Anyone replaced central heating with air to air in bungalow?

Martyn1981

wrf12345 said:

Air-conditioners are placed high on internal walls but should those used for heating be placed at the same level as radiators, as heat rises?

High is fine for the A2A units for heat. This will be pretty much the same as radiators, since they don't really radiate heat, unless very hot, they act as convection heaters, with the warmth rising to the ceiling then travelling across the room and circulating. [Edit - just to be clear, I mean that's how radiators work, the A2A can blow the heat around using their fans like matelodave mentions. M.]

Really silly, but many many years ago I uesd a left over helium balloon to see how the heat moves. Replaced the little plastic weight on the string with a small plastic bag, then added salt till the balloon was neutral and free floating just off the ceiling by the radiator. Turned on the GCH, and the balloon slowly travelled away from the rad towards the door which was wide open, then ducked down and went through the door (without ever touching the ceiling or door frame). Now in the hallway, it travelled to the stairs and went upstairs. Good lesson in closing doors. Now a good lesson in the exact opposite, as we leave doors open to let the heat from the A2A units escape their downstairs room and spread through the house.

Martyn1981

barker77 said:

Next steps for me are to work out 

1) which brands have best scheduling functionality ie set to whatever temp at 8am till whenever 
2) how quiet they are inside and out 
3) warranty 
4) how much can control airflow as ideally want to feel it as little as possible when on heat mode 

The company I spoke to also suggested not putting the ac units where the head of the bed is due to noise directly above your head, I assumed the air blowing away from you while sleeping might be better but keen to know what others have done. Also wasn’t aware that any units on internal walls need a condensate pump - does anyone have experience how noisy these are / how ugly ?  

Hi barker, I wouldn't put one in the bedroom, as they can produce a lot of heat. And if you want to heat the property on cheap night rate, then that's when you will want to work them hard.

For a bungalow, depending on size, perhaps an internal unit in the hallway by the bedrooms/bathroom, and one in the largest living space, like living room/kitchen. Then during the day you leave rooms open, as much as you can for the warmth to spread. You may even want to close the door to the bedroom(s), so they don't get too warm for pleasant sleep.

matelodave

Not necessarily as the units have fans to circulate the warm air to adjust the louvres to direct the air downwards.

The other alternative to a high mounted unit is a low wall unit - some units can be mounted either high or low see here - https://www.pioneerminisplit.com/collections/uyb

barker77

Martyn1981 said:

barker77 said:

Next steps for me are to work out 

1) which brands have best scheduling functionality ie set to whatever temp at 8am till whenever 
2) how quiet they are inside and out 
3) warranty 
4) how much can control airflow as ideally want to feel it as little as possible when on heat mode 

The company I spoke to also suggested not putting the ac units where the head of the bed is due to noise directly above your head, I assumed the air blowing away from you while sleeping might be better but keen to know what others have done. Also wasn’t aware that any units on internal walls need a condensate pump - does anyone have experience how noisy these are / how ugly ?  

Hi barker, I wouldn't put one in the bedroom, as they can produce a lot of heat. And if you want to heat the property on cheap night rate, then that's when you will want to work them hard.

For a bungalow, depending on size, perhaps an internal unit in the hallway by the bedrooms/bathroom, and one in the largest living space, like living room/kitchen. Then during the day you leave rooms open, as much as you can for the warmth to spread. You may even want to close the door to the bedroom(s), so they don't get too warm for pleasant sleep.

Im going to put them in all rooms excluding hallways and bathrooms as they then act similar to radiators and can be individually controlled to a set temp. 

Martyn1981

barker77 said:

Martyn1981 said:

barker77 said:

Next steps for me are to work out 

1) which brands have best scheduling functionality ie set to whatever temp at 8am till whenever 
2) how quiet they are inside and out 
3) warranty 
4) how much can control airflow as ideally want to feel it as little as possible when on heat mode 

The company I spoke to also suggested not putting the ac units where the head of the bed is due to noise directly above your head, I assumed the air blowing away from you while sleeping might be better but keen to know what others have done. Also wasn’t aware that any units on internal walls need a condensate pump - does anyone have experience how noisy these are / how ugly ?  

