Articles by Joanna R. Turpin

Retrocommissioning refers to identifying improvements that can increase the energy savings and performance of existing buildings. Considering that about half of all commercial buildings in the U.S. were constructed before 1980, it’s easy to see why there is a growing demand for contractors who offer retrocommissioning.

Chillers have long been the HVAC systems of choice for large commercial buildings and other facilities, but they are facing fierce competition from new technologies, such as VRF systems, which are frequently considered to be easier to install and maintain.

While modeling software is often used for the initial design of high-performance buildings, the on-going benchmarking, commissioning, and monitoring of these structures is usually the purview of a building automation systems (BAS).

HVAC systems in commercial buildings consume a lot of energy, which is why many building owners and managers are looking at replacing their older, inefficient equipment with new high-performing systems.

Variable refrigerant flow (VRF) technology is relatively new to the U.S., yet it has quickly become a very popular option in the commercial market. VRF is now moving into the residential market as well.

Energy efficiency ratings (SEER/EER) of air conditioners and heat pumps keep rising, thanks to new technologies such as electronically commutated motors (ECMs), inverter-driven compressors, and advanced heat exchangers. These technologies have helped boost high-end cooling equipment ratings to the mid-20-SEER range, which was unthinkable just a few years ago.

Manufacturers often offer longer warranties and hefty rebates as a way to entice homeowners to purchase more expensive HVAC systems. Rebates and tax credits are also sometimes offered by federal, state, and local governments and utilities as a way to encourage consumers to reduce their energy use by purchasing newer, more efficient equipment.

Ductless heat pumps have taken the U.S. by storm with sales increasing by double digits over the last few years. That momentum is expected to continue; however, not every homeowner wants to look at wall-mounted units in their living spaces.

Today’s heat pumps offer a wide range of advanced features that satisfy consumers’ demands for supreme comfort and energy savings as well as contractors’ desires for easier installation and service. And, with consumers demanding even greater energy savings and comfort control, they are already hard at work on the next generation of heat pumps.

Improper installation of heat pumps may increase household energy use for space heating and cooling on the order of 30 percent over what it should be.