Hello everyone,
I built a new house 4 years ago and have the problem that the bedroom on the upper floor gets very warm in summer (when there are several warm/hot days in a row).
Therefore, I am looking for a suitable split air conditioning system.
The bedroom is about 18m² (195 sq ft) in size, which corresponds to roughly 50 m³ (1,765 cu ft) of room volume.
It would be desirable to control the system with my smartphone (plus scheduling). Ideally, there would also be an option to connect it to ioBroker. I have an HVAC technician available who can install the system.
I have the following questions:
- I have a mechanical ventilation system installed. How does this work in combination with a split air conditioner? Is there anything I should consider regarding this? The bedroom has two vents (1 supply air and 1 exhaust air).
- Next door is a child’s room (about 20m² (215 sq ft) -> about 55 m³ (1,940 cu ft) of room volume). Does it make sense to switch to a multi-split system so that I can possibly cool both rooms with one outdoor unit? I do not currently need cooling in that room, but we might decide to add it in 1-2 years. Or would it be just as good to buy a separate single split unit for that later?
- Should the distance between indoor and outdoor units be kept as short as possible? For example, I wonder if the outdoor unit should be mounted directly at the gable at the top, or if I can also mount it down near the ground (there is a garden there, so the unit would be somewhat hidden [IMG alt=" 🙂"]https://www.kaelte-treffpunkt.de/images/smilies/icon_smile.gif[/IMG]
- Main question: Which air conditioner would you recommend for my needs/requirements? I am mostly looking for the best price/performance options.
- I’m happy to buy online — I read that air conditioners are significantly cheaper in Italy. Has anyone had experience with this? What about warranty, guarantee, and customs fees?
I hope to clarify some of these questions here [IMG alt=" 🙂"]https://www.kaelte-treffpunkt.de/images/smilies/icon_smile.gif[/IMG]
Best regards,
Markus
I built a new house 4 years ago and have the problem that the bedroom on the upper floor gets very warm in summer (when there are several warm/hot days in a row).
Therefore, I am looking for a suitable split air conditioning system.
The bedroom is about 18m² (195 sq ft) in size, which corresponds to roughly 50 m³ (1,765 cu ft) of room volume.
It would be desirable to control the system with my smartphone (plus scheduling). Ideally, there would also be an option to connect it to ioBroker. I have an HVAC technician available who can install the system.
I have the following questions:
- I have a mechanical ventilation system installed. How does this work in combination with a split air conditioner? Is there anything I should consider regarding this? The bedroom has two vents (1 supply air and 1 exhaust air).
- Next door is a child’s room (about 20m² (215 sq ft) -> about 55 m³ (1,940 cu ft) of room volume). Does it make sense to switch to a multi-split system so that I can possibly cool both rooms with one outdoor unit? I do not currently need cooling in that room, but we might decide to add it in 1-2 years. Or would it be just as good to buy a separate single split unit for that later?
- Should the distance between indoor and outdoor units be kept as short as possible? For example, I wonder if the outdoor unit should be mounted directly at the gable at the top, or if I can also mount it down near the ground (there is a garden there, so the unit would be somewhat hidden [IMG alt=" 🙂"]https://www.kaelte-treffpunkt.de/images/smilies/icon_smile.gif[/IMG]
- Main question: Which air conditioner would you recommend for my needs/requirements? I am mostly looking for the best price/performance options.
- I’m happy to buy online — I read that air conditioners are significantly cheaper in Italy. Has anyone had experience with this? What about warranty, guarantee, and customs fees?
I hope to clarify some of these questions here [IMG alt=" 🙂"]https://www.kaelte-treffpunkt.de/images/smilies/icon_smile.gif[/IMG]
Best regards,
Markus
In our case, the evening cooling works well. We always cool down to 21.5°C (about 70.7°F) from around 25°C (77°F), and in the morning the temperature is about 22-23°C (72-73°F), which is comfortable.
At night, the air conditioning is off and the ventilation system is on.
Best regards,
Sabine
At night, the air conditioning is off and the ventilation system is on.
Best regards,
Sabine
E
Elias_dee6 Aug 2022 16:10Hi everyone, I find this thread very interesting! I am currently in the process of requesting an air conditioning system for my new build and would like to keep my upper floor comfortably cool. Attached you will find my floor plan. I especially want to sleep in a cooler environment and generally keep the offices on the upper floor cool as well. So the idea is to have one indoor unit in the bedroom and another one positioned centrally in the hallway to help distribute the air.
For this, I would choose a 2.5 kW (or so) unit for the bedroom and a somewhat more powerful one for the hallway.
What do you think, would this work? And where would you place the two units in the bedroom and hallway respectively?
Thanks in advance!
For this, I would choose a 2.5 kW (or so) unit for the bedroom and a somewhat more powerful one for the hallway.
What do you think, would this work? And where would you place the two units in the bedroom and hallway respectively?
Thanks in advance!
Elias_dee schrieb:
Hi everyone, I find this thread very interesting! I’m currently in the process of requesting quotes for an air conditioning system for our new build, and I would like the upper floor to be “comfortable.” Attached is my floor plan. I especially want to be able to sleep comfortably in cooler temperatures and keep the offices on the upper floor cool in general. That’s why I’m considering installing one indoor unit in the bedroom and another in a central spot in the hallway to help distribute the air.
For the bedroom, I’m thinking of a 2.5 kW (2,700 BTU) unit or something similar, and a slightly more powerful one in the hallway.
What do you think? Would this work? And where would you position the two units in the bedroom and hallway respectively?
Thanks in advance!I would only recommend a central air conditioning unit if you have a central ventilation system. Otherwise, there is likely too little air exchange between the rooms.
(At 200 m³/h (120 cfm) and assuming a building volume of 600 m³ (21,200 ft³), the air is completely exchanged every 3 hours.)
Ideally, an enthalpy heat exchanger should be installed at the ventilation system so that the incoming fresh air can absorb the humidity from the dehumidified exhaust air. This way, the incoming air enters the house with reduced temperature and humidity, which makes the cooling much more comfortable.
We plan to do it as described, with one unit each on the ground floor and the upper floor.
E
Elias_dee7 Aug 2022 10:49Crixton schrieb:
I would only install a central air conditioning system if you have a central ventilation system. Otherwise, there is probably too little air exchange between the rooms.
(With 200m3/h (about 118 cubic feet per minute) and an assumed building volume of 600m3 (21,188 cubic feet), the air is fully exchanged every 3 hours.)
Ideally, install an enthalpy heat exchanger at the ventilation system, so the incoming fresh air transfers humidity from the dehumidified exhaust air.
This means the incoming air enters the house already with reduced temperature and humidity, which makes the dehumidification by air conditioning especially comfortable.
We will do it as described, with one unit on the ground floor and another on the upper floor. Thank you for the advice. We have actually planned a central ventilation system. However, I had designed the air conditioning independently of that...
edit: Thanks also for the tip about the enthalpy heat exchanger! We have planned that as well, but only 1-2 years after moving in. I’ve often read that it is better not to use it at first, so that construction moisture can be removed more effectively...
Yes, these are two completely independent systems, and both make sense in today’s houses. If the budget allows, it is definitely worth installing either one or the other, or even both.
Of course, it would be ideal if both systems could work together rather than against each other.
Of course, it would be ideal if both systems could work together rather than against each other.
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