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 …
A Friend Lost and the Lesson We’re Sharing in His Memory
We are saddened to share that our friend and past R.L. Deppmann employee, Chuck Kaiser, was lost while hiking in the Wyoming Rockies. After extensive …
Heat Pump Water Heaters: Example Apartment Building Costs (Part 10)
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 …
Heat Pump Water Heaters: Example Apartment Building (Part 9)
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 …
Heat Pump Water Heaters: Capacity, COP, and Weather (Part 8)
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 …
Heat Pump Water Heaters: Standby Capacity (Part 7)
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 …
Heat Pump Water Heaters: Hot Water Recirculation (Part 6)
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 …
Heat Pump Water Heaters: Parts and Pieces and Storage (Part 5)
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 …
Hydronic Piping – Can it be Too Oversized? Radiant Panel System Example
We recently were asked about the use of ¾” hydronic pipe runouts on a radiant panel system. The contractor had a concern about the long …
Heat Pump Water Heaters: Temperatures & Storage (Part 4)
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 …