ᐅ Plumbing Rough-In Inspection: What Should We Pay Attention To?
Created on: 18 Aug 2022 10:19
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fromthisplace
Hello everyone,
We are now having the shell inspection with the plumber. We already selected the fixtures back in March.
1. About the heating:
Our initial scope of work listed two models. The reason given was: "Depending on which one fits your house better." The contract now specifies the Stiebel Eltron LWZ 5S. So, I assume that a heating load calculation has been done and that this system fits our house, or am I mistaken?
2. About the inspection:
I understand that we will finalize the exact locations for the water connections and toilets. One point is the utility sink in the technical room. We would prefer a full-sized table here and need to discuss whether the plumber will install this or if we are allowed to buy it from the furniture store.
3. About the underfloor heating:
As the client, do we have any say in this? I would like to express that I prefer a low flow temperature and to ask if they can lay the loops quite close together. Of course, this is more like telling the contractor how I would like their work to be done.
Thank you all.
We are now having the shell inspection with the plumber. We already selected the fixtures back in March.
1. About the heating:
Our initial scope of work listed two models. The reason given was: "Depending on which one fits your house better." The contract now specifies the Stiebel Eltron LWZ 5S. So, I assume that a heating load calculation has been done and that this system fits our house, or am I mistaken?
2. About the inspection:
I understand that we will finalize the exact locations for the water connections and toilets. One point is the utility sink in the technical room. We would prefer a full-sized table here and need to discuss whether the plumber will install this or if we are allowed to buy it from the furniture store.
3. About the underfloor heating:
As the client, do we have any say in this? I would like to express that I prefer a low flow temperature and to ask if they can lay the loops quite close together. Of course, this is more like telling the contractor how I would like their work to be done.
Thank you all.
X
xMisterDx25 Aug 2022 10:05Too late for PPS:
Forgive me if I trust research institutes more on this kind of topic than heat pump manufacturers or industry associations. The BDEW also considers gas heating to be viable for the future because it can be operated with hydrogen or Power-to-Gas methane. But what else would the BDEW say? After all, it is THE lobby group for gas heating.
Forgive me if I trust research institutes more on this kind of topic than heat pump manufacturers or industry associations. The BDEW also considers gas heating to be viable for the future because it can be operated with hydrogen or Power-to-Gas methane. But what else would the BDEW say? After all, it is THE lobby group for gas heating.
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fromthisplace25 Aug 2022 14:10Nice to see the thread is active. 🙂
At the moment, we are still waiting for the current heating load calculation (35°C supply temperature) and the heating load calculation at my request (30°C supply temperature).
I am fairly optimistic that we will get a positive result. When I asked why the supply temperature was planned at 35°C, and whether it could be lowered by reducing the pipe spacing, my wife said we should trust the expert. He replied that lowering the supply temperature can indeed be reasonable, but he wants to calculate it first.
I could imagine that 35°C is their go-to supply temperature because most homeowners don’t really mind.
The additional costs are basically just more material for the installation and higher labor hours due to the closer pipe spacing, right?
How much would you estimate these costs to be?
At the moment, we are still waiting for the current heating load calculation (35°C supply temperature) and the heating load calculation at my request (30°C supply temperature).
I am fairly optimistic that we will get a positive result. When I asked why the supply temperature was planned at 35°C, and whether it could be lowered by reducing the pipe spacing, my wife said we should trust the expert. He replied that lowering the supply temperature can indeed be reasonable, but he wants to calculate it first.
I could imagine that 35°C is their go-to supply temperature because most homeowners don’t really mind.
The additional costs are basically just more material for the installation and higher labor hours due to the closer pipe spacing, right?
How much would you estimate these costs to be?
F
fromthisplace14 Sep 2022 22:13By now it’s September 13th, and unfortunately, there is still no updated heating load calculation, nor have I received the old one.
As a reminder: During the shell inspection in mid-August, the managing director said that reducing the heating load calculation from 35°C to 30°C (95°F to 86°F) was not a big deal. However, the responsible employee at the company has been on vacation for one week and then sick for another week. This week, we asked again through our site manager. Now the plumber mentioned a processing time of 8 weeks because the heating/floor heating company has to handle it.
