Geekzone: technology news, blogs, forums
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.

2782 posts

Uber Geek
+1 received by user: 120

Topic # 159999 19-Dec-2014 16:14
Send private message

Bought a house with a DVS-type system in it and an accompanying thermostat, which of course is ripe for gadgetising (which I just decided is a word).

The obvious choice seems to be one of the Nest units, which aren't particularly cheap and don't _appear_ to be sold in NZ, not that that's much of a deterrent (thanks YouShop!)

Has anyone used one of these? Any thoughts\opinions\suggestions?

I still need to investigate compatibility, but they seem like a neat device and if nothing else look a lot swisher than the standard grey boxes.


Create new topic
2895 posts

Uber Geek
+1 received by user: 1096


  Reply # 1201307 21-Dec-2014 01:27
Send private message

My understanding is that the Nest thermostats are only intended for use with proper central heating systems. Not a ventilation system that thinks it is a heating system (HRV and DVS systems). If you want to "Mod" it, Just go the Arduino route. That way you could add humidity sensing as well as temp sensing.

As a minimum the nest thermostat will need a temp sensor in the roof to match the DVS system.

And unlike a central heating system, the roof space heat is free, so no need to try and conserve it. But of course it is only available at certain times / weather conditions. While heat from a central heating system is always available. But costs money so you do need to conserve it. Therefore completely different means of control are required.

Short answer - don't bother with trying to use a nest thermostat on a DVS system

2782 posts

Uber Geek
+1 received by user: 120

  Reply # 1202089 22-Dec-2014 14:46
Send private message

It's not a DVS as such, there's a gas heater involved in the unit somewhere. Might have to look into the Arduino idea.

2895 posts

Uber Geek
+1 received by user: 1096


  Reply # 1203478 24-Dec-2014 23:07
Send private message

stevenz: It's not a DVS as such, there's a gas heater involved in the unit somewhere. Might have to look into the Arduino idea.

So is your system actually a ducted gas central heating system? If so then it is completely different to a DVS system. As all DVS and HRV systems do is take air from your roof space, run it through a filter, and then discharge it into your house. With typically a temp sensor in the roof and another in the house. With some simple control programming to change the fan speed.

Compared to a ducted gas system that takes air already in your house, heats it, then puts it back into your house.

You will definitely need to figure out which system you have.

Create new topic

Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:

Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:

Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:

News »

Intel introduces new NUC kits and NUC mini PCs
Posted 16-Aug-2018 11:03

The Warehouse leaps into the AI future with Google
Posted 15-Aug-2018 17:56

Targus set sights on enterprise and consumer growth in New Zealand
Posted 13-Aug-2018 13:47

Huawei to distribute nova 3i in New Zealand
Posted 9-Aug-2018 16:23

Home robot Vector to be available in New Zealand stores
Posted 9-Aug-2018 14:47

Panasonic announces new 2018 OLED TV line up
Posted 7-Aug-2018 16:38

Kordia completes first live 4K TV broadcast
Posted 1-Aug-2018 13:00

Schools get safer and smarter internet with Managed Network Upgrade
Posted 30-Jul-2018 20:01

DNC wants a safer .nz in the coming year
Posted 26-Jul-2018 16:08

Auldhouse becomes an AWS Authorised Training Delivery Partner in New Zealand
Posted 26-Jul-2018 15:55

Rakuten Kobo launches Kobo Clara HD entry level reader
Posted 26-Jul-2018 15:44

Kiwi team reaches semi-finals at the Microsoft Imagine Cup
Posted 26-Jul-2018 15:38

KidsCan App to Help Kiwi Children in Need
Posted 26-Jul-2018 15:32

FUJIFILM announces new high-performance lenses
Posted 24-Jul-2018 14:57

New FUJIFILM XF10 introduces square mode for Instagram sharing
Posted 24-Jul-2018 14:44

Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.

Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.