Heat Recovery and Stoves....again

Poco90

I know there are many threads out there about this but I am looking on some feed back. My heat recovery installer, who is no fly by night operation is telling me that I won't need an external air supply for my stove and that the vent from the HRV in the sitting room can be adjusted to allow a greater air flow for the stove. He has several customers running this way. My question is, is anyone else running this way, and what are your experiences?

Last thing I want is to find out that I should have put in an external supply when all the flooring is down.

TIA,
Poco

gizmo555

Works fine for me. I retrofitted HRV to my house, which already had a stove with no dedicated external air supply.

What it did mean, though, was that I couldn't do what I orginally had in mind, that is, to have an extract vent in the room with the stove to take heat more directly from the stove to the HRV heat exchanger.

gizmo555

it did occur to me, though, that if the stove is lit and a power cut or other fault makes the HRV go off, air to the stove would be restricted. <br />
<br />
You'd have to remember to open a window, which isn't ideal. Maybe you should put in a dedicated air supply, while you still have the option.

Poco90

Thanks Gizmo

MicktheMan

gizmo555 wrote: »

it did occur to me, though, that if the stove is lit and a power cut or other fault makes the HRV go off, air to the stove would be restricted. <br />
<br />
You'd have to remember to open a window, which isn't ideal. Maybe you should put in a dedicated air supply, while you still have the option.

Or worse still, the supply fan fails and you get -ve pressure in the house drawing out CO (carbon monoxide) into the house. Imo, an external air supply is a must together with a room sealed stove plus a CO monitor. Remember you dont generally get a second chance with CO poisening!

gman2k

Poco90 wrote: »

My heat recovery installer, who is no fly by night operation is telling me that I won't need an external air supply for my stove and that the vent from the HRV in the sitting room can be adjusted to allow a greater air flow for the stove.

Ask your installer to give a written report stating that the above installation will comply with current Irish building regulations - in particular Part F.
He won't, and will try to bluff his way out of it.

He is trying to sell you the idea that over-pressurization of the internal air supply will suffice.

galwaytt

Poco90 wrote: »

I know there are many threads out there about this but I am looking on some feed back. My heat recovery installer, who is no fly by night operation is telling me that I won't need an external air supply for my stove and that the vent from the HRV in the sitting room can be adjusted to allow a greater air flow for the stove. He has several customers running this way. My question is, is anyone else running this way, and what are your experiences?

Last thing I want is to find out that I should have put in an external supply when all the flooring is down.

TIA,
Poco

Well, I have a Stanley gas stove in my old house, without HRV, and the gas installer told me that I had to have a fixed, open, permanent air vent in the room, or he wouldn't connect it. Bear in mind that room already had a 100mm vent with a Hit & Miss grille, but that was deemend not sufficient.

I can't see how a HRV system could suffice - if nothing else the air supply will a draught.......

Poco90

Thanks for all the replies. It was always my intention to put one in and after talking with him the other day I had doubts, especially since my fireplace is in the centre of the house and not backed onto an external wall. I'll lay a couple of 4" pipes in the screed to supply he stove. Thanks again.
Poco

Antiquo

Air Supply solid fuel appliance Section 2.2 on Page 5

Also note update to UK building reg's for CO monitor and addition of air vent requirements in newer air tight builds see summary here on Stovax Stoves Addendum

AMG86

Just one further thing that you might think about is to put a damper on the pipes you are putting in the screed. It could help keep the room airtight when the stove is not being used. The stove may incorporate that damper.

Poco90

Thanks for all the posts. I intended to put in a damper alright.
Poco