The two numbers that matter
U-factor
How much heat flows through the window. Lower is better, especially for winter.
SHGC
Solar heat gain coefficient — how much sun heat gets through. Lower helps on hot west and south walls.
Both numbers are printed on the window's NFRC label. ENERGY STAR certifies windows by climate zone; Albuquerque falls in the north-central zone, which is the standard PNM uses for its rebate.
Where the energy goes
- Single-pane and aluminum-frame windows lose and gain heat fast
- Gaps around old frames let in air and dust
- Unshaded west glass heats rooms every afternoon
Installation counts
A well-rated window installed with gaps around it won't perform. We insulate around each frame with low-expansion foam and seal the interior and exterior so the opening is tight.
Money back
- PNM rebate: $80 per qualifying ENERGY STAR window, up to 10, for 2026 purchases while funds last
- New Mexico tax credit: up to 50% of cost, max $500 per window or door, with higher amounts for low-income households
We give you the product details and invoices you need to apply. Call (505) 616-3368.
Common questions
How much will new windows save on my bills?
It depends on what you're replacing, your home and how you heat and cool. Going from single-pane aluminum to good dual-pane low-E usually makes the biggest difference, especially in comfort.
Are triple-pane windows worth it here?
For most Albuquerque homes, good dual-pane low-E is the sweet spot. Triple-pane can make sense for noise or very cold sites in the East Mountains.