Nic

Top hinges outwards thanks

Hi timber frame ( triple glazed Norrsken windows ) attached on outside stud work. what sort of thermal bridging detail do I need to have / consider ? Is what’s shown enough?

I don’t know but they confirmed this to me this morning with no explanation

thanks for that but I’m not very high tech so although it might be a quick job for someone I don’t really know how to do that 🤷‍♂️ if someone can do it I’d appreciate it ( can pay 😁)

Hi any recommendation for a design service near Exeter for a new build based on a passive design. Two bed timber frame high insulation, airtight . Ground floor UFH and ashp, MVHR and solar to work together is the plan

What about how to raise outside to make outside at FF? And not cause any issues with damp cause

So at building regs drawing stage for a small timber framed house. Rendered outside, built with passive and airtightness in mind . Architect has listed this in the info on the ventilation? Any thoughts as I thought the MVHR did all the ventilation do I need all these extra things ? AD PART F Ventilation to be provided by designed MHVR system. In general: BACKGROUND VENTILATION In addition to natural ventilation, equal to 0.3 l/s per m' internal floor area (including 8000mm night vents), the whole building ventilation rate to be 19 l/s (one bedroom). The whole to be in accordance with Approved Document Part F. Kitchen and bathroom to have a mechanical vent with 100mm dia, ductwork to external air. Kitchen to have extraction equal to 60L/s (w/o cooker hood). Bathrooms to have extraction equal to 15L/s. Kitchen extract to be Expelair GXC6, or similar, with a 15 minute over run facility. Bathroom to be Expelair DX 2100, or similar, with a 20 minute over run wired to light switch. NOTE:All exposed vents to have fixed grills/hoods. A Positive Input Ventilation unit to be installed. Vent-axia wall mounted Posi-Dry Compact Pro (model 479188) with integral heating element. Duct form outside to PIV unit to be insulated. PURGE VENTILATION Minimum requirement is for 4 air changes per hour per room. All rooms to have openable window area equivalent to minimum 1/20th floor area for windows that open more than 30 degrees or 1/10th for opening 15 to 30 degrees. CONTROL OFVENTILATION Trickle vents are to be positioned min 1700mm above floor level, where possible, and installed in accordance with BS EN 13141-1 2004. Humidity detector to be fitted to Mechanical extraction. Installation and Commissioning Checklist to be completed by Competent and Qualified person and forwarded to Building Control.

Hi I’m at building regs stage of a small timber frame , passive based house in Devon. Draft drawing just arrived today. I think I would like the outside to be at internal FF level based on what has already been drawn , any ideas on best option based on drawing attached

Can I ask what fan coils you’re using please

Zehnder ComfoAir Flex250 …….Not the 350

Working together as a team ! I know a little about the above …but building a small 110m2 ( passive based) house see attached . I know what I’d like but can’t seem to find anyone who can design a whole system ( I get the “we only do ashp or we only do solar or only MVHR” etc) I’m going to be building in Devon . Anyone know someone who can look at it holistically and make sure everything works together? looking at a single zone for UFH ground floor ( primarily all open, so keep it simple) solar panels on the south side of the roof, to do electrical and DHW if required . I like the Panasonic ashp compact J type and the zhendar q 350 ( in a small loft) a DHW cylinder 180-210 size( three of us, two like baths) fan coils for bedroom? For summer cooling, cool the slab for downstairs in summer .internal dimensions are 9300mm x 6000 kitchen and utility have change slightly but no drawings yet for that we will have an insulated raft foundation and triple glazed probably blown cellulose planners were a pain in the !!! So we have what we have and need to work with it id be grateful for any recommendations on someone to look at this and make sure the builders ( or installers ) know what’s what and a plan to work to

thanks that’s great . We are only 110m2 split evenly over two floors ( two double en-suites upstairs) mostly open plan down stairs . So 6kW would be good ( three of us ) 👍🏼

So best option ashp for UFH ( and a bit of cooling) and DHW . MVHR to just do its thing , cylinder that has min3m3 coil and can run via ashp and solar and fan coils for bedrooms how do they work please?

Did they say why no cooling ?

Why not to bother with the MVHR to do some cooling ?

WC curve ?

Hi looking at an ASHP for a small ( total 110m2 two story build . I will need it just to run UFH on ground floor and DHW . But I’d like it to do cooling as well ? the how will be passive based , airtight well insulated etc probably 6kw or 8kw ( probably still over kill… not got calculations back from architects yet) will obviously need a DHW cylinder as well and will want to run in conjunction with solar panels on the roof… are certain ashp’s better at cooling as well as heating… sorry bit of a novice

Hi after some thoughts and opinions. building a small two en-suite two story house making it as passive as we can thermal raft airtight etc UFH likely to fit a Zehnder ComfoAir Q350 ( in first floor roof space… we are in Devon so the heating side of our property ( with the insulation, UFH, triple glazing etc) is not likely to be much of a problem 🤞🏼 my main thoughts are on cooling…. Space is limited, anyone know what the most effective way to go on this from the start? as I’d like to avoid having to retrofit something. I’m not likely to fit full blown air con unfortunately

hi have you got any further with this ? By the way what area are you in ?

I don’t know the answer to those questions but will check

Hi attached is the proposal for insulated raft for (passive principle) timber frame build of small new home. just getting some general thoughts on it to see if there are any areas which could be improved? Clay based soil and architect changed the original block and beam to this raft . I’m not a builder or after a passive certificate just want as airtight and thermally sound build on a budget 😁

Yes timber frame insulated raft built with passive principles

Thanks I have looked at several other options whilst waiting for planning and building regs drawings and seen lots of good and not so good options this just came through from the architects ( as I asked them if they had anyone they had worked with and had good results and happy with etc) so was just curious… I get your point just because someone had a good ( or bad) experience it doesn’t mean the next person will get the same ? Lots of variables) . Like I say was just getting any thoughts if someone had any dealings 👍🏼

Innate construction Ltd Honiton looking for a main contractor for my self build and my architect has recommended then ( assured me no links or financial links etc ) I will arrange to meet with them etc but just wondered if anyone on here might have dealt with them or know of them 🤷🏻‍♂️