#718: Electrification, What Kind of Windows, and Uncomfortable Bonus Rooms

Prioritize building envelope improvements: Before upgrading HVAC systems like heat pumps, invest in better insulation, air sealing, and high-performance windows to significantly reduce heating and cooling loads, leading to smaller, more efficient systems and lower bills.

Consider an energy audit first: For any significant home efficiency upgrade, start with an energy audit, including a blower door test and thermal imaging, to identify specific problem areas and develop a comprehensive plan.

Be cautious with window warranties: Understand that many window warranties are prorated, offering little value if a failure occurs late in the warranty period. Focus more on a window's fit for your needs and its known performance and durability.

Evaluate window materials carefully: While fiberglass is often praised, modern UPVC windows can offer comparable or even superior performance in terms of U-factor, air infiltration, and condensation resistance; consider both materials based on specific product specifications.

Opt for operable window types with better seals: When choosing windows, prioritize types like casements or awnings over double-hungs for better sealing and energy performance, especially in colder climates.

Address problematic 'bonus rooms' comprehensively: For uncomfortable spaces above garages or with kneewalls, a piecemeal approach to insulation is often ineffective. The best solution is typically to remove drywall, properly air seal, and insulate the entire assembly to make the space part of the conditioned envelope.

Understand the impact of electrification on the grid: Be aware that widespread electrification, including EV charging, can strain existing grid infrastructure. Smart home technologies (e.g., smart panels, solar + batteries) and utility demand management programs are key to managing these increased loads effectively.