Hoval UltraGas condensing gas
boilers are available in capacities
from 50 to 1000kW, while twin
UltraGas units offer outputs from
250 to 2000kW – complete with
common flue and optional
pipework/header kits.

Independent testing (to DIN EN
676) confirms the average NOx
emissions of the boilers to be less
than 40mg/kWh – achieving the
maximum BREEAM rating of three
points relating to NOx emissions.

Net efficiencies of up to
109.5% are also
achieved when tested
to the requirements
of the European
Boiler Efficiency
Directive, with CO
levels of 10mg/kWh.

Featuring Hoval’s
Ultra Clean
combustion system,
the boilers use a
modulating pre-mix down firing
burner with up to 6:1 turndown.