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Does anyone have experience of, or opinions about, Joule's new (in 2022) product, Modulair All-E, with GreenComfort and cylinder? It is an Exhaust Air Heat Pump supplying DWC and space heating, both via hot water to radiators and heating of air drawn into the building (with the 'Green Comfort' optional extra). So it combines DWC, space heating and MVHR in one unit - with a cost of around £7500. The target market seems to be primarily flats less than, say, 100m2. Source: https://joule.ie/modulair-all-e-product-page/ I'm aware of strong reservations on this forum (by Jeremy Harris, in particular - sad that he seems to be no longer contributing) about Exhaust AHP but this product seems to avoid the substance of those reservations since it draws external air into the building through ducting, along the lines of MVHR. As a self-builder of an almost Passive House, 77m2 on one level and almost open-plan, I'm attracted by the notion of killing three birds with one stone (DHW, space heating and ventilation). Modelling of plans by Warm consultants in Plymouth suggests a small heat load on cold days of 24Kwh over 24 hours. My main concern is around noise - the data supplied are thin and not convincing. And in the winter, the EAHP will have to circulate the greatest volume of air to extract the required heat input - the noise of which would be much less noticeable if it were an externally-sited ASHP. Any thoughts, much appreciated. Rodge

Hello, My father in law has installed all the pipework for out MVHR system and all we need is the unit itself, either a Q350 or Q500. We've had it on order for around 6months but are now being told it's not going to be here till September 2022! Does anyone know of places that might have them or alternatives? He is of the opinion that other makes can't be used. Thanks Paul

Trying to finalise my choice of MVHR unit. My main concern is to get something that is as quiet as possible. I know quietness is as much dependent upon the quality of the installation and where it is installed, and I think I have that covered in that I am hoping to install in the corner of my loft space, mounting the unit on an external brick wall, and that space is not adjacent to any bedrooms or living areas (it is just adjacent to a bathroom). But surely choice of unit plays a factor as well. Amongst my research I came across a Duco unit sold by BPC called the Ducobox Energy. What apparently makes this unique is that it has a two-zone system. BPC describe it as follows: A huge factor in the quietness of the system is that 2-zone system, as it reads where you are in your home and what needs ventilated you will not notice the system working. For example, at night, the unit will extract from areas such as your kitchen that are not being used, which ensures that the habitable rooms at that time such as bedrooms, will have no noise disruption. I had thought the best way of setting up the two-zone system would be for bathrooms, utility and kitchen to be zone 1 and the rest of the house to be on zone 2, as this would address my concern that whenever somebody had a shower or boosted to clear cooking smells, the unit's boost would be heard in the bedroom. We also run our tumble drier in the utility room overnight, so don't want the boost to kick in from that being heard in the bedrooms. However, on further research it appears that the zones need to be more "geographic", i.e. by location of the room rather than by its function. As the bathrooms are on the same floor as the bedrooms, segregating the bathroom ventilation from the bedroom ventilation probably isn't possible. It would however allow me to segregate the utility and kitchen from the bedrooms, so it would at least address part of my concern. Does anybody have any experience of this system?

Hello, We are building an end-terrace house. Its a 2 bed house with living space and kitchen on the ground, one bedroom on the first floor and one on second (loft conversion). The house has 2 x high voids from ground floor to the 2nd floor ceiling (sloping roof in the front and flat roof at the back). It was struggle to get our fire strategy approved, but we finally have it approved too. At present, we are building the concrete slabs and beams and bricks are on site. We have decided to hire Stroma for environmental checks who will initiate their works soon. Being a tech guy, I am too keen on having an eco-friendly house and feel fitting an MVHR will bring lots of benefits in terms of heat recovery, fresh air, more oxygen, etc. But am concerned on the requirements of having too many ducts and vents. Please feel free to answer on these questions for me to move more towards a firm decision: 1. To avoid having too many ducts running across the floor, can we fit the entire system on a single side-wall with all wall vents in the bathrooms and rooms at all levels? i.e. can we have a complete system without a ceiling vent? In worst case, we can have vents in the roof, but feel it will need a lot of ducts. 2. Would be be feasible to fit the main unit on ground floor? 3. What will be vastest cost effective small sized system which can send in oxygenated/healthy air and also have cooling functionality? Thanks, P

hi all, had a couple of quotes and the airflow is coming in at 1/3 the price of the zehnder, haven't heard of airflow. there is no mention on here so just wondering whether anyone had any experience