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Shower Waste Water IN
Cleaning
access
Shower Waste
Water OUT
Vert SHRU
Cold
pre-heated
mains
water OUT
Cold mains
water IN
1.0
Introduction
1. The Assure Vertical SHRU (Shower Heat Recovery Unit) is a
waste water heat recovery system (WWHRS) that recovers heat
from the warm waste water when taking a shower. It relies on the
waste water from the shower flowing through a heat exchanger
that pre-warms the mains cold water feed to a shower mixing
valve and combination boiler or hot water storage cylinder
2. The Assure SHRU system consists of a stainless steel 316L
exchanger and is supplied with the necessary fittings for
installation. It has been developed for dwellings with the
bathroom on the first or higher floor, so that when taking a
shower the waste water flows under natural conditions through
the heat exchanger installed on the floor below the bathroom.
Important: The Assure SHRU has been tested and approved to
the UK water regulations and the installation must be carried out
in accordance with:
• UK Water Regulations/Water Byelaws (Scotland)/Water supply
regulations (Northern Ireland)
• All current Building Regulations
• Health & Safety at Work Act 1974, Approved Code of Practice
and Guidance L8 (not applicable to private homes, some landlord
owned properties)
3. Energy Saving Performance Recognised by SAP - The
successful operation of the Assure SHRU which is a Waste Water
Heat Recovery System (WWHRS) – Instantaneous Shower Heat
Recovery Device, depends entirely upon the adherence to these
instructions. Additionally, for dwellings within the UK, recognition
of the system's energy saving performance within the National
Calculation Methodology (NCM) for the energy rating of
dwellings, known as the Standard Assessment Procedure (SAP)
requires that these instructions are complied with in conjunction
with a system design checklist and an installation checklist and
certificate of installation, supplied with this document and
available at: www.ncm-pcdb.org.uk/sap.
4. The system should be installed by a suitably qualified plumber,
with system design consideration being equally important to a
correct installation. For recognition of the Assure SHRU within
SAP, a system design checklist and an installation checklist and
certificate of installation should be completed and signed, with
copies kept for the home user pack (home owner), the installer,
and sent to Baxi at the post or e-mail address shown on the back
page. Building Control Officers may also request a copy. For the
purpose of system identification of product data without SAP, the
product will have an NCM (SAP) Identifier label permanently fixed
to the unit, whereby the 'model qualifier' states 'refer to
installation certificate, if unknown assume System B'. A second
NCM (SAP) Identifier label is also supplied and must be affixed to
a nearby boiler or service cupboard (the label must be visible for
inspection without disassembly of nearby products or systems)
and the 'model qualifier' states 'System A, System B or System C
delete as appropriate'.
Note:
i) The unit must be installed vertically and must self drain to the
trap downstream.
ii) Failure to install this unit correctly to system A, System B or
System C configuration diagrams will invalidate the guarantee
and may have an adverse effect on its efficiency.
iii) Not sending back the completed and signed system design
checklist, the installation checklist and certificate of installation to
Baxi will invalidate the guarantee.
iv) Manufacturer's instructions must NOT be taken in anyway as
over-riding statutory obligations.
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