Radiant • Conventional • Gas Fuel
A J Wells and Sons
A O Smith
ACV
Alde
Alpha
Aquaflame
ARCA
Ariston
ATAG
Atlantic 2000
Atlantic Boilers
Atmos
Baxi
Baxi Heating
Baxi Potterton
Beeston
Benson Heating
Biasi
Boulter
Boxer
British / Scottish Gas
British Gas
British Gas/Scottish Gas
Broag Remeha
Buderus
Burco Maxol
Caradon Ideal
Chaffoteaux
Chaffoteaux et Maury
Charles Portway & Son
Claudio GR (Vokera)
Clyde
Coopra BV
Daikin
DD Heating
De Dietrich
De Dietrich Thermique
Dimplex
E.C.A.
Eco Hometec (UK)
Econoflame
EHC
Elco
ELCO Klockner Heiztechnik
Eurocal
Europa
EUROTERM
Evo
Express
Fagor Electrodomesticos S.Coop
Fer
Fer Industrie
Ferroli
Firebird
Firebird Enviromax
Fonderie Sime
Fondital
Fontecal
GAH Heating Products
GEM
Geminox
Gerkros
Gledhill
Glotec
Glow-worm
Grandee
Grant
Halstead
Heating World Group
Heatline
HEB Boilers
Hepworth Heating
Hermann Srl
Hoval
HRM
HRM Boilers
Husqvarna
Hyrdoline
i
i-mini
ICI Caldaie
icon Heating
Ideal
Ikon
Intergas
iQE
IRSAP
Itho Images bv
Jaguar
Johnson & Starley
Keston
Kidd VHE
Lamborghini
Lamborghini Caloreclima
Main
Malvern
Maxol
Merlin
MHS Boilers
Mikrofill
Mistral
Mistral Boilers
Morco
Motan
Myson Combustion Products
Navien
Nefit Buderus Ltd
Nova Florida
NST
Oceanspa
Optia
Parkray
Perrymatics
Potterton
Potterton International Heating
Potterton Myson
Potterton Myson Heating
Powermatic
Powermax
Pro
Protherm
Quantum
R H Ingham
Radiant
Ravenheat
Remeha
Rhino Savannah
Rinnai UK
ROC
Rotex
Sabre
Sarigas
Saturn
Saunier Duval
Scottish Gas
Servowarm
Sile SpA
sime
Sime Heating Products (UK)
Solarcombi
Strebel
Termet
The White Boiler Company
Thermeco
Thorn EMI Heating
Trianco
Trisave
Turco
Turkington Engineering
Unical
Vaillant
Viadrus
Viessmann
Vokera
Vokèra BY RIELLO
Warmflow
Warmworld
Wickes
Wolf
Worcester
Yorkpark
The Radiant RS 21 E/3S has a 80.4% efficiency rating.
The Radiant RS 21 E/3S is a Conventional boiler with a maximum power output of 26.6 - 26.6 (KW) that uses Gas as its fuel source.
This boiler will provide efficient heating and subsequently reduce fuel bills and carbon dioxide emissions. Potential annual savings compared to older boilers: £100-£250.
Why the Radiant RS 21 E/3S is an excellent choice for your home
80.4% efficiency rating for maximum energy savings
Reduce your energy bills by up to £100-£250 annually
Radiant quality with comprehensive warranty
Built to last with modern condensing technology
Discover other efficient boilers you might be interested in
Use our tools to calculate savings and compare boilers
Calculate your potential annual savings and CO₂ reduction with our free calculator.
Use CalculatorCompare different boiler models side by side to find the perfect match for your home.
Compare NowCheck if you're eligible for a free Radiant RS 21 E/3S boiler through the ECO4 scheme and start saving money on your energy bills.
