Many heat pumps used in Ohio and Michigan are water source for comfort heating and cooling. Today, we want to look at the opportunity to …
Heat Pump Water Heaters: Water Source Units (Part 12)
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 …
Heat Pump Water Heaters: Drive Down First Cost Using Hybrid Solutions (Part 11)
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 …
Sump and Sewage Pump Flow Rate & Minimum Run Time
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 …