood-chip-fired combined heat and power (CHP) plants in Kristianstad and Växjö. These facilities demonstrate how capturing waste heat from electricity generation can dramatically
Residential buildings account for 21 percent of total U.S. carbon dioxide emissions and roughly 4.3 percent of global CO2 output. Since the first energy crisis of the 1970s, weatherization programs have made meaningful progress tightening up the nation’s housing stock. The Weatherization Assistance Program alone has treated some 6.2 million dwellings since 1976, cutting energy
How Feed-In Tariffs Are Driving Renewable Energy Growth Worldwide Feed-in tariffs represent one of the most powerful policy tools available for accelerating the adoption of renewable energy systems. These government-mandated, long-term power purchase contracts guarantee that electricity generated from renewable sources is bought at rates significantly above wholesale market prices, creating a stable financial incentive
