Dorchester DR-LA atmospheric water heater with horizontal flue connection simplifies installation in replacement projects
Multiple-tube, direct fired atmospheric water heater for domestic hot water.

13 models available with continuous outputs (@44°C ∆T) of 620, 819, 964, 1197, 1425, 1836 & 2103 (DR-LA only) l/h.
  • Power outputs 31-107kW (DR-LA) and 31-93kW (DR-LP) 
  • Storage capacities of 264-324 litres.
  • Easy fit replacement water heater reduces installation costs.
  • Safe and clean domestic hot water generation.
  • Easy access for service and maintenance.
  • Flexibility in system design with choice of flue take off position.
  • Compatible with most existing atmospheric flue designs.
  • Choose from fully automatic ignition with flame detection (DR-LA) or permanent pilot with thermocouple (DR-LP).
  • Natural gas and lpg water heater options
  • Full project assistance with hot water sizing and selection of equipment to match the application.
  • Extensive back up and support from our team of experienced engineers across the UK.
  • Ask us about this atmospheric water heater, ideal for the replacement market.
  Title Type Size  
Dorchester DR-LA and DR-LP water heater brochure Dorchester DR-LA and DR-LP water heater brochure Product brochures 1806 kB Download
Dorchester DR-LA and DR-LP water heater dimensions Dorchester DR-LA and DR-LP water heater dimensions Dimensions 104 kB Download
Dorchester DR-LA and DR-LP water heater technical data table Dorchester DR-LA and DR-LP water heater technical data table Data tables 44 kB Download
Dorchester DR-LA installation manual Dorchester DR-LA installation manual Installers guides 3295 kB Download
Dorchester DR-LP installation manual Dorchester DR-LP installation manual Installers guides 1453 kB Download
Dorchester DR-LA seasonal efficiency sheet Dorchester DR-LA seasonal efficiency sheet Seasonal efficiency sheets 86 kB Download
Dorchester DR-LP seasonal efficiency sheet Dorchester DR-LP seasonal efficiency sheet Seasonal efficiency sheets 86 kB Download
Dorchester DR-LA 30 front view Dorchester DR-LA 30 front view CAD 15 kB Download
Dorchester DR-LA 30 plan view Dorchester DR-LA 30 plan view CAD 17 kB Download
Dorchester DR-LA 40 front view Dorchester DR-LA 40 front view CAD 15 kB Download
Dorchester DR-LA 40 plan view Dorchester DR-LA 40 plan view CAD 10 kB Download
Dorchester DR-LA 45 front view Dorchester DR-LA 45 front view CAD 15 kB Download
Dorchester DR-LA 45 plan view Dorchester DR-LA 45 plan view CAD 15 kB Download
Dorchester DR-LA 60 front view Dorchester DR-LA 60 front view CAD 16 kB Download
Dorchester DR-LA 60 plan view Dorchester DR-LA 60 plan view CAD 15 kB Download
Dorchester DR-LA 75 front view Dorchester DR-LA 75 front view CAD 15 kB Download
Dorchester DR-LA 75 plan view Dorchester DR-LA 75 plan view CAD 16 kB Download
Dorchester DR-LA 95 front view Dorchester DR-LA 95 front view CAD 15 kB Download
Dorchester DR-LA 95 plan view Dorchester DR-LA 95 plan view CAD 15 kB Download
Dorchester DR-LA 110 front view Dorchester DR-LA 110 front view CAD 14 kB Download
Dorchester DR-LA 110 plan view Dorchester DR-LA 110 plan view CAD 16 kB Download
Dorchester DR-LP 30 front view Dorchester DR-LP 30 front view CAD 14 kB Download
Dorchester DR-LP 30 plan view Dorchester DR-LP 30 plan view CAD 10 kB Download
Dorchester DR-LP 40 front view Dorchester DR-LP 40 front view CAD 14 kB Download
Dorchester DR-LP 45 front view Dorchester DR-LP 45 front view CAD 14 kB Download
Dorchester DR-LP 45 plan view Dorchester DR-LP 45 plan view CAD 10 kB Download
Dorchester DR-LP 60 front view Dorchester DR-LP 60 front view CAD 14 kB Download
Dorchester DR-LP 60 plan view Dorchester DR-LP 60 plan view CAD 10 kB Download
Dorchester DR-LP 75 front view Dorchester DR-LP 75 front view CAD 14 kB Download
Dorchester DR-LP 75 plan view Dorchester DR-LP 75 plan view CAD 10 kB Download
Dorchester DR-LP 95 front view Dorchester DR-LP 95 front view CAD 14 kB Download
Dorchester DR-LP 95 plan view Dorchester DR-LP 95 plan view CAD 10 kB Download
Dorchester DR-RS 85 front view Dorchester DR-RS 85 front view CAD 13 kB Download
Dorchester DR-LP water heater wiring diagram Dorchester DR-LP water heater wiring diagram Wiring diagrams 102 kB Download
Dorchester DR LA water heater wiring diagram Dorchester DR LA water heater wiring diagram Wiring diagrams 117 kB Download
  • Easy fit replacement for refurbishment projects
  • Medium sized commercial and public buildings including schools, hospitals, offices and hotels
  • Large commercial and public buildings including schools, hospitals and hotels
  • Locations with substantial and continuous hot water demands including hospitals, hotels and sports facilities.
  • To see where Dorchester atmospheric water heaters have been used visit the case study section of our website.
  • Unvented water supply kit - essential for any unvented application and includes an expansion vessel sized for the water heater and local pipework only.
  • Electrical anode protection
  • Flexible replacement anodes
  • Choice of flue take-off: 45° angled or horizontal position for ease off integrating with existing flues. Please specify when ordering.
  • Choose from a wide range of service contracts to help maintain optimum performance.