Hi barker, I wouldn't put one in the bedroom, as they can produce a lot of heat. And if you want to heat the property on cheap night rate, then that's when you will want to work them hard.

For a bungalow, depending on size, perhaps an internal unit in the hallway by the bedrooms/bathroom, and one in the largest living space, like living room/kitchen. Then during the day you leave rooms open, as much as you can for the warmth to spread. You may even want to close the door to the bedroom(s), so they don't get too warm for pleasant sleep.

Im going to put them in all rooms excluding hallways and bathrooms as they then act similar to radiators and can be individually controlled to a set temp. 

Wow, was not expecting that. How many rooms, the cost could really add up, and the multi-split units can be more expensive than multiples of single units, but will need to be hardwired. Mind you, saying that, whilst a normal split unit just plugs into a socket, you should really only have one per ring main, without considering additional wiring.

Possibly best to avoid kitchen too, as the filter could suffer from moisture and cooking oils.

zxzxzx

wrf12345 said:

Air-conditioners are placed high on internal walls but should those used for heating be placed at the same level as radiators, as heat rises?

Have a look at pages 10-13, I have this and subjectively this is how it feels.

barker77

zxzxzx said:

wrf12345 said:

Air-conditioners are placed high on internal walls but should those used for heating be placed at the same level as radiators, as heat rises?

Have a look at pages 10-13, I have this and subjectively this is how it feels.

You have them low on the walls ? 

zxzxzx

barker77 said:

zxzxzx said:

wrf12345 said:

Air-conditioners are placed high on internal walls but should those used for heating be placed at the same level as radiators, as heat rises?

Have a look at pages 10-13, I have this and subjectively this is how it feels.

You have them low on the walls ? 

3/4 inches down from the ceiling. Looked at floor level blowers but was convinced that high position fan was strong enough to circulate warm (and indeed cold) air. The air can be pointed to one position or move vertically and horizontally to cover the whole room.

barker77

zxzxzx said:

barker77 said:

zxzxzx said:

wrf12345 said:

Air-conditioners are placed high on internal walls but should those used for heating be placed at the same level as radiators, as heat rises?

Have a look at pages 10-13, I have this and subjectively this is how it feels.

You have them low on the walls ? 

3/4 inches down from the ceiling. Looked at floor level blowers but was convinced that high position fan was strong enough to circulate warm (and indeed cold) air. The air can be pointed to one position or move vertically and horizontally to cover the whole room.

Thanks! Can I ask are any on internal walls as i didn’t realise rhey needed condensate pumps and have no idea how noisy they are ? Also wasn’t aware they needed trunking as thought they could just be connected from loft ? 

zxzxzx

barker77 said:

zxzxzx said:

barker77 said:

zxzxzx said:

wrf12345 said:

Air-conditioners are placed high on internal walls but should those used for heating be placed at the same level as radiators, as heat rises?

Have a look at pages 10-13, I have this and subjectively this is how it feels.

You have them low on the walls ? 

3/4 inches down from the ceiling. Looked at floor level blowers but was convinced that high position fan was strong enough to circulate warm (and indeed cold) air. The air can be pointed to one position or move vertically and horizontally to cover the whole room.

Thanks! Can I ask are any on internal walls as i didn’t realise rhey needed condensate pumps and have no idea how noisy they are ? Also wasn’t aware they needed trunking as thought they could just be connected from loft ? 

No problem. Mine is a single unit in the lounge, so blower inside and HP attached to the exterior wall above head height outside no trunking/condensate pump as such.
Noise inside is minimal, quieter than a large floor standing fan that I use in a conservatory, obviously variable depending on how fast I set it and there is a ‘silent’ mode on mine which I have never used! HP outside is also minimal, I imagine the same as any modern one. (Installed a year ago) As an example, during an agile ’paid to use’ period last winter I ran it through the night with all doors open in my 2 bed bungalow at 27c output and neither my wife who is noise allergic or I heard it.