MOTORS

Motors represent a prime opportunity for upgrades in multiple places. The shift to electronically commutated motors (ECMs) can bring 20 to 30 percent boosts in efficiency.

Good targets include refrigeration motors (may offer attractive payback) and older guest room fan motors (long run times).

Furthermore, even before a hotel hires a contractor to do the main work, a wise owner will enlist someone to assess the existing motors and identify any incentives to create a benchmark return on investment (ROI) expectation.

MAINTENANCE PLANS

Hotels typically have their own facilities staff, but they often can’t cover everything. The biggest maintenance problems include expansion valves that need adjusting, improper refrigerant charges, and especially dirty air filters. They may outsource inspecting and repairing steam traps, too

“A good maintenance plan reduces costs,” Dan Ruben of Boston Green Tourism said about hotels. “Consider hiring a service company to clean PTACs, VTACs, etc.”

That’s good, reliable revenue for HVAC companies.

DRAIN WATER HEAT RECOVERY

This system makes the most of the “hot” in that hot water going down the guest room shower drain or the back-of-house dishwashers and clothes washers. Paired with storage or not, it saves money by preheating cold water headed to guest showers and, according to the DOE, can be especially helpful if the main water heater is undersized.

INSULATE DUCTS AND HOT WATER PIPES

Before drain water heat recovery, there was good, old-fashioned insulation for hot water pipes. It still works. And in an industry driven by guest satisfaction, it also delivers that desired water temperature a little bit faster.

HEAT RECOVERY

Another way a hotel can minimize those cold shower complaints is to employ a conventional heat exchanger, transferring waste heat from the building’s cooling and refrigeration equipment to the water tank.

CHP CHECKS IN

Combined heating and power (CHP) is often thought of in campus or hospital settings, but it can make sense for hotels, too, especially those over 1,000 rooms or those with exceptional hot water demands. Larger hotels and resorts can wring the most out of the investment in generating electricity on-site and using waste heat to drive a heating/cooling plant. That power flexibility may pay off in customer satisfaction during a general outage as well.

BATHROOM FANS

Unlike the overmatched fans of many buildings, modern fans are quieter and more efficient, and they last longer. Options like motion sensors could build additional savings for a hotel.

HEAT PUMPS

When a boiler develops problems or reaches the end of its natural life, a hotel’s usage profile may make heat pumps an attractive long-term candidate in some areas. Saving mechanical room space is often a possibility, along with the energy conservation.

GUEST ROOM CONTROLS

Hotel guests want to feel “at home,” but they are also attracted to new technology and guest room amenities. Today’s rooms are more integrated and intelligent than ever. Newer thermostats and controllers work with HVAC equipment and security features to turn off systems in unoccupied rooms — a single advancement with enormous budget repercussions spread over time and across a full inventory of rooms.

Chipping away to accomplish even a 10 percent reduction in energy use can yield the same financial effect as increasing the average daily room rate by 62 cents in limited-service hotels and by $1.35 in full-service hotels, according to the DOE.

Publication date: 8/20/2018

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