Once you know your product or unit type and the model number, you can find specific support information for your situation:
Supporting documents & videos
General
- Who can I get to Design, Install, Service & Maintain Systems?
- Approved Document F – (Latest Version as from 15th June 2022)
- Previous versions of Part F
- Part F – Calculator (If downloading to a phone, it will require a spreadsheet application)
- DVCG (Domestic Ventilation Compliance Guide) DVCG – use in conjunction with approved document F 2010, this is now incorporated into Approved Document F 2021
MVHR/HRV
- Filter replacement videos
- How to purchase MVHR filters
- User Guides for HRV units
- Manuals for HRV units
- MVHR Running Costs
- Fault finding information – MVHR
- Catalogue pages for HRV units
- Spares Listing for HRV units
- Condensation Drain Requirements – Install Guide
- aura-t™ – Changing from being Integral to Remote
- aura-t™ – Commissioning Procedure (HMB & B Models)
- Handling Of Warranty Claims for HRV Units (UK)
- Volt Free Boost Wiring – MVHR
- Motor replacement videos for HRV1/1.25/1.35, HRV1.5-3 and HRV10/10M/10.25/10.25M
- Replacing PCB 40062 with PCB 40262 for HRV1, 1.5, 2, 2.5 & 3 Q Plus Units
- Port configuration and dimensions for HRV vertical and HRV Horizontal units
- HRV/MVHR Vertical Mounting Information
- Connecting a controller to a MVHR Unit
MEV/CME
- User Guides for CME units
- Manuals for CME units
- MEV Running Costs
- Fault finding information – CME
- Catalogue pages for CME units
- Spares Listing for CME units
- Handling of Warranty Claims for CME Units (UK)
- Volt Free Boost Wiring – CME
- WCME100 0r MVS8 with CME3 Q Plus or CME3.1 Q Plus – Upgrading
How does the system work?
How often do the filters require changing?
It is increasingly important to maintain the performance of your mechanical ventilation system. One of the ways to ensure that your system is operating correctly is by checking the filters within the unit. Filters should be replaced at least annually, or more regularly dependent on environmental conditions.
Are there different grades of filters?
Read more about filter classification here.
Changing filters and where to place different filter grades in my MVHR/HRV unit
Read the user guide "How to change your filters" here.
Who can I get to service / maintain the system?
See our preferred installers here.
Where do I buy filters from?
Visit our online shop here.
How does Summer Bypass work?
Summer Bypass is a function that is available on selected units, please check your manual to determine if you have this function.
In the normal running mode a MVHR unit will recover heat from the outgoing air, this heat is then passed to the incoming fresh air which is supplied into the habitable rooms (lounge, dining room, bedrooms etc.)
The temperature of the air coming into the unit is continuously monitored, once pre-defined* temperatures are reached the unit will switch to Summer Bypass. The unit automatically triggers internal grilles and/or flaps to divert the outgoing air around the heat recovery cell, meaning that the incoming air will no longer be warmed by the outgoing air. The unit will stay in Summer Bypass until the temperatures go below the pre-defined temperatures.
NB, if the unit is required to stay in Summer Bypass for prolonged periods the unit will periodically drop out of and go back into Summer Bypass.
*Some models allow the trigger temperatures to be changed.
Whilst the air will come directly from outside, it is probable that the temperature of this air will be slightly higher than the temperature outside, due to thermal gain whilst passing through the ventilation system.
On specific units there is a function that is linked to Summer Bypass, this being SummerBoost®. If available and enabled this will increase the fans speeds to increase air movement. Please check your manual to determine if you have the function and if so how to enable.
It is important to emphasise that a MVHR is a ventilation system and not a cooling system. Summer Bypass will stop heat being recovered but does not guarantee the ambient temperature in the property will be decreased.
Where Summer Bypass is not available Summer Mode may be, please check the manual to determine if you have the function.
Summer Mode enables the Supply fan to be switched off, meaning no pre-warmed fresh air is being supplied to the habitable rooms. If this function is utilised it is important that windows are left open to provide the fresh air.
How much power does the system consume?
Running costs to property, each unit is selected and set up according to the floor area of the property and the complexity of the ducting system. Therefore, we can only provide approx. costs.
It must not be forgotten that the unit will recover heat during the winter months, saving on the heating bills. It is generally accepted that the saving in heat bills is greater than the cost of running the system.*
Specific running cost figures can be found here.
* Please note this is for MVHR/HRV units only. NOT MEV or dMEV.
Can I connect an external controller to my MHVR unit?
Should the unit be running all the time?
Yes. These units are designed to run 24/7:
- For the health and comfort of the occupants.
