Is anyone pre-buying this year?

 
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Rob R.
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Post by Rob R. » Fri. Jan. 13, 2023 1:26 pm

The combo units are lower cost and more likely to be the low bid (and get the green light from the homeowner).

I thought you had a heat pump water heater? Or is that someone else?

 
k-2
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Post by k-2 » Fri. Jan. 13, 2023 2:52 pm

Rob R. wrote:
Fri. Jan. 13, 2023 1:26 pm
The combo units are lower cost and more likely to be the low bid (and get the green light from the homeowner).
I thought you had a heat pump water heater? Or is that someone else?
I do. But limited space to install more appliances. Plus if i have to pay a meter charge all year round i may as well use the gas 12 months a year instead of 6 months just for heat. And another factor is ,i plan to sell the house in the near future so i have to put in something automatic. No way im installing anything oil, so gas in the only other viable choice and right now not much different than coal in cost of fuel. Ill be taking the coal boiler out when i sell.

 
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Rob R.
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Post by Rob R. » Fri. Jan. 13, 2023 3:23 pm

My point was that you could install a heat-only gas boiler that is sized to heat the house and let the heat pump unit continue to provide DHW.


 
k-2
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Post by k-2 » Fri. Jan. 13, 2023 7:15 pm

Rob R. wrote:
Fri. Jan. 13, 2023 3:23 pm
My point was that you could install a heat-only gas boiler that is sized to heat the house and let the heat pump unit continue to provide DHW.
Im considering all options right now. The new unit would have to go right where the HPWH is so that would have to come out anyway. My installer who is an old friend said of all the combo units he has installed up to this point the only one he ever had problems with was a Bosch. He will be installing one(probably a Rheem) in my daughters house in a few weeks to replace an oil burning furnace and a leaky electric water heater.

 
k-2
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Post by k-2 » Sat. Jan. 14, 2023 1:31 am

Iv noticed that even the tankless gas Water heaters are very high btus. Where as in the past a typical 30 gallon gas WH was 30,000 BTUs a new tankless model is more like 130,000 BTUs. So combining both home heat and domestic hot water is why avg combination boiler is 180,000 to 200,000 Btus.
Heres a regular tankless water heater. Its 130000 Btus.
https://www.homedepot.com/p/Rinnai-Super-High-Eff ... 9-23-12140

 
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Rob R.
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Post by Rob R. » Sat. Jan. 14, 2023 7:12 am

Yes, making DHW in real time takes some serious BTUs. My house often has two showers running at one time, I would need one of the larger units.

Something else worth noting about the tankless units, they are much more sensitive to the mineral content of the water.


 
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Post by hotblast1357 » Sat. Jan. 14, 2023 7:17 am

Why would you take out the air to water heat pump?

Have you considered a heat pump domestic water heater?

 
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Post by k-2 » Sat. Jan. 14, 2023 12:02 pm

hotblast1357 wrote:
Sat. Jan. 14, 2023 7:17 am
Why would you take out the air to water heat pump?
Have you considered a heat pump domestic water heater?
The gas unit has to go right where the HPWH is located and the Coal has to come out to sell the property. The HPWH is getting old anyway. Whether i install the coal in the new property depends on the heat source already there.

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