The Impetus range comprises three highly energy efficient wall-hung models, providing flow rates from 13.7 to 25 litres per minute at 35°C temperature rise.

Very rapid response times, low water content and a fully modulating pre-mix burner with 8:1 turndown means output closely matches demand, keeping energy use and carbon emissions to a minimum. This helps Impetus heaters achieve efficiencies as high as 96 percent (gross CV) and all three models are, therefore, ‘A’ rated under the European Eco Design Energy Label rating system.

Impetus heaters are extremely quiet in operation and, because they produce very low NOx emissions of 29 mg/kWh or less, they are particularly suitable for applications subject to BREEAM assessment.

They work particularly well when installed alongside solar thermal installations to provide ‘top up’ hot water when solar input is low or at times of peak hot water demand.

Robustly built, the Impetus heaters employ a 316 titanium stainless steel heat exchanger and are capable of working with water pressures up to 10 bar.

To ease installation, they can be supplied with multiple flue options for maximum siting flexibility. They can also be adapted to work as part of an unvented system and a condensate neutralisation kit can also be fitted if required.

Lochinvar managing director David Pepper commented: “This is an important diversification for Lochinvar. We built our reputation with larger systems and are more associated with commercial building services solutions. However, with this product we can now take our tried and tested fully condensing water heater technology into the growing residential and small commercial sector.

He concluded: “Modern standards of insulation and airtightness have reduced the demand for space heating in new build and refurbished homes and offices. This increases the importance of ensuring hot water supplies come from renewable and/or highly energy efficient sources. Impetus is perfectly designed to slot into this growing market.”