diff --git a/elements/energie/solaire/base_ecs/ballon_ecs_elec.elmt b/elements/energie/solaire/base_ecs/ballon_ecs_elec.elmt
deleted file mode 100644
index 410816400..000000000
--- a/elements/energie/solaire/base_ecs/ballon_ecs_elec.elmt
+++ /dev/null
@@ -1,23 +0,0 @@
-<definition width="120" version="0.3" hotspot_x="60" hotspot_y="90" height="180" type="element" orientation="dyyy">
-    <names>
-        <name lang="en">Tank ecs</name>
-        <name lang="fr">Ballon ECS electrique</name>
-        <name lang="cs">Elektrická jímka ECS</name>
-        <name lang="pl">Zbiornik elektryczny CWU</name>
-    </names>
-    <informations></informations>
-    <description>
-        <input x="-43" y="-18" size="9" rotate="true" text="Ballon&#xa; ECS"/>
-        <polygon style="line-style:normal;line-weight:normal;filling:none;color:black" x1="0" x2="-10" x3="9" x4="-10" antialias="false" x5="10" x6="-10" x7="10" x8="-11" x9="10" closed="false" y1="82" y2="70" y10="30" y3="65" y11="30" y4="60" y12="30" y5="56" x10="-10" y6="50" x11="2" y7="45" x12="2" y8="40" y9="35"/>
-        <rect width="11" x="41" y="10" antialias="false" height="1" style="line-style:normal;line-weight:normal;filling:none;color:black"/>
-        <rect width="1" x="-31" y="60" antialias="false" height="25" style="line-style:normal;line-weight:normal;filling:none;color:black"/>
-        <rect width="1" x="29" y="-80" antialias="false" height="20" style="line-style:normal;line-weight:normal;filling:none;color:black"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-60" x1="50" y2="70" x2="50"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="none" style="line-style:normal;line-weight:normal;filling:none;color:black" y1="-59" x1="-50" y2="70" x2="-50"/>
-        <arc width="100" x="-50" y="57.5" antialias="true" height="25" style="line-style:normal;line-weight:normal;filling:none;color:black" start="0" angle="-180"/>
-        <arc width="100" x="-50" y="-72.5" antialias="true" height="25" style="line-style:normal;line-weight:normal;filling:none;color:black" start="-180" angle="-180"/>
-        <terminal x="-30" y="84" orientation="s"/>
-        <terminal x="30" y="-80" orientation="n"/>
-        <terminal x="51" y="10" orientation="e"/>
-    </description>
-</definition>
diff --git a/elements/energie/solaire/base_ecs/qet_directory b/elements/energie/solaire/base_ecs/qet_directory
deleted file mode 100644
index 69c60faa9..000000000
--- a/elements/energie/solaire/base_ecs/qet_directory
+++ /dev/null
@@ -1,7 +0,0 @@
-<qet-directory>
-    <names>
-        <name lang="fr">schéma de base ECS</name>
-        <name lang="cs">Základní nákres ECS</name>
-        <name lang="pl">Układy podstawowe CWU</name>
-    </names>
-</qet-directory>
diff --git a/elements/energie/solaire/base_ecs/rechauff_ecs.elmt b/elements/energie/solaire/base_ecs/rechauff_ecs.elmt
deleted file mode 100644
index 565877936..000000000
--- a/elements/energie/solaire/base_ecs/rechauff_ecs.elmt
+++ /dev/null
@@ -1,23 +0,0 @@
-<definition width="100" version="0.3" hotspot_x="40" hotspot_y="50" height="100" type="element" orientation="dyyy">
-    <names>
-        <name lang="en">ECS Réchaufeur tubular</name>
-        <name lang="fr">Réchaufeur ECS tubulaire</name>
-        <name lang="cs">Trubkový ohřívač ECS</name>
-        <name lang="pl">Grzejnik rurowy CWU</name>
-    </names>
-    <informations></informations>
-    <description>
-        <input x="46" y="36" size="6" rotation="270" rotate="true" text="Echangeur ECS"/>
-        <line length1="1.5" length2="1.5" antialias="false" end1="none" end2="simple" style="line-style:dotted;line-weight:normal;filling:none;color:black" y1="35" x1="0" y2="-37" x2="0"/>
-        <circle x="-30.5" y="-31.5" antialias="true" style="line-style:normal;line-weight:normal;filling:none;color:black" diameter="3"/>
-        <rect width="2" x="-1" y="40" antialias="false" height="7" style="line-style:normal;line-weight:normal;filling:none;color:black"/>
-        <rect width="2" x="-1" y="-47" antialias="false" height="6" style="line-style:normal;line-weight:normal;filling:none;color:black"/>
-        <ellipse width="60" x="-30" y="-45" antialias="true" height="90" style="line-style:normal;line-weight:normal;filling:none;color:black"/>
-        <polygon style="line-style:normal;line-weight:normal;filling:none;color:black" x1="-30" x2="20" x3="-20" x4="20" antialias="true" x5="-20" x6="20" x7="-30" x8="-30" closed="false" y1="-30" y2="-30" y3="-14" y4="0" y5="16" y6="30" y7="30" y8="30"/>
-        <circle x="-30.5" y="28.5" antialias="true" style="line-style:normal;line-weight:normal;filling:none;color:black" diameter="3"/>
-        <terminal x="-29" y="30" orientation="w"/>
-        <terminal x="-29" y="-30" orientation="w"/>
-        <terminal x="0" y="46" orientation="s"/>
-        <terminal x="0" y="-46" orientation="n"/>
-    </description>
-</definition>