- To control condensation.
- Remove pollutants.
- Ensure the safe and efficient operation of open-flue appliances.
The amount of fresh outdoor air should match the needs of the dwelling and the people living within it.
N.B. switching the unit off could lead to poor quality air within the building and may affect the fabric of the building and/or your health.
Can I turn the unit down?
The unit should not be turned down as it has been commissioned to meet the requirements within Approved Document F.
N.B. turning the unit down could lead to poor quality air within the building and may affect the fabric of the building and/or your health.
Can I turn the unit up?
The unit can be turned up, the unit will have been commissioned to meet the minimum requirements within Approved Document F, therefore increasing the rates is acceptable.
Flow rates may need to be increased for higher occupancy and life styles.
N.B. increasing the unit flow rates may result in an increase in noise.
Should the HRV system help cool my property?
It is important to emphasise that a HRV is a ventilation system and not a cooling system. Summer Bypass will stop heat being recovered but this does not guarantee the ambient temperature in the property will be decreased.
Should the HRV system heat my property?
It is important to emphasise that a HRV is a ventilation system and not a heating system. The heat cell with recover approx. 90% of the heat from the outgoing air and pass this heat to the incoming air to minimise heat loss.
Should HRV and CME systems be quiet?
It is inevitably the system will make some noise, as air is being moved by a fan(s) through a ducting system(s) 24/7. The level of noise is likely to vary from property to property. The system should have been designed, installed and commissioned to minimise the noise level.
If the noise is excessive then we would recommend having the system checked, there may be options to reduce the noise.
How often should the filters be changed (HRV only)
The frequency for changing the filters will vary depending upon a number of variables, these being occupancy level, lifestyles, pets, external conditions etc. Typically filters should be changed every 12 months.
N.B. as the filters become blocked the effectiveness of the unit will reduce, until no air is actually moved.
Does the system need maintaining?
HRV
The frequency for maintenance will vary depending upon a number of variables, these being occupancy level, lifestyles, pets, external conditions etc. Typically systems should be maintained every 12 months. This will include:-
- Replacing filters
- Cleaning the inside of the unit, no detergent should be used.
- Hovering the heat cell.
- Cleaning the ceiling terminals.
CME
The frequency for maintenance will vary depending upon a number of variables, these being occupancy level, lifestyles, pets, external conditions etc.
The ceiling terminals will need regularly cleaning. However the unit will only need dismantling and cleaning approximately every 5 years.
Periodically the ducting system may need cleaning and the flow rates checked.
Should there be a difference in sound between Continuous and Boost Settings?
Not always, the speed difference between Continuous and Boost may not be significant enough to have a determinable sound difference.
Basic fault finding
My unit has become noisy
- Has a boost switch been left on?
- Do the filters need replacing (HRV only)?
- Is the unit in SummerBoost mode (HRV only)?
- Has the noise locally to the unit changed?
- The fans may be failing.
My system changes is speed without the pushing a boost switch
- The unit may be triggering on humidity (where fitted).
- The SummerBypass is active and the unit is in SummerBoost (some MHVR units only).
My unit is now permanently in boost
- Has a boost switch been left on?
- Do the filters need replacing (HRV only)?
My unit has become noisy
- Has a boost switch been left on?
- Do the filters need replacing (HRV only).
- Is the unit in SummerBoost mode (HRV only)?
- Has the noise locally to the unit changed?
- The fans may be failing.
My unit has stopped running
- Has the unit been switched off at the mains spur?
- Has the mains fuse blown?
Water is dripping from my unit (HRV only)
- The install of the unit requires checking, it is probable that the ducting is not insulated fully or the condensation drain is not fitted correctly?
- The internal condensation tray is split?
The ceiling around my supply ceiling terminals is getting dirty (HRV only)
The filters require changing.
The air coming into the habitable rooms from the HRV System is cold
The air may feel cool but in reality is warm, measure the temperature, it should be slightly colder than the air being extracted from the kitchen & wet rooms. Try measuring.
The ceiling around my supply ceiling terminals is getting dirty (HRV only)
The filters require changing.
The air within the bathroom or kitchen is no longer clearing or it is taking longer to clear
- Are you using the boost switches?
- Are the filters blocked (HRV only)?
How can I claim against the warranty?
If the unit has been purchased by you directly from Titon then please contact us directly.
Most units are purchased by an installer appointed by the developer. We provide the purchaser with a warranty. They will then provide the developer and therefore you a warranty for the system. In the event that the unit is felt to be faulty the purchaser must be contacted, in the event they need to claim on our warranty they will then contact us directly.