Enforce no waste heat for any technology that isn't both electricity-…

… and heat-producing

src/constraints/thermal_tech_constraints.jl

@@ -88,7 +88,15 @@ function add_heating_tech_constraints(m, p; _n="")
             end
         end
     end
-    # Enfore
+
+    # Enforce no waste heat for any technology that isn't both electricity- and heat-producing
+    for t in setdiff(p.techs.heating, p.techs.elec)
+        for q in p.heating_loads
+            for ts in p.time_steps
+                fix(m[Symbol("dvProductionToWaste"*_n)][t,q,ts], 0.0, force=true)
+            end
+        end
+    end
 end
 
 function add_heating_cooling_constraints(m, p; _n="")