IMPORTANT: Troubleshooting of heaters should only be carried out by qualified Gas Safe Engineers or Electricians. 

Cabinet Heaters (Floor-Standing) Maximum 8 meters, reduce maximum length by 1 meter for every 90⁰ bend, and for ever 45⁰ bend, reduce maximum length by ½ meter (Example: adding a 90⁰ bend and a 45⁰ bend will reduce teh maximum by 1½ meters, so the updated maximum length is 6½ meters)