Investigation of the MHI Q-Ton Heat Pump

Investigation of the MHI Q-Ton Heat Pump

The scope of this investigation covers the water hygiene / Legionella performance of the Mitsubishi Heavy Industries (MHI) Q-Ton Heat Pump.

The purpose of this report is to consider whether the Q-Ton Heat Pump represents a water hygiene risk equivalent to ALARP (As Low As Reasonably Practicable) for the three susceptibility groups – general public, healthcare/elderly/health compromised and immunocompromised.

The investigation methods were interview, inspection of a unit on a trial site, inspection of documents and literature search.

This report is focussed on the “re-heating of circulation loop” configuration, because the majority of the market would fall into this category and because recirculating systems have a higher potential inherent risk compared to single pipe systems.

The water hygiene risk factor of relevance to the Q-Ton relative to other competitor technologies is “amplification” i.e. multiplication of micro-organisms, which this report considers.

The Q-Ton could represent ALARP in water systems serving populations of any susceptibility, subject to appropriate design, installation, commissioning, monitoring and maintenance.

One feature of the Q-Ton system which could be considered superior to other systems, is the option to store water at 90oC or 75oC, which provides an environment which is very adverse for micro-organisms.

It is important for MHIAE not only to control the inherent risk associated with its Q-Ton unit, but also to control and influence the risks associated with its installation, commissioning, monitoring and maintenance.

Download the full report by clicking on the "Catalogues" tab below.

Add to Project Board

Create a new project board:


Mitsubishi Heavy Industries Air-Conditioning Europe Ltd

Mitsubishi Heavy Industries manufactures more than 700 different product ranges for various industrial and civil markets across the world. As an engineering company, they have a long history in the design and manufacture of refrigeration systems...
View company profile
T0207 025 2750
F0207 025 2751
Eenquiries@mhiae.com
WVisit Mitsubishi Heavy Industries Air-Conditioning Europe Ltd's website
 7 Roundwood Avenue, Stockley Park, Uxbridge, Middlesex, UB11 1AX

Make an enquiry to Mitsubishi Heavy Industries Air-Conditioning Europe Ltd

You may also be interested in this related Case Study: LG Heating for Gosport ice rink Read Now