Guide collection
Radiator buying guides
Understand room heat loss, watts, BTU, panel types and system temperatures before choosing a radiator.
Type 21 vs Type 22 radiators: depth, output and room fit
Compare radiator panels, convectors, projection and output at matching conditions, then check wall space and the intended heating temperatures.
Read guideRadiator Delta T explained: worked low-temperature examples
Calculate radiator Delta T from flow, return and room temperature, and apply manufacturer correction data without confusing output and heat loss.
Read guideWhat size radiator do I need? Bedroom and living-room examples
Separate room heat loss, rated radiator output and usable wall space, with transparent bedroom and living-room examples and an installer brief.
Read guideRadiator BTU explained: watts, conversions and product ratings
Convert watts and BTU per hour, read exact catalogue rows, compare mixed-unit shortlists and distinguish unit conversion from temperature correction.
Read guideVertical vs horizontal radiators: output, wall space and fitting
Compare exact radiator output at matching conditions, then assess wall width, height, projection, furniture, connections and installation scope.
Read guideReady to build your shortlist?
Answer the focused quiz and compare products matched to your needs.