Energy Efficiency in Older Buildings: A Holistic Approach
In the realm of home improvement, the question often arises: should you replace your old windows with newer models? It's a query inundated by the clamor of advertisements touting the benefits of brand new windows. However, the crux of energy loss in older buildings doesn't solely lie in the windows; a significant portion dissipates through air leakage.
An older home can experience a staggering 4-8 air changes per hour at 50 Pascals, meaning that every hour, fresh air infiltrates the home, and conditioned air escapes 4-8 times over. In contrast, a passive house, renowned for its energy efficiency, mandates a mere 0.6 air changes per hour according to the Passive House Institute. Surprisingly, windows only account for about 30% of energy loss, as per the energy code of Canada for regions like New Brunswick. Thus, prioritizing air sealing emerges as a paramount consideration over window replacement.
Enhancing the air seal of your home involves various measures such as weatherstripping windows and doors, sealing windows trims with appropriate air barrier materials, bolstering the air barrier, and fortifying attic insulation to ensure airtightness throughout the entire envelope. These interventions offer significantly higher returns on investment compared to window replacements alone. Embarking on a deep retrofit demands meticulous planning and prudent financial decisions.
Insulation and Draft-Sealing:
Investing in top-tier insulation materials like cellulose or Roxul proves instrumental in curbing energy consumption and reducing costs. Insulating all walls, attics, and basements can yield substantial benefits, with studies showcasing potential energy savings of up to 30% by effectively retaining heat where it's needed most.
Quick Tips:
Consult Professionals: Engage professionals equipped with thermal screening cameras to identify precise locations of energy leaks and devise the most cost-effective solutions for remediation.
Pipe Insulation: Insulate all interior hot water pipes to mitigate heat loss, resulting in consistent savings on monthly utility bills.
HVAC Duct Sealing: Employ foil seals on all HVAC duct seams to minimize energy leakage, thereby optimizing the efficiency of your heating and cooling systems.
In conclusion, while the allure of new windows may seem enticing, the true path to energy efficiency in older buildings lies in comprehensive measures such as air sealing, insulation, and draft-proofing. By prioritizing these strategies, homeowners can not only reduce their environmental footprint but also enjoy substantial long-term savings on energy costs. It's not just about windows; it's about transforming your entire home into an energy-efficient sanctuary for years to come.