MickD

So instead of ducting into the AEHR and the MVHR just have it ducting into the house then let the MVHR and AEHR do their normal thing... as the heat will recovered anyway in the envelope of the house... So just use some basic fan on a thermostat that sends it back into the house... Love the idea of the filters... What about the summer months I was thinking the MVHR would be on bypass mode and just chuck it out the house... Would the house MVHR do the same also as its venting the house? Thank you. Mick

I am also thinking about the adjustment in air temperatures because of the cabinet and flow through the warm house... Would there be any, I get that it will contribute 0.2%, but because of the input fromqoutside running through a cabinet inside would there not be an increase in air temperature? Lets say outside was 10c but because the air moving through the house into the cupboard and then into the exhaust intake at the top would there be no increase in temperature that is useful to the AEHR ? there is massive difference in heating times based on AEHR temperatures. And it would keep the equipment cool which has a value massively above the MVHR and the AEHR... Thanks for the replies. Mick

this is another great point, the heat build up that I have in my current rack (35C-40C) I'm guessing is a build up of the heat over a time, and with effective extraction this would therefor be much less heat because its not stale air in the cupboard. correct me if wrong - which would also mean the cupboard with effective air flow would not do much for heating because its a very small amount being actually generated by the equipment, just feels like allot because of the buildup happening over time. Thank you

Hi Nick, Thank you for your reply. Correct, the cylinder is a EAHR. This is exactly the kind of information I am after, Dust, bugs, and the effect on the equipment for the high velocity air flow. Playing devils advocate the Cylinder has a cold to 60c time of around 4-6 hours at 23c (12 hours at -5) without immersion just using the EAHR. And this is generally only after holidays and on initial startup. I called Dimplex and they told me depending on the exhaust temperature, top up is usually only a few minutes up to 15 minutes at -5 degrees (this is not in the manual, this was a direct discussion with technical). being honest I don't know how often top up will occur - maybe another call to technical lol... I completely get the high velocity of air flow in the AV rack and around the components, and as you said dust is the biggest worry as dust and electronics are a no no. Because of the general short bursts of velocity Air intake would it still be so bad. most of the time the MVHR will be taking the heat at a much lower velocity (which I don't know yet). The Yamaha A2 is a fantastic amp with awesome sound and the KEFs are a much better fit, got to keep the neighbours happy! My SR7013 AV amp gets so hot you can just about touch it... its just the nature of the beasts! Thank you very much for the reply.

gotcha

Someone has to support them ? Soon to be way north of the river, moving out of London for a more rural life. Thanks for the welcome Mick

I think we are digressing a little, I don't have a problem paying my bill or what the costs are, but all AV racks generate quite allot of heat because they allow you to consolidate all your equipment in one place, we don't need to have regs to know that putting 30 pieces of equipment that would normally be spread across the home in once place will generate heat. My current cupboard hits around 35-40c and then the extractor fan kicks in... (very inefficient pumping it out the house). I am trying to find out if my design will help with cooling the equipment and also use the inefficient heat generated in an efficient way by helping to heat the home and also heat the hot water. EDIT I should mention: I have two pieces of equipment going in Air Source Heat Pump Cylinder - this is for hot water has a heat pump built in the top of the cylinder Vent Axia - MVHR But more importantly I was after finding out if the design works, there is solenoid valves, sealed cabinets, I need to know if the design in the way the heat recovery will operate in the AV cupboard. I will be running a 150mm duct from outside air to the cupboard as I am nervous to create a vacuum in the utility room this is going to sit in. But I do appreciate all your comments they are very informative! Mick

Thank you very much for this, the main concept is cooling the equipment but I wanted to make sure my design would work (see my original drawing). AV Receiver Amps today don't just provide sound they also send HD signals and receive HD signals these amps are around 3-4u in size each so they are very big amps and do soo much more than play music they drive a whole cinema room sound and vision and media room alike. (the SR7013 has 9 power amps inside the 1 amp :)) Take a HD sky box for example, for something that just puts a signal on the tv they get very warm and draw 19w in standby. Mick

