Key-card energy savers are sold on a payback claim that is rarely calculated honestly. This page shows you what a hotel lock system really costs per room, what the energy saving genuinely is, and the six mistakes that leave a front desk unable to issue a key.
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Assumes the compressor runs about 35% of the time it is switched on. Saving scales directly with the hours and rate you enter — use your own bill, not ours.
The headline product is rarely more than half the installed cost. These are the parts that get left out of budgets.
One per guest room. Battery powered, with mechanical override key.
Front desk device that writes guest cards. One-time cost regardless of room count.
Issues cards, sets validity, produces audit trails of who opened which door when.
Consumable. Budget replacement — guests keep them, lose them, demagnetise them.
Cuts room power when the card is removed. This is where the electricity saving comes from, not the lock.
Bedside or door panel. Reduces unwanted knocks and improves guest experience measurably.
Same card system extended to in-room devices.
Restricts floor access to guests staying on that floor.
A physical key that opens every door. Essential, and it must be controlled.
The honest trade-offs.
| Consideration | RFID Card | PIN Keypad | Bluetooth / App | Hybrid Card + App |
|---|---|---|---|---|
| Guest issue at front desk | Instant | Instant | Needs guest phone | Instant |
| Works without guest smartphone | Yes | Yes | No | Yes |
| Consumable cost | Cards | None | None | Cards |
| Audit trail | Yes | Yes | Yes | Yes |
| Remote check-in | No | Possible | Yes | Yes |
| Best for | Most Bangladeshi hotels | Budget properties | International business hotels | Upper-tier properties |
| Relative cost | Lowest | Lowest | Higher | Highest |
Measure every door type before ordering. Hotels rarely have uniform doors. Thickness, backset and mortise vary between floors and between original and renovated wings.
Front desk position for the encoder. Needs power, a network point and space at reception. It is used at every check-in.
Energy saver wiring. The saver cuts the room's power circuit, which is electrical work inside the wall. It cannot be retrofitted without access.
Battery access without tools. Housekeeping will change these batteries. If it needs a screwdriver and a manual, it will not happen on schedule.
Mechanical override key control. Every lock needs one, and it opens every room. Decide who holds it and how it is logged before installation.
Network for audit trails. Offline locks store their own logs but must be read manually. Networked locks need a data path to every door.
Batteries are the main recurring cost. Expect 6–10 months per lock in Bangladeshi heat and humidity, rather than the year usually quoted. Across 40 rooms that is a scheduled housekeeping task, not an occasional one.
Cards are consumable. Guests keep them, lose them and demagnetise them against phones. Budget ongoing replacement rather than a one-time purchase.
Encoder and software are one-time, which is why per-room economics improve significantly with property size. A 15-room hotel carries the same setup cost as a 150-room one.
Energy savings are real but modest per room and scale with occupancy. At low occupancy the payback period stretches considerably — the figure above moves sharply when you change the occupancy slider, and that is the honest picture.
The cost nobody plans for: a dead battery at 2am with no accessible override. Every lock we supply has a mechanical key or emergency power port. Confirm your staff know where it is before you need it.
Every one has cost a real project real money.
It depends on tariff, occupancy and guest behaviour. Vendors quote best-case figures as though they were certainties.
Do this: Calculate with your own occupancy and tariff. Treat the result as a range, not a promise.
Hotels have mixed door types between wings and renovations. One measurement is not enough.
Do this: Measure a sample from every wing and floor. Send photos — we confirm fit before you order.
Housekeeping will not do it on schedule if it is awkward. Locks go dead and guests get locked out.
Do this: Specify tool-free battery access and set a rotation schedule rather than waiting for failures.
Every lock has a key that opens the room. Without a control policy it becomes an uncontrolled master key.
Do this: Decide who holds it, where it is stored and how use is logged — before installation.
Every check-in becomes an IT support conversation at reception.
Do this: Card as primary, app as an optional extra on upper-tier rooms if at all.
When a guest reports a missing item, the log of who opened that door and when is the only evidence you have.
Do this: Specify audit logging and confirm how logs are read — offline locks need manual collection.
Specifications, models and pricing sit on the product pages.
Rules we apply on every installation. Share this with your installer.
Commercial tariffs have changed repeatedly. Enter the rate on your latest bill — the calculator's saving is only as good as that number.
Specify savers that read the room card. Generic slot switches accept a business card and save nothing.
The encoder sits where guests check in. Put it anywhere else and staff start issuing pre-encoded master cards.
Every lock has a key cylinder. Control those keys as tightly as the master card.
Locks warn on low battery, but staff miss it. A yearly change on every door costs less than one locked-out guest at midnight.
Hotel locks log every opening. Train the duty manager to pull the log — it settles most theft allegations in minutes.
Locks run ৳12,000–28,000 per door depending on model and finish. On top of that sits a one-time encoder and management software cost of roughly ৳45,000–150,000 regardless of room count — which is why per-room economics improve significantly with property size.
It depends on your electricity tariff, occupancy and guest behaviour. A 40-room property at 65% occupancy with 1.5 kW room AC might avoid a few hundred kWh a month. The saving is real but the commonly quoted payback figures are best-case. Use the calculator above with your own numbers and treat the result as a range.
For most Bangladeshi hotels, RFID cards. App locks depend on every guest having a compatible smartphone, working Bluetooth and willingness to install an app at reception — which turns each check-in into an IT support conversation. A card works instantly for everyone.
Expect 6–10 months in Bangladeshi heat and humidity rather than the year usually quoted. Specify locks with tool-free battery access, because housekeeping will not maintain a lock that needs a screwdriver and a manual — and then guests get locked out.
Every lock we supply has a mechanical override key or an emergency power port that accepts a power bank. Never install a hotel lock without one. Equally important: decide before installation who holds the override master and how its use is logged.
Yes — audit logging is standard. When a guest reports a missing item this log is the only evidence available. Note that offline locks store logs internally and must be read manually with a handheld device, while networked locks report centrally. Confirm which type you are buying.
It depends on how long AC runs with the guest out and your tariff. With 60 rooms, 70% occupancy, a 1.5 kW AC and four idle hours a day, the saving is roughly 2,650 kWh a month. Enter your own numbers above.
Yes. They run on batteries inside the lock, so load-shedding does not affect guest access. The encoder and software need mains or UPS power.
Prices and figures as of September 2026. Confirm with a quotation.
Free site survey across Dhaka and Chattogram. Our engineers confirm the design before anything is quoted.