What Makes a High-Efficiency Window?
Posted: October 22, 2025 | By: PPM Supply
When building or renovating homes, choosing the right windows is critical. High-efficiency windows improve more than just a property's curb appeal - they can significantly reduce energy costs and enhance indoor comfort. At Perth Planing Mill Supply, we make it simple for contractors to find dependable, energy-efficient window options. We offer various window solutions designed to maximize energy savings and reliable performance in residential builds.
Understanding Window Ratings
To recommend the right windows to your clients, you need to understand the factors that determine their efficiency. Here are the key ratings that matter:
-
U-Factor:
This measures heat transfer and insulation performance. Lower U-factors mean better insulation, helping maintain comfortable indoor temperatures.
-
Solar Heat Gain Coefficient (SHGC):
Indicates how much solar heat is let into the home. Lower SHGC ratings reduce cooling needs, making them ideal for hot climates.
-
Visible Transmittance (VT):
Measures the amount of natural light that passes through the window. Higher VT ratings allow more light in, reducing reliance on artificial lighting.
-
Air Leakage (AL):
Reflects how much air escapes through the window frame. Lower air leakage ratings mean tighter seals, helping maintain energy efficiency.
-
ENERGY STAR® Certification:
Windows that meet these strict standards guarantee superior energy efficiency and quality, a key selling point for contractors and homeowners.
-
Superior Insulation
Ostaco windows use advanced technology to achieve ultra-low U-factors, reducing heat transfer. They keep homes warm in the winter and cool during the summer, lowering energy use year-round.
-
Optimal SHGC Ratings
Designed to conserve energy, these windows reduce heat gain, minimizing the need for air conditioning and helping homes stay comfortable for less.
-
High Visible Transmittance
Most homeowners want to prioritize bright, natural light. Ostaco windows balance high VT ratings with energy-efficient design, so clients get well-lit spaces without spikes in energy usage.
-
Exceptional Airtight Performance
Low air leakage ratings mean fewer drafts and better indoor comfort. Ostaco windows seal tightly to maintain a consistent indoor temperature and make your heating and cooling systems work more efficiently.
-
Design Flexibility
Energy efficiency doesn't mean sacrificing aesthetics. Ostaco windows come in various styles, finishes, and configurations, making them adaptable to any client's design preferences.
Why Ostaco Windows Are the Smart Choice
Frank by Ostaco windows are ENERGY STAR certified and built for efficiency, helping contractors to provide their clients with long-term energy savings, comfort, and durability. Here's what sets this brand apart:
Invest in High-Efficiency Windows
When it comes to selecting windows for new builds or renovations, Ostaco windows represent a smart investment for builders and contractors. Their high efficiency, beauty, versatility and reliable performance make them a standout choice in today's competitive window market.
At Perth Planing Mill, we're committed to equipping builders with reliable, efficient products for every project. If you're replacing windows or planning a new build, Ostaco windows offer the performance you can count on. Contact us today or visit our website to explore more high-quality window and door options to complete your next job. Let's keep energy efficiency at the forefront of building practices and help homeowners achieve more comfortable, sustainable homes!