Thank you for the reply, It's not the lighting its the AV (Audio Visual Rack) I think I might have confused you mentioning lighting. Our AV rack contains the following: 1 x Marrantz Dolby Atmos Amp (this is for my cinema room surround sound) these get very very warm as they drive 11 speakers and subwoofer. 1 x Marrantz 5.1 Amplifier (this is for our dining room media room) also gets very warm 6 speakers 1 x Marrantz 5.1 amplifier (this is for my master bedroom surround sound) again very warm 6 speakers 1 x Wyrestorm 4K HDbaseT Matrix, this distributes HD from the rack to all the televisions (very warm) 2 x Sky HD boxes. (quite warm) 3 x Apple TV (not really much these are good) 6 x Sonos Connects (slightly warm) 1 x Sonance 4 Channel DSP amplifier (runs music for all other zones) drives 10 speakers. 2 x Sonace DSP amplifiers (these run my 2 subwoofers in the cinema room) (quite warm) 1 x savant processor (slightly warm) 1 x 2u Rack mount PC server that runs flex and all our files (pictures etc) this is a 400w PSU power server - runs quite warm. 1 x Draytek Managed network switch P2880 (quite warm) 1 x Ruckus Wifi Zone Manager 1 x Draytek Router as you can see there is tons of heat coming off our Audio Visual systems that we have. and reusing this heat is what I am trying to do. I do have to mention, that the cylinder is nothing to do with MVHR its for the hot water, I wanted to use the heat to help with two things Cool down the rack equipment, and prolong equipment life Use the Excess Heat to help with the MVHR, and also heat the hot water when its called for. Hope that explains it better. Mick

Thank you very much Pocster, looking forward to reading about your MVHR Installation. Mick

We use GU10 Phillips Master Colour Expert Lamps for all our projects where budgets are lower, they are very reasonable in price now (around £6-£9) and have a CRI (Colour Rendering Index) of around 90+ which is very high for a lamp. CRI is really important and it makes colours look like they are supposed to look when under the lamp. 2700K (warm white) is what users normally ask for but you can get them in 3000K, 4000K & 4500K (cool white) 6000K (very cool white - almost blue). However if you are looking for a really decent fitting and do not mind spending the money then you can not go wrong with Orluna Lighting fittings, they are very expensive but have 1000 Lumens output at 9.6w for the "Orluna One" but even more important they have a CRI 98 (CRI 99 for RED) which is very high. FYI: Part L Building Regulations = A low energy light is only classed as low energy if it produces over 400 lamp lumens and has an efficacy of over 45 lumens per watt. Mick

The Lighting is very efficient compared normal lighting in a house, its a control system, I trim all lighting down to 80% at maximum this has a 20% saving on every light output in the house. Lights are automatically turned off if no activity in rooms after 1 hour, where a normal switch needs an operator to remember it needs switching off. I design high end lighting systems as a job. I put the lighting in the same cupboard as the AV rack because I want to use the heat to help heat the house, its the AV that gives off heat (AV = audio visual) this includes amps and HDBaseT matrixes for the whole house television and music distribution, I have a Atmos setup and the amp runs 11 speakers and 2 sub woofers. these amps get very warm... Also none of this is set in stone yet, I have not completed on the purchase (I get keys in a week) and it can be changed, this is why I am asking. We are also lining all internal walls with 50mm + 12 Insulated plasterboard. And early next year the whole house from the outside is having 100mm of insulation installed, I expect the house to be very air tight. Thank you very much for your input

Hi All, Thank you very much for having me on your forums, the design is very nice and easy to navigate. I am a qualified electrician and been in the trade for over 20 years, I have a level 4 in electrical design plus all the usual electrical qualifications, city and guilds Solar PV Qualified but never held the MCS, Btec Level 3 in fire detection (but forget almost all of it as it was around 15 years ago). Own a Small business in Audio visual and high end lighting control. Really enjoy and have a passion for designing high end lighting control systems, and I am qualified in KNX design, Lutron HomeWorks QS, Rako Lighting, etc, and Cisco networking and I don't really know how I have a MCP (Microsoft Certified Professional) qualification for my sins - but use a Mac for everything now... All my friends say I am addicted to courses. I came here for help with a MVHR system that I am planning the installation of and I will have many questions on that, and hopefully I can help other members with lighting or audio visual in the future. Love a beer with the lads when the mrs lets me out, support Arsenal (don't say it lol), just enjoy having fun and my kids drive me mad! Thank you for reading.

Hi All, I am in the last stage of completing on a house, So I have started the design of electrics, audio visual, and Lutron lighting throughout. The issue I am having is I don't know much about MVHR and ventilation, I have done lots of reading but wanted to ask an expert that could guide / critic my idea. Design Features: Dimplex Air Source Heat Pump Cylinder Use the warm air from the Lutron and AV Rack to help heat the hot water. Connect the MVHR to the AV rack cupboard, to utilise the heat recovery when the cylinder is not running. 150mm pipe from the Cylinder to the AV rack top part (heat rises) 150mm Pipe from outside to the AV rack to allow cool air to be pulled in and cool down the equipment. AV / Lutron Rack to be sealed in using rubber, and the whole cupboard the rack sits inside to be completely air sealed. MVHR Pipe will have a 75mm Solenoid valve that connects to the Fan cable of the Air Source Heat Pump - when the fan is running the normally open solenoid will close. I have created a drawing, of the proposed system which will explain my idea... So what do you think, and thank you for your time. Mick