From d1f7feb22a64b620092b4a80784300f37ebcf5e1 Mon Sep 17 00:00:00 2001
From: Matt Mitchell <matt.mitchell@nrel.gov>
Date: Sat, 24 Jan 2026 15:06:46 -0700
Subject: [PATCH] fix high slat angle idx

---
 src/EnergyPlus/HeatBalanceSurfaceManager.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/EnergyPlus/HeatBalanceSurfaceManager.cc b/src/EnergyPlus/HeatBalanceSurfaceManager.cc
index f60aeb20c13..31374ac2606 100644
--- a/src/EnergyPlus/HeatBalanceSurfaceManager.cc
+++ b/src/EnergyPlus/HeatBalanceSurfaceManager.cc
@@ -3271,7 +3271,7 @@ void InitSolarHeatGains(EnergyPlusData &state)
                                         Real64 ACosTlt = std::abs(Surface(SurfNum).CosTilt); // Absolute value of cosine of surface tilt angle
 
                                         int slatIdxLo = surfShade.blind.slatAngIdxLo;
-                                        int slatIdxHi = surfShade.blind.slatAngIdxLo;
+                                        int slatIdxHi = surfShade.blind.slatAngIdxHi;
                                         Real64 interpFac = surfShade.blind.slatAngInterpFac;
                                         auto const &dfAbsSlatLo = constructionSh.layerSlatBlindDfAbs(Lay)[slatIdxLo];
                                         auto const &dfAbsSlatHi = constructionSh.layerSlatBlindDfAbs(Lay)[slatIdxHi];