Heat transfer kit?

[alanzs]

Not sure about that. I would not think it necessary since it is not pulling outside air inside - just moving interior air from one room to the next. I imagine a filter would not be hard to put in though...



Exactly. Which is why I didn't get one. In winter I don't want cold air blown into the house. And in summer I don't want warm air blown in. Quite the opposite.
The HTS system I have can be rigged, at a cost, to pump in cooler air from outside during summer. I have not had that option installed. Yet anyway.

The HRV system has an option that will pull cooler air from the south side of the house in the summer, but it still isn't air conditioning. I prefer the house with the HRV as it is much fresher and there is ventilation. When they promote it like it is going to heat your house, they are full of shit. Totally deceptive the way they market their product.

[Slicksta]

The HRV system has an option that will pull cooler air from the south side of the house in the summer, but it still isn't air conditioning. I prefer the house with the HRV as it is much fresher and there is ventilation. When they promote it like it is going to heat your house, they are full of shit. Totally deceptive the way they market their product.

You can get heat coils to go in the ducting that can help take the chill of the air it takes in

[Edbear]

sorry i didnt read all the replies, im at work so shouldn’t be on here to long.

From your first post you’re not after a heat transfer kit. You’re after a positive pressure system. All the brands you named use a EU7 (or higher) grade filter. That’s plenty for pollen and the like.

If you are after a heat transfer kit $1200.00 sounds pretty high for an installed kit.
Securimax make a good one that you can get from bunnings / mitre 10 / and most electrical wholesalers. They have two different types. The cheaper is still a good kit and works well. The more expensive “pro series” has a slightly better fan and uses “acoustic ducting” so it’s a bit quieter.
For a heat transfer kit to work you need to have a fire!!! And it must be a wood fire. Never use a heat transfer kit with a gas fire, you can transfer un burnt gas into other rooms.

Good luck.

Interesting. So with a mains gas fire, what would work in the average 3brm house? Or is it just not an option? Are there heat-transfer systems suitable?

[Swoop]

It uses a big-arse fan (well, 20mm I think)

20mm? An asthmatic mouse could cough a greater airflow than that!

[BMWST?]

you can buy diy heat transfer kits fom mega m10 etc.HRV systems are different but some offer heat transfer options along with the positive pressure ventilation

[slofox]

20mm? An asthmatic mouse could cough a greater airflow than that!

Missed a zero, huh? Read 200mm. Must have been typing too fast again...

[Quasievil]

Ring Choppa, a member of KB he does this stuff for a living

[hayd3n]

hrv are bringing out a add on heater!!
but all ducting will have to be replaced with insulated ducting :<
was quoted 1500 for heater+ ducting to go on our existing hrv unit

[mossy1200]

Not sure about that. I would not think it necessary since it is not pulling outside air inside - just moving interior air from one room to the next. I imagine a filter would not be hard to put in though...



Exactly. Which is why I didn't get one. In winter I don't want cold air blown into the house. And in summer I don't want warm air blown in. Quite the opposite.
The HTS system I have can be rigged, at a cost, to pump in cooler air from outside during summer. I have not had that option installed. Yet anyway.

You can get inline element tray to warm the air before it pumps in.The elements are not large but do work.These will run on auto depending on the ceiling temp thermo.
Condensation on windows is the moisture being attracted to the coldest surface.The less moisture the less condensation.
You could hire dehumidifier and run that for a week then see if you like the results.Maybe then buy a good one instead of transfer system since it seems that heat etc is not your issue.
Remember a dry home heats 30% more efficiently.
Also heat pumps use exchange system like a fridge so they also work like a dehumidifier.(both are like the chill plate that freezes then defrosts inside an old school fridge.When the defrost occurs the water runs down into the collector tank above the compressor then evapourates into the room.On the heat pump this drains outside and the dehumidifier you pour it out down sink.all use the same principle to operate.).

[slofox]

you can buy diy heat transfer kits fom mega m10 etc.HRV systems are different but some offer heat transfer options along with the positive pressure ventilation

You are right there. HTS and HRV do different jobs.

