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Heat Pump Water Heaters: Water Source Units (Part 12)

Norm Hall November 7, 2022Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Heat Pump Water Heaters, Monday Morning Minutes

Many heat pumps used in Ohio and Michigan are water sources for comfort heating and cooling. Today, we want to look at the water source …

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Water HeatersHydronicsNorm Hallflow rateDelta T

Heat Pump Water Heaters: Drive Down First Cost Using Hybrid Solutions (Part 11)

Norm Hall October 31, 2022Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Heat Pump Water Heaters, Monday Morning Minutes

The owner of a local engineering firm recently said to me, “First cost and space are key discussion points in any building design.” First cost …

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Hydronicspumpshydronic systemshydronic systemWater Heaters

Sump and Sewage Pump Flow Rate & Minimum Run Time

Norm Hall October 24, 2022Monday Morning Minutes, Pumps, Plumbing System Design, Sump and Sewage Systems, Pumps, Sump and Sewage, Basins/Tanks, Control

The minimum run time in a sump, effluent, or sewage pump is determined by the flow rate and the volume of water in the basin …

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elephant in room
elephant in room

Heat Pump Water Heaters: Example Apartment Building Costs (Part 10)

Norm Hall October 10, 2022Monday Morning Minutes, Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Heat Pump Water Heaters

Your client is interested in a commercial R-744 refrigerant heat pump water heater solution. The example system I used in this blog is an apartment …

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Water HeatersNorm HallASHRAE
elephant in room
elephant in room

Heat Pump Water Heaters: Example Apartment Building (Part 9)

Norm Hall October 3, 2022Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Monday Morning Minutes, Heat Pump Water Heaters

Air source heat pumps are beginning to get attention in conversations among engineers in the northern climates. I appreciate everyone’s patience as you opened this …

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Water HeatersTanksNorm HallDomestic Hot Water Recirculation Systemshot water recirculationPVI-Water Heaters

Heat Pump Water Heaters: Capacity, COP, and Weather (Part 8)

Norm Hall September 26, 2022Monday Morning Minutes, Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Heat Pump Water Heaters

How will the weather in a northern climate affect the selection of the heat pump water heater with R-744 refrigerant? What about the Coefficient of …

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Water Heaterswater pump water heatersheating
frozen ice
frozen ice

Heat Pump Water Heaters: Standby Capacity (Part 7)

Norm Hall September 19, 2022Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Monday Morning Minutes, Heat Pump Water Heaters

Hot water availability in many commercial and institutional buildings is critical. Engineers also know that these service water systems are generously sized for the peak …

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Water HeatersHydronicsNorm HallDomestic Hot Water Recirculation Systemshydronic systemhot water recirculation
commercial pump water heater
commercial pump water heater

Heat Pump Water Heaters: Hot Water Recirculation (Part 6)

Norm Hall September 12, 2022Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Heat Pump Water Heaters, Monday Morning Minutes

How does the commercial heat pump water heater, using the preferred R-744 refrigerant, handle the domestic hot water recirculation load? The R-744 (carbon dioxide) heat …

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Water HeatersHydronicsNorm Hallhydronic systemsDomestic Hot Water Recirculation Systems

Heat Pump Water Heaters: Parts and Pieces and Storage (Part 5)

Norm Hall September 5, 2022Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Heat Pump Water Heaters, Monday Morning Minutes

What does a commercial air source heat pump water heater look like? Where will it be located and what are the major components that the …

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Water heaterheat pumpswater heater partsstorage tanks
temperatures
temperatures

Heat Pump Water Heaters: Temperatures & Storage (Part 4)

Norm Hall August 22, 2022Water Heaters, Plumbing System Design, Electric, Heat Pump Water Heaters, Monday Morning Minutes, Heat Pump Water Heaters

Commercial heat pump water heaters using R-744 (CO2) refrigerant operate best when attention is paid to the piping and storage tank arrangement. Today, in part …

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PipingPumpsTanksNorm HallExpansion TanksWater Heaters
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    • Glycol Solutions
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