You have a Bell & Gossett Flo-Control valve on the primary secondary bridge of an older hydronic system. It has been there for over five …
Minimum Boiler Efficiency & New D.O.E. Standards
The United States Department of Energy (DOE) has some minimum efficiency standards which go into effect on January 10, 2023, for Commercial Packaged Boilers. What …
Heat Pump Water Heaters: Chilled Water Source (Part 13)
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 …
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 …