Profile: Gunning Heating Ltd. specializes in domestic trench heating and high output tubular radiators. Our tubular radiators are small in size but high in output, and are an alternative to conventional wall radiators. Gunning tubular radiators are compact, low level heating units. They are suitable for use in conservatories, bathrooms, and in front of glazed areas, and where wall height is at a premium. Gunning gilled tube provides the perfect all-purpose extended surface heat transfer medium of great strength to withstand all nominal system temperatures and pressures.