The Keston Qudos 28 offers today’s domestic market the ultimate in tomorrow’s
technology. A range of fully modulating gas condensing boilers with advanced yet
simple integral controls that provide a suite of options for the user/installer to
select to ensure optimum performance is delivered at all times. For ultimate
performance optimising, the Qudos 28s also features an integral speed-controlled
pump to ensure water flow rate and burner rate are perfectly matched.
The Qudos 28 units feature an integral control system for 'auxiliary energy' such as
solar thermal, thereby providing a 'future proof' solution. This ensures seamless
integration of the renewable energy source with the high efficiency boiler operation
to maximise the energy efficiency benefits available.
The Qudos 28s has dimensions of H700 x W435 x D280 and weighs 43kg. It can be
sited virtually anywhere - even in a standard kitchen cupboard if required, with no
compartment ventilation.
Use The Tabs To View Information About The Keston Qudos Boiler
- SEDBUK A rated
- 50mm muPVC flue system as expected from Keston Boilers Ltd (NB BSEN1566-1 (pipe) and BSEN1329 (fittings)).
- Attractive LCD user display indicating full product operation status at all times
- No compartment ventilation due to the very low casing temperatures
- Two stage frost protection
- System pump and fan exercise during extendedperiods of inactivity
- Full diagnostics and information display
- Lockout "avoidance" technology to prevent nuisance lockouts
- Fully programmable setting . can be tailored to each individual users needs
- Logging of historical data
- Optional back frames for routing pipes behind boiler
- Natural and LP Gas models
- Integral Solar Controller for direct control of auxiliary energy such as solar thermal
- Keston Dual Stat facility allowing two different operating temperatures depending upon the source of the demand
- Opentherm control connection for intelligent room control
- 0.10V DC input control for BMS connection controls
- Facility for hot water modulating control and legionella protection
- Weather compensation
Site the unit where convenient, connect to the radiators or the underfloor heating system, all hot and cold services and the gas supply.
Connect 230V permanent electrical supply into a switched fused spur box fitted on the unit and finally connect to any choice of 230V AC room thermostat.
All servicing is from the front and the water cylinder is fitted with a 3kW (21/4") immersion heater as backup. As with all Keston boilers, the Qudos 28s carries the Energy Efficiency logo*.
Model |
28S (Systems) |
Cabinet Height |
700mm |
Cabinet Width |
435mm |
Cabinet Depth |
280mm |
Top Clearance |
150mm |
| Side Clearance |
5mm |
Base Clearance |
200mm |
|
300mm |
| Weight (Full) |
47kg |
| Weight (Empty) |
43kg |
| IP Rating |
IP20 (IPX0) |
Model |
Gas Version |
LPG Version |
| Max CH Input |
29.4 kW / (100,300 BTU/H)
|
27.8 kW / (94,850 BTU/H) |
Max Output to Water (80/60C Flow/Return) |
26.4 kW / (90,500 BTU/H) |
25.5 kW / (87,000 BTU/H) |
| Max Output to Water (50/30C Flow/Return) |
28.4 kW / (96,900 BTU/H) |
28.4 kW / (96,900 BTU/H) |
| Min. Output to Water (80/60C Flow/Return) |
7.0 kW / (24,900 BTU/H) |
7.8 kW / (26,600 BTU/H) |
| Max Gas Cons After 10 mins |
0.76/(96.6) |
0.35/(45.0) |
| Max Operating Flow Temp. |
82°C |
82°C |
| Max Pressure (Sealed System) |
2.5 Bar |
2.5 Bar |
| Inlet Gas Pressure |
20 mbar |
20 mbar |
| Electrical Supply |
230V / 50Hz |
230V / 50Hz |
| Type of Gas |
G20 Nat |
Gas G31 LPG |
| SEDBUK Efficiency |
91.1 % (A) |
93.1 % (A) |
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