diff --git a/Dom/kaloryfer_wiatraki.scad b/Dom/kaloryfer_wiatraki.scad
index 448f2ab..55b7a86 100644
--- a/Dom/kaloryfer_wiatraki.scad
+++ b/Dom/kaloryfer_wiatraki.scad
@@ -4,39 +4,48 @@ include <NopSCADlib/vitamins/screws.scad>
 include <NopSCADlib/vitamins/fan.scad>
 include <NopSCADlib/vitamins/fans.scad>
 
+// ------- VARIABLES BEGIN -------------
+
 // 1 - straight section
 // 2 - fan section
 // 3 - blind end section
-model = 1;
-fan_down = false;
-conn = true;
-center_fan_hole = true;
+model = 2;
+fan_down = false; // the direction the fan adapter should be moved in relation to the radiator 
+conn = false; // connecting tabs
+center_fan_hole = false; // for model 1; an additional hole for a fan
 
 // północny kaloryfer w dużym pokoju - 42, 97, 7.5
+// południowy kaloryfer w dużym pokoju - 60, 97, 7.5
 h = 60; // total height
-w = 97; // górna kratka na kaloryferze
-lip = 7.5;
+w = 97; // inner width 
+lip = 7.5; // height of lip for radiator overlap
 
-l = model != 1 ? 70 : 180; // 18cm druk, 5cm adapter do wiatraka
+l = model != 1 ? 70 : 180; // 18cm for model 1, 7cm for others
 
-t = 2;
-fan_t = 5;
+t = 2; // wall thickness
 
+// chamfers
 ch_top = 6;
-ch_bottom = 10;
+ch_bottom = 10; // lip chamfer size for radiator support
 
+// connecting tab size
 conn_t = 2;
 conn_l = 20;
 
-fan_dist = 75;
-fan_width = 85;
-fan_t = 5;
+// fan adapter settings
+fan_spec1 = fan80x25; // model 1
+fan_spec2 = fan80x25; // model 2
+fan_dist = 75; // distance to the main channel body in model 2
+fan_width = 85; // model 2 - size of the box containing the fan cutout
+fan_t = 5; // model 2 - thickness of adapter
+
+// ------- VARIABLES END -------------
 
 // main body
 difference() {
     up(h/2) cuboid([w+2*t,l,h]);
     up(h/2 - t) cuboid([w,l+1,h]);
-    if(center_fan_hole && model == 1) {up(h/2) fan_holes(fan80x25);}
+    if(center_fan_hole && model == 1) {up(h/2) fan_holes(fan_spec1);}
 }
 // chamfers
 union() {
@@ -67,7 +76,7 @@ if(model == 2) {
     back(l/2 + fan_dist) up(fan_width/2) down(tmp_h) union() {
         difference() {
             cuboid([fan_width, fan_t,fan_width]);
-            xrot(90) fan_holes(fan80x25);
+            xrot(90) fan_holes(fan_spec2);
         }
         chain_hull() {
             up(fan_width/2 - t/2) fwd(fan_t/2) yrot(90) cyl(h=fan_width, d=t);