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Kristy82 
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Joined: 05 July 2008
Location: Christschurch
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 Topic: Heating & Home Ventilations Systems
Posted: 07 August 2009 at 2:06pm |
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We are in the process of trying to decide on heating and whether we need a home ventilation system for our new home we are building.
We were going to go with 2 x heat pumps (one in the living and one in the hall) and a HRV (or something similar).
However when my DH went to the heat pump shop the salesman asked why we choose the heat pump option over ducted (heat pumps are about $4500 cheaper then ducted). We chose the heat pumps as they are a cheaper option and we wanted the HRV as well ($5000 installed).
I hate condensation, and I liked the idea of the HRV system, it is healthy and filters out dust, allergens, pollen and bacteria (we are asthmatics).
The heating salesman turned around and said that if we go ducted we won't need a HRV.
I remember that when we had our consult with the HRV salesman, he had commented how they installed a system where the client had ducted heating. So now I am confused.
I guess what I want to know is your thoughts on what works with what and what doesn't from your experiences.
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cuppatea
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Joined: 05 February 2007
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Posted: 07 August 2009 at 2:24pm |
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It sounds to me like the heatpump people are just trying to sell you a more expensive system. A ducted system is great as they heat each room, cos they are ducted into each room, and the unit is up in the loft out of the way but it won't stop condensation because it's not designed to. If you could afford it I would put a ducted system in and get the hrv system, but if not I would perhaps only install one heat pump in the main living area and then get the hrv system. We have two heat pumps but since having our HRV system put in we have pretty much been able to turn the one round by the bedrooms off, at the moment I have both of them switched off and the HRV system is pumping heat down from the roof. When the air is dry it is easier for the heat to spread around the house so you may find you don't need to heat pumps and that you could just put nobo heaters or something similar in the bedrooms for when it is really cold.
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Kristy82
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Location: Christschurch
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Posted: 07 August 2009 at 3:17pm |
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cuppatea, where about do you live in NZ? How old is your house?
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cuppatea
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Posted: 07 August 2009 at 4:30pm |
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Christchurch, house was built in 1960s. Is summerhill stone and tin roof. We have fairly new windows but they aren't double glazed and DH has put that expol stuff under the majority of the floor, our roof insulation is pretty non existent though, it's up there but been there so long that it's all shrunk down.
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crakars
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Location: Wellington
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Posted: 08 August 2009 at 12:13am |
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we have a ducted heating system - warms the whole house - has managed to eliminate all the condensation as well - could you put the heat pumps in and then if needed do the HRV system later?
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scribe
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Posted: 08 August 2009 at 7:29pm |
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Like crakars, I can see where the salesman is coming from. We had a really bad condensation problem (we live in a valley), and I was skeptical that getting a ducted heating system would eliminate it, but it did. As it circulates the air around the house, it acts a lot like an HRV system.
Although obviously the heating system only goes on when it gets cold, so occassionally (maybe 5 days a year) on warm, humid days I've run a dehumidifier ... I'm not sure what the climate would be like in Christchurch though (I'm in Wellington).
If you were concerned about dust etc, you could probably get filters put over the ducts?
You might want to do a search - there have been several threads on HRVs and heating systems.
ETA: get several quotes for a heating system, the quotes we got (for our 120sq m house, ducts in all rooms, plus infinity gas hot water) ranged from $7000, to $12,000...
Edited by anakk
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hailstones
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Posted: 09 August 2009 at 2:43pm |
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My Dad works for a company in Christchurch that deals with all sorts of heating (heat pumps, fires - gas/wood/pellet, insulation etc) not sure if they deal with HRV type systems or not but he used to work for a company that did. If you are interested PM me and I could pass on his phone no to you, that way you could possibly talk to someone who knows a bit about what they're talking about.
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hailstones
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Posted: 09 August 2009 at 4:57pm |
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Was just talking to my dad and he said you would probably be best to go for the ducted/transfer system rather than heatpumps and HRV.
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Kristy82
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Posted: 09 August 2009 at 7:42pm |
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Thanks for your replies. Have pm'd you hailstones.
Still have not made a decision.
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Jaxnz1
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Posted: 09 August 2009 at 7:46pm |
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We had a heatpump installed for just around $2800, we went with a Fujitsu which works as a dehumidifier as well.....we have no condensation whatsoever and the heatpump is very cost effective, we don't have any other heating in our 3bedroom house.
When we were looking we couldn't see the point in getting an HRV system as well as a heatpump, when the heatpump gets rid of the condensation. But I guess it depends on the area you live in, I used to live in Lower Hutt and our house was so damp. Having said all that I have workmates with HRV systems and say they are great, however they do need other heating in their houses.
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angila
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Joined: 12 June 2010
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Posted: 30 June 2010 at 7:57pm |
I think you should try Undercarpet Heating or Underfloor Heating. I use these in my house and its really amazing. Moreover its affordable and gives you range of benefits, like it requires less maintenance and provides cozy environment etc.
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Heating & Home Ventilations Systems
