Air "insertion" fan?

[Deleted member 307320]

Today it was fairly warm, but inside my house (which hasn't been occupied for a few days) it was colder than outside.

Anyone know of a system which I can use to blow warm air into the house when it's warmer ourside than in?!

I'm definitely not thinking of any "air source heat pump" type thing, just a cheap "extractor" fan in reverse which operates on a couple of temperature sensors!

 

[Ivor Windybottom]

Get yerself onto Dragon's Den, sounds like you've come up with a new, exciting product. That probably nobody will want.

I doubt you'll get the cost back, ever.

 

[George_engineer]

Positive input ventilation fan.

Mainly used to manage stale air or humidity.

 

[Ivor Windybottom]

A whole house ventilation system might be able to do this. They were a thing once, don't think many installed them though.

Have you checked the air temperature, in the shade? It may not be much warmer outside, out of the sun. A fan can't suck the sunshine in.

 

[DiyNutJob]

Anyone know of a system which I can use to blow warm air into the house when it's warmer ourside than in?!

What about the open all windows system?

 

[^woody^]

A window

 

[Deleted member 307320]

Get yerself onto Dragon's Den, sounds like you've come up with a new, exciting product. That probably nobody will want.

I doubt you'll get the cost back, ever.

Why wouldn't anyone want it?!

It was chilly inside today, it was warmer outside...

The only solution I had was to turn on the heating which seemed a bit silly...

Yes, I could open a few windows and doors (which I did!) but it's not like it would take unimaginable technology to have kept my house warmer automatically!

 

[DiyNutJob]

Yes, I could open a few windows and doors (which I did!) but it's not like it would take unimaginable technology to have kept my house warmer automatically!

A tech tip from Scandinavia is to drink something hot.

 

[Ivor Windybottom]

We used to open the door to the conservatory on sunny but cold days. Occasionally you get a bit of free heat this way, but it would never cover the cost.

 

[Deleted member 307320]

We used to open the door to the conservatory on sunny but cold days. Occasionally you get a bit of free heat this way, but it would never cover the cost.

What cost?

I'm literally thinking a fan with a couple of temperature sensors!

 

[noseall]

Today it was fairly warm, but inside my house (which hasn't been occupied for a few days) it was colder than outside.

Anyone know of a system which I can use to blow warm air into the house when it's warmer ourside than in?!

I'm definitely not thinking of any "air source heat pump" type thing, just a cheap "extractor" fan in reverse which operates on a couple of temperature sensors!

Unlikely to work in any case. Air moving over a surface, tends to cool that surface. I'd just be thankful that my house is well insulated. It's one of the talking points we have with customers, when they notice its cooler inside their new extension on a warm sunny day.

 

[George_engineer]

Unlikely to work in any case. Air moving over a surface, tends to cool that surface. I'd just be thankful that my house is well insulated. It's one of the talking points we have with customers, when they notice its cooler inside their new extension on a warm sunny day.

It doesn't if the air is warmer than the surface.

 

[noseall]

It doesn't if the air is warmer than the surface.

Agree, but you will create air movement in several places, not just where the warm air moves in. I'm pretty sure the advantage of the warm air moving in will be cancelled out, unless it is done more scientifically. You'd probably need a method of removing the interior cold air also whilst introducing the warm air into the optimum locations.

 

[Ivor Windybottom]

After spending whatever money on buying the equipment, you then need to assess whether the energy spent moving the air is more or less than the additional energy (heat) contained in that very slightly warmer outside air. As it's going to be a difference of a few degrees it's unlikely to be worth the energy of moving it, you may get more heat from a 60W heater than you would from a 60W fan pulling in air that's slightly warmer than inside.