When I bought my house, someone had tried to install a DIY heat transfer system already. Which was totally useless. I spent the first winter after installing the log burner trying to get it to work. The fan was too small to move enough air. The ducting was not insulated and lost all its heat before it got any where. The outlet was into the hallway so transferred air, what little of it there was, never went anywhere but back to the lounge. Combined with all that, it had holes in it everywhere...talk about a bodgy bloody DIY'ers fuckup...

If you buy a cheaper unit, there are a couple of things you should look for.
1. The fan must be big enough to move plenty of air. 200mm minimum.
2. The ducting should be insulated - else all the heat pisses off into the ceiling space
3. Variable vents on the outlets are well worth having.
4. Check for fan noise if you can.
5. Fan is quieter if suspended in the ceiling space - not attached directly to rafters etc...

If you install it yourself, place the outlets in the corner of the room furthest away from the door, so that the warmer air has to traverse the whole room...

[slofox]

Securimax make a good one that you can get from bunnings / mitre 10 / and most electrical wholesalers. They have two different types. The cheaper is still a good kit and works well. The more expensive “pro series” has a slightly better fan and uses “acoustic ducting” so it’s a bit quieter.
For a heat transfer kit to work you need to have a fire!!! And it must be a wood fire. Never use a heat transfer kit with a gas fire, you can transfer un burnt gas into other rooms.

Good luck.

The system I have is a Securimax system...3 bedroom option on this page:

I would think flued gas fires would be quite safe with HTS...?

[325rocket]

Interesting. So with a mains gas fire, what would work in the average 3brm house? Or is it just not an option? Are there heat-transfer systems suitable?

you would probably be ok if it is a good condition mains gas fire (with a chimney) have a look at this site it might help.

You are right there. HTS and HRV do different jobs.


If you buy a cheaper unit, there are a couple of things you should look for.
1. The fan must be big enough to move plenty of air. 200mm minimum.
2. The ducting should be insulated - else all the heat pisses off into the ceiling space
3. Variable vents on the outlets are well worth having.
4. Check for fan noise if you can.
5. Fan is quieter if suspended in the ceiling space - not attached directly to rafters etc...

If you install it yourself, place the outlets in the corner of the room furthest away from the door, so that the warmer air has to traverse the whole room...

these are all good points. ducting must be insulated. i cant remember the exact amount but you lose something like 3 degrees per meter when you transfer heat through ducting.

if you hang the fan from the rafters using bungee cords it cuts most of the fan noise.

dont be scared to d.i.y the sucker its pretty straight forward you just need a electrician to wire it up.

There was a guy down south selling pro series heat trans kits on trademe for a good price. Ill see if I can find him on there for you.

Good luck.

[Edbear]

you would probably be ok if it is a good condition mains gas fire (with a chimney) have a look at this site it might help.




these are all good points. ducting must be insulated. i cant remember the exact amount but you lose something like 3 degrees per meter when you transfer heat through ducting.

if you hang the fan from the rafters using bungee cords it cuts most of the fan noise.

dont be scared to d.i.y the sucker its pretty straight forward you just need a electrician to wire it up.

There was a guy down south selling pro series heat trans kits on trademe for a good price. Ill see if I can find him on there for you.

Good luck.

Good site, thanks for that!

[dino3310]

well i had the man from zephyr around, top of the line stuff - top price to, was quoted $4400. oh well next quote please

[CHOPPA]

HRV systems and the like are a waste of money! Half the time you cant use them as they take hot or cold air from your ceiling space. To get a good idea pop your head into your roof space in the morning when you want some heating, its just as cold as your house so you cant turn it on and if you do whatever heat source you have will be basically heating your roof space!!

Heatpumps are the most effecient way to heat and dry your home fact! You also get cooling in the summer....

I can install a heatpump system cheaper then an HRV, Mitsubishi even have a new system that is sorta like HRV but far superior!

http://www.bdt.co.nz/lossnay/home.aspx