MVHR Design And Install

[Gus Potter]

2 hours ago, JohnMo said:

How it works, day time, bedrooms not used, trickle vents almost fully closed. Downstairs rooms have people so the vents start to open in response to rising humidity, fans draw the air across the room, through corridors and out the house. At night the effect swop, now bedroom trickle vents open and downs close. No-one in house, all trickle vents go to min opening

This is elegant at first glance. It might float your boat.. but I honestly despair at times. 

 

You write a lot of good stuff John but what about say a young couple that come to buy your house. Will you make them aware of any potential maintenance issues? 

 

Now you may have all your faculties at the moment and I'm sure you think this is your forever home, but when you get less "sharp" and need folk to maintain your house who may be less dilligent.. what then?

 

I totally get that your house is your hobby.. but in my day job I need to give Clients best advice. That includes protecting their asset. 

 

I do love you technical grasp and hope you don't mind me taking a more general view.

 

 

 

 

 

 

 

 

[JohnMo]

5 hours ago, Gus Potter said:

This is elegant at first glance. It might float your boat.. but I honestly despair at times. 

 

You write a lot of good stuff John but what about say a young couple that come to buy your house. Will you make them aware of any potential maintenance issues? 

 

Now you may have all your faculties at the moment and I'm sure you think this is your forever home, but when you get less "sharp" and need folk to maintain your house who may be less dilligent.. what then?

 

I totally get that your house is your hobby.. but in my day job I need to give Clients best advice. That includes protecting their asset. 

 

I do love you technical grasp and hope you don't mind me taking a more general view.

 

Absolutely nothing wrong with a dMEV system, what maintenance, there is none? The trickle vents are controlled by a membrane that contracts or expands to variable moisture levels, zero inputs from anything else. The fans are commercial available bathroom fans. Greenwood make a nice one, but many others available. Way less maintenance than MVHR.

 

Zero faculties needed, fit it walk away. That cannot be said or MVHR as you need to change filters etc.

 

5 hours ago, Gus Potter said:

young couple that come to buy your house. Will you make them aware of any potential maintenance issues? 

Same as any other house, I have owned around 10 houses, no one has ever told me anything about maintenance ever. But as said above dMEV, what maintenance?

[Nickfromwales]

5 hours ago, JohnMo said:

Way less maintenance than MVHR.

MVHR has centralised filtration at the unit. Cleaning or replacing the filters can be done faster than making a cup of tea from scratch.

 

Multiple units in different locations adds to this ‘problem’, as anything that air flows through will attract dust that needs removing, so that is at every trickle vent, plus the fan filters, worse if the fan is in an attic space.

 

MVHR is the better solution, afaic, because of the ease of (self) maintenance and the heat recovery.

[JohnMo]

18 minutes ago, Nickfromwales said:

Cleaning or replacing the filters

Your preferred Brink MVHR, filters from a quick look are £70+, depending on area you live, that could be twice a year expense. So may only take the time it takes to make a cuppa, but it becomes an expensive cuppa.

 

Had a dMEV fan running in a summer house a couple of years, nothing has been done, nothing has been needed, could replace the whole fan nearly twice for the cost of your filters.

 

28 minutes ago, Nickfromwales said:

MVHR is the better solution, afaic,

MVHR isn't the only solution, and not always the correct or only solution.

[Nickfromwales]

28 minutes ago, JohnMo said:

filters from a quick look are £70+, depending on area you live

In your own words, “look harder”