The commercial range of Keston wall mounted gas condensing boilers
covers outputs from 11kW to 110kW with single boiler units. As with all
Keston boilers, each has an extremely high efficiency performance of up
to 98% (GCV).
Despite their powerful outputs each unit is designed for wall mounting.
Keston Boilers offer complete and cost effective solutions to commercial
and industrial heating and in all installations, can offer the highest quality
systems. These are very often at much lower costs than a single
commercial boiler of equivalent output.

How it works
The Keston uses a high powered
combustion blower to deliver a
premix of gas and air to a downward
firing burner in a high efficiency single
pass heat exchanger. The heat
exchanger is made from highly
corrosion resistant stainless steel in
corrugated cross-flow sections. Hot
combustion gases pass across the
tubes providing heat to the water
system.
A modulating shunt pump, integral to
the appliance, will ensure the heat
exchanger receives the correct water
flow when firing and operates at
optimum efficiency.
Keston boilers are of low mass and
low water content giving a rapid
response when there is a call for heat.
The design, with its single pass heat
exchanger, avoids the complications
associated with other condensing
boilers. The unit is totally room sealed
and requires no ventilation for
combustion air to the room or
compartment in which it is installed.
Keston commercial boilers are
exceptionally easy to install and
maintain. Pre-fabricated multiple boiler
assemblies are available as an option
to assist speedy installation. They are
completely environmentally sound
with negligible NOx emissions (Class
5 rated) and can save 30% on the
heating bill.