ᐅ Heat pump foundation 110 kg. Frost protection / frost resistance
Created on: 19 Jan 2017 14:19
W
world-eHello everyone,
Brief description: A heat pump is to be installed 30 cm (12 inches) away from the house on a foundation. The house has a basement, so the heat pump would be located in the basement utility room. The heat pump weighs just under 110 kg (1.3 m (4 ft 3 in) long, 80 cm (31 inches) high, and 40 cm (16 inches) deep). All connections between the heat pump and the house are flexible.
What kind of frost heave should be expected if the foundation is not frost-protected? Or does the heat pump foundation need to be extended down to the basement floor slab?
Thank you for your experiences.
Brief description: A heat pump is to be installed 30 cm (12 inches) away from the house on a foundation. The house has a basement, so the heat pump would be located in the basement utility room. The heat pump weighs just under 110 kg (1.3 m (4 ft 3 in) long, 80 cm (31 inches) high, and 40 cm (16 inches) deep). All connections between the heat pump and the house are flexible.
What kind of frost heave should be expected if the foundation is not frost-protected? Or does the heat pump foundation need to be extended down to the basement floor slab?
Thank you for your experiences.
I want to bring this topic up again!
It concerns me as well right now. The basement is now buried, and the recycled material was compacted in several layers. The fill was done up to about 20cm (8 inches) below the finished top edge of the lawn/paving.
Now I want to prepare the base for the outdoor unit. The outdoor unit measures 90x40x120cm (W x D x H). The supply lines are next to it inside a 100mm (4-inch) PVC pipe.
The condensate should drain into a gravel layer. This means I don’t want a full concrete slab, just two narrow strips where the feet of the outdoor unit will rest.
My question is:
How deep do I need to pour the concrete? According to the outdoor unit’s instructions, the strips are 10x55cm (W x D). The heating technician said that concrete slab pavers or similar might be enough, and I wouldn’t necessarily need a concrete base, but I would feel safer with it.
I have never done something like this before but would like to understand it better now.
Can I simply use the 20cm (8 inches) plus ground clearance as the height and pour the concrete onto the currently compacted ground? (Formwork, of course, per the 10x55cm size) That would result in about 30-35cm (12-14 inches) of concrete height, with only about 10-15cm (4-6 inches) visible afterwards.
Looking forward to your experiences.
It concerns me as well right now. The basement is now buried, and the recycled material was compacted in several layers. The fill was done up to about 20cm (8 inches) below the finished top edge of the lawn/paving.
Now I want to prepare the base for the outdoor unit. The outdoor unit measures 90x40x120cm (W x D x H). The supply lines are next to it inside a 100mm (4-inch) PVC pipe.
The condensate should drain into a gravel layer. This means I don’t want a full concrete slab, just two narrow strips where the feet of the outdoor unit will rest.
My question is:
How deep do I need to pour the concrete? According to the outdoor unit’s instructions, the strips are 10x55cm (W x D). The heating technician said that concrete slab pavers or similar might be enough, and I wouldn’t necessarily need a concrete base, but I would feel safer with it.
I have never done something like this before but would like to understand it better now.
Can I simply use the 20cm (8 inches) plus ground clearance as the height and pour the concrete onto the currently compacted ground? (Formwork, of course, per the 10x55cm size) That would result in about 30-35cm (12-14 inches) of concrete height, with only about 10-15cm (4-6 inches) visible afterwards.
Looking forward to your experiences.
We are doing the same, outdoor heat pump unit on a base.
I was going back and forth on how to do it. In the end, I asked our structural builder. It costs me 250 euros, and now I have peace of mind knowing it will be done properly.
Your planned 35 cm (14 inches) is not frost-free. For the columns, expect them to be at least 1 meter (39 inches) tall (the condensate accumulating down there could potentially cause it to crack).
I was going back and forth on how to do it. In the end, I asked our structural builder. It costs me 250 euros, and now I have peace of mind knowing it will be done properly.
Your planned 35 cm (14 inches) is not frost-free. For the columns, expect them to be at least 1 meter (39 inches) tall (the condensate accumulating down there could potentially cause it to crack).
krausf3 schrieb:
This is relevant to me right now as well. The basement is now buried, and the recycled material was compacted in several layers. It was backfilled up to about 20cm (8 inches) below the finished top level of the lawn/paving.
Now I want to prepare the base for the outdoor unit. The outdoor unit measures 90x40x120cm (WxDxH). The supply lines run next to it inside a 100mm (4 inch) drainage pipe.
The condensate should drain into a gravel layer. This means I don’t want a solid slab foundation, but just two narrow strips where the feet of the outdoor unit will rest.
My question is:
How deep should I pour the concrete? According to the outdoor unit’s instructions, the strips should be 10x55cm (WxD). The heating technician said that concrete paving slabs or something similar would be sufficient and that a concrete base might not be necessary, but I would feel safer with one.
I have never done anything like this myself, but now I want to get into it.
Can I simply take the 20cm (8 inches) plus clearance as the total height and pour the concrete onto the currently compacted ground? (Of course forming the strips at 10x55cm.) That would give me a concrete height of about 30-35cm (12-14 inches), with only 10-15cm (4-6 inches) visible above ground later.
Looking forward to your answers...How did you finally build the foundation?
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