Keep the Cold Out: How Windows & Doors Help Save Energy All Winter

Stay warm and lower your energy bills this winter with DUALLY WORKS tilt-turn windows and doors.

Learn how U-factors, SHGC, and ENERGY STAR® 2025 standards define efficiency — and see how our systems outperform typical U.S. windows.

Why Energy Efficiency Matters

When the New England winter rolls in, your windows and doors play a huge role in how warm and efficient your home feels. Poorly insulated windows can leak heat and money — while the right system locks warmth in and keeps drafts out.

Benefits at a glance:

• Lower heating costs
• Greater comfort — no drafts or cold glass
• May be eligible for 30% federal tax credits for year 2025 (subject to annual caps; please consult your tax advisor for current eligibility and limits)
• Long-term value and quieter interiors

Understanding Energy Ratings (Made Simple)

Every efficient window is rated by two key numbers:

1️⃣ U-Factor → Keeps the heat inside

Measures insulation power. Lower = better. For New England, aim for 0.25 or lower (DUALLY WORKS systems reach as low as 0.17).

2️⃣ SHGC → Controls sunlight heat

Measures how much solar warmth enters through glass. In cold climates, a slightly higher SHGC (around 0.20) helps warm your home naturally.

How DUALLY WORKS Systems Perform

Feature	Standard Window	DUALLY WORKS Tilt & Turn Window
U-Factor	0.28 – 0.30	0.17 – 0.21
SHGC	0.20 – 0.25	0.18 – 0.23
Air Tightness	0.2–0.3 cfm/ft²	0.01 cfm/ft²
Glazing	Double-pane	Triple-pane, Low-E, argon-filled
Frame	Vinyl / wood	Multi-chamber PVC or thermally broken aluminum

Result: Up to 40% better insulation, whisper-quiet interiors, and longer lifespan with our hardware precision.

ENERGY STAR® 2025 Standards (Cold Climate)

Product	ENERGY STAR Target	DUALLY WORKS Performance
Windows	U ≤ 0.22 \| SHGC ≥ 0.17	U = 0.17 – 0.21 \| SHGC = 0.18 – 0.23
Patio Doors	U ≤ 0.26	U ≈ 0.20 – 0.24
Entry Doors	U ≤ 0.23 – 0.26	U ≈ 0.22 – 0.25

✅ Meets ENERGY STAR® Most Efficient 2025
✅ Qualifies for Federal Energy Tax Credit
✅ Certified under EN 14351 / ISO 10077

What It Means for You

Warmer rooms — even right next to the glass
• Lower utility bills every month
• Less noise from outside
• More comfort, year after year.Our windows are not just efficient — they feel different. The precision tilt-turn mechanism gives you flexible ventilation, secure locking, and a clean European aesthetic.

Installation Matters Too

Even the best window can underperform if installed incorrectly. That’s why we partner with qualified installers trained to handle our products — ensuring every seal, spacer, and frame performs exactly as designed.

Pro tip: Ask for airtight installation and warm-edge spacers for best performance.

Ready to Keep the Cold Out?

If you’re building or upgrading your home our tilt-turn systems offer unmatched comfort, beauty, and efficiency.

DUALLY WORKS is your local partner for:
• High-performance windows & doors
• Custom sizes and finishes
• Expert support and installation

Let’s make your home warmer, quieter, and more efficient this winter.

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