Since the company is currently busy with major renovations, I assume they simply don’t want to take on this "extra task" dictated by the client. I expect to receive a refusal offer in two weeks.
Therefore, I would like to kindly ask again how expensive the additional piping was for you?
As a reminder: During the shell inspection in mid-August, the managing director said that reducing the heating load calculation from 35°C to 30°C (95°F to 86°F) was not a big deal. However, the responsible employee at the company has been on vacation for one week and then sick for another week. This week, we asked again through our site manager. Now the plumber mentioned a processing time of 8 weeks because the heating/floor heating company has to handle it.
Since the company is currently busy with major renovations, I assume they simply don’t want to take on this "extra task" dictated by the client. I expect to receive a refusal offer in two weeks.
Therefore, I would like to kindly ask again how expensive the additional piping was for you?
fromthisplace schrieb:
The extra costs are simply due to more materials for the piping and more hours because of the tighter bends, right?
How much do you estimate this amount to be?
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fromthisplace19 Sep 2022 17:14Our plumber is planning the heat pump’s supply temperature at 35°C (95°F) with pipe spacing consistently at 20 cm (8 inches).
I then requested a cost calculation for approximately 30°C (86°F). (see attachment)
I received this without further explanation. Before discussing it with him, I would like to clarify the following points:
1) I understand that the item "Length" refers to the planned pipe length for the room. If multiple heating circuits are planned there, do I need to multiply the "Length" by this number? Is that correct?
2) I understand that more materials (pipes, manifolds, fixing clips) and more labor add to the cost. Am I missing anything?
3) If I have understood 1) correctly, I arrive at a total length of 1,059.71 m (3,478 ft) and 17 heating circuits at 35°C (95°F), and 1,929.2 m (6,331 ft) and 27 heating circuits at 28°C (82°F) supply temperature. The difference is 869.49 m (2,853 ft) of pipe and 10 more heating circuits.
In terms of cost, where should we expect the price for this additional performance to be at the current stage? Will the construction costs increase significantly or is this trade unaffected?
I then requested a cost calculation for approximately 30°C (86°F). (see attachment)
I received this without further explanation. Before discussing it with him, I would like to clarify the following points:
1) I understand that the item "Length" refers to the planned pipe length for the room. If multiple heating circuits are planned there, do I need to multiply the "Length" by this number? Is that correct?
2) I understand that more materials (pipes, manifolds, fixing clips) and more labor add to the cost. Am I missing anything?
3) If I have understood 1) correctly, I arrive at a total length of 1,059.71 m (3,478 ft) and 17 heating circuits at 35°C (95°F), and 1,929.2 m (6,331 ft) and 27 heating circuits at 28°C (82°F) supply temperature. The difference is 869.49 m (2,853 ft) of pipe and 10 more heating circuits.
In terms of cost, where should we expect the price for this additional performance to be at the current stage? Will the construction costs increase significantly or is this trade unaffected?
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fromthisplace19 Sep 2022 17:41The additional costs are estimated to be 3,980 euros. I do not have a detailed breakdown of individual items.
What do you think: Is this fair? Is the investment worthwhile over the lifetime of the heating system?
What do you think: Is this fair? Is the investment worthwhile over the lifetime of the heating system?
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SaniererNRW12319 Sep 2022 18:46fromthisplace schrieb:
What do you think about this: Fair?In my opinion, the price increase is fair. For DIYers purchasing materials online, the extra cost already exceeds 1,000€ (about $1,100). These are the cheapest online prices, not premium branded materials or standard wholesale prices. Plus, the installation time is nearly doubled. If it fits your budget, go for it. In my view, it has many advantages and only one disadvantage.
Advantages:
- More comfortable floor, as it is not as warm (yes, some women complain that the floor is no longer "nicely" warm...)
- Energy savings
- Less demand on the heat pump = less strain on the system
- Future-oriented, beneficial when reselling the house
- Reduces your home's carbon footprint
Disadvantages:
- Costs more money
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