Aircon unit suggestions

Tiexen

You should watch this:

Portable Air Conditioners - Why you shouldn't like them

https://youtu.be/_-mBeYC2KGc

tempus_fugit

Tiexen said:

You should watch this:

Portable Air Conditioners - Why you shouldn't like them

https://youtu.be/_-mBeYC2KGc

Some sort of summary of why would be nice rather than make us all watch a video.

jamesd

A summary:

1. they aren't as efficient as window or central units.
2. the types with one hose are even less efficient because they use cooled room air as input for their exhaust. That also reduces room pressure and sucks in more hot air from outside the room.

Both are true but you're unlikely to find many window units available in the UK even though they are ubiquitous in the US.

[Deleted User]

knightstyle said:

can someone explain how these work when they say to seal the room with a window seal then put a single exhaust tube outside?  So where does the unit get the air supply from in order to send the warm air down the tube? Surely you need a supply of air, probably warm, into the room?
Commercial units I have worked on have external air ducts into and out from the condenser, the room air is recirculated through the evaporator with a small, 10% fresh air supply to keep oxygen levels OK.

This is exactly why these types of portable of air conditioners are not as efficient as those with external condensers that pipe the refrigerant outside to an external condenser radiator for cooling - also known as "wall split air conditioning".

The cooling side (evaporator) just uses re-circulated air in the room which is perfectly ok but the hot side (condenser) uses the some of air in the room that has just been cooled to cool the hot condenser and then blows that out through the window - wasting energy that has just been used to cool the air.

Because the system is extracting air, the room will need to suck in air through various means like gaps in the door and floors (just like when you use an extractor fan in a closed bathroom) and unfortunately that will also be warmer air coming in that needs cooling as well.

Oxygen levels will be fine, better than a room with no windows or ventilation because the extraction will cause some new air to be sucked in from elsewhere.

A proper split system will work more efficiently because it just uses the external air outside the house to cool the condenser so it isn't wasting the cool air in the room.

collinsca said:

knightstyle said:

can someone explain how these work when they say to seal the room with a window seal then put a single exhaust tube outside?  So where does the unit get the air supply from in order to send the warm air down the tube? Surely you need a supply of air, probably warm, into the room?
Commercial units I have worked on have external air ducts into and out from the condenser, the room air is recirculated through the evaporator with a small, 10% fresh air supply to keep oxygen levels OK.

The hose goes outside the window to bring the air in.
It is possible to buy kits to seal the window so that only the hose is exposed to the outside.

The hose doesn't bring air in from the outside with portable air conditioners, it is used to expel hot air that after it has been passed over the condenser.