Heat Producing Appliance Ventilation
In October 2010 the Building Regulations Part J changed – but some manufacturers still have not. The changes meant all ventilators for heat producing appliances should be tested by an accredited independent company for equivalent area. This is the air that actually passes through the product not (as previously) geometrical free area which is simply the measurement of the most restricted openings. The old style of measurement was felt to be less accurate due to the more modern designs of ventilator which tend to incorporate changes in shape, complex baffles and cowls which limit performance (air that can pass through).
If you look at the image above it’s easy to appreciate how simply measuring the gaps between the baffles would not be a true reflection of how much air actually flows through the vent as a complete system. That’s why it’s so important to purchase products which declare an equivalent area.
Being at the forefront of ventilation we realised this was the safest and most accurate way to measure airflow many years ago and have been publishing only equivalent areas for our boiler, stove and fire ventilators for over a decade.
Rytons are currently the only manufacturer to have products approved by HETAS and the BBA. We also have our own on-site testing facility for research and development of our products before sending them away for independent testing. Next time you go to purchase a ventilator for a fire, boiler or stove ask for the equivalent area to ensure you comply with current Building Regulations.
To view all the permanent ventilators in the HETAS Guide click here.
Rytons Heat Producing Appliance Ventilation Brochure is available to download by clicking here. For orders and enquiries contact 01536 511874.