4
STRATA1
2.0 product
description
The Strata 1 range of wall mounted gas fired condensing boilers are state of the art appliances which
include a comprehensive range of features. The appliance must only be used on sealed and pressurised
systems. System design must take into account the boiler operating
∆
t of 20°C.
wall mounted with compact dimensions
At 900H x 458W x 435D, the Strata 1 boiler provides maximum heat from minimum dimensions
without compromising serviceability.
fully modulating heat output
The output of the boiler is fully variable, sliding between (approx.) 20% to 100%, which automatically
and instantly adjusts to match the needs of the system. The percentage of power at any given time can be
dictated by either outside air temperature, flow temperature, return temperature, stored domestic hot
water temperature, or room temperature, or a combination of the aforementioned.
fully condensing stainless steel heat exchanger
The Strata 1 boiler is designed with extended heat exchange surface area and is fabricated from
corrosion resistant long-life stainless steel. The unique Spiranox heat exchanger will return operating
efficiencies from 86% gross (96% nett) at 60°C return temperature, up to 97% gross (107% nett), at 30°C
return temperature.
extremely low harmful emissions
The boiler utilises 100% pre-mix gas/air fed at positive pressure to the metal fibre sheathed radiant
burners. The combustion system incorporates internal flue gas re-circulation and this combined with the
precise nature of pre-mix fuel/air control, gives ultra low emissions to satisfy the most stringent emission
regulations in the world currently. That is: < 20mg/kWh NOx (14 ppm DAF) and < 14mg/kWh CO (13
ppm DAF). The fully modulating nature of the appliance also reduces emissions by avoiding repeated
start/stops and the associated increase in emissions, which occurs with burner on/off cycling.
accurate variable burner output control
The pre-mix burner fans have low voltage direct current drive motors with pulse relay counting. This
system allows precise control over fan speed/combustion air volumes. Coupled with a gas valve system set
to provide proportionately measured volumes of fuel to air, which allows extremely accurate and instant
variable burner output control to be achieved.
energy saving
In addition to the extremely efficient burner and heat exchanger system employed in the Strata 1, each
appliance includes modulating speed boiler primary pumps.
This feature allows the boiler to self-maintain a 20°C
∆
t across the heat exchanger, optimising the heat
exchanger efficiency and reducing also the electrical consumption of the pump motors. The result is a
seasonal increase in boiler efficiency of a further 7-10% and a reduction in pump electricity consumption of
up to 70%.
