IMPORTANT: Trouble shooting of heaters should only be carried out by qualified Gas Safe Engineers and Electricians. 

Radiant Heaters (Suspended Tube Heaters) Maximum 10 meters, reduce maximum length by 1 meter for every 90⁰ bend, and for every 45⁰ bend, reduce maximum length by ½ meter (Expample: adding a 90⁰ bend and a 45⁰ bend will reuce the maximum by 1½ meters, so the updated maximum length is 8½ meters)