MOLI windows are engineered for Climate Zone 2 — thermally broken aluminum, NFRC-certified performance ratings, and glazing built to keep desert heat where it belongs: outside.
Arizona reality
above 100°F in a row (2024 record)
faster warming vs. global average — urban heat island
of your home's cooling load comes through windows
Code compliance
Arizona adopts the IECC locally (often 2018 with amendments). Rated windows must carry an NFRC label; unrated products fall back to unfavorable code defaults. MOLI's desert-engineered lineup is specified to meet Climate Zone 2 maximum U-factor and SHGC — the strictest solar-heat cap applied across Arizona — so typical configurations satisfy prescriptive limits in zones 2–5.
| IECC zone | Representative AZ counties | Max U-factor | Max SHGC | Typical MOLI lineup |
|---|---|---|---|---|
| 2 | Maricopa, Pima, Yuma, La Paz, Pinal | ≤0.40 | ≤0.25 | Meets |
| 3 | Cochise, Graham, Greenlee, Mohave, Santa Cruz | ≤0.40 | ≤0.25 | Meets |
| 4 | Gila, Yavapai | ≤0.40 | ≤0.40 | Meets |
| 5 | Apache, Coconino, Navajo | ≤0.40 | ≤0.40 | Meets |
Maxima shown are 2018 IECC Table R402.1.2 (prescriptive residential). Cooler zones allow equal or looser SHGC than Zone 2; MOLI's Zone 2–aligned U-factor and SHGC therefore meet or exceed these ceilings when those values apply to your chosen product. Municipalities may adopt different editions or amendments.
The fix
Solar load and conductive frames push heat indoors even when cooling runs constantly.
MOLI fixLow-E insulating glass aligned with Arizona SHGC limits and thermally broken aluminum keeps heat outside.
Smoke, dust, and haboobs exploit loose seals and worn finishes — staying inside only helps when the envelope actually seals.
MOLI fixMulti-point hardware and consistent seals cut infiltration; powder-coated profiles shed grit and stand up to UV.
Heat and air leakage force harder cooling on utility peak windows — wear on equipment and steeper bills.
MOLI fixRated performance reduces cooling load so systems cycle normally instead of fighting the glass.
Air leakage
Tested air infiltration—not guesswork—when dust, smoke, and hot drafts push on your envelope.
Arizona 2018 IECC · Climate Zone 2
Phoenix · Scottsdale · Gilbert · Mesa · Tempe · statewide
Talk to MOLI — headquartered in Tempe.