Chronomite SR-30/277 HTR 277-Volt 30-Amp Review (2026): A Spec-Based Look
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This chronomite sr 30 277 htr 277 volt 30 amp review covers a compact, instant-flow tankless water heater designed for specific electrical setups. It operates on 277-volt power and delivers a maximum flow rate of 1.0 GPM. The unit measures 6.25 x 2.75 x 9.63 inches and weighs 11 pounds. Its small footprint allows for easy installation in tight spaces. You get two chrome compression fittings and a rear electric knock-out for flexible wiring. This model is an electric solution for point-of-use applications where space is limited.
What stands out
- 277-volt electric operation for compatible electrical systems
- 1.0 GPM flow rate ideal for single fixtures
- Compact dimensions of 6.25 x 2.75 x 9.63 inches
- Two mounted chrome compression fittings for easy connection
- Rear electric knock-out for wiring flexibility
Who it fits
Good fit for
You should choose this unit if you need a dedicated hot water source for a single sink or bar area. The 1.0 GPM flow rate is sufficient for hand washing or light dish rinsing. Its small size fits well under counters or in tight utility closets. If your electrical system supports 277 volts, this heater provides reliable, on-demand hot water without taking up much space. It is not designed for whole-house use.
Who should skip it
Skip this model if you need hot water for multiple fixtures simultaneously. The 1.0 GPM limit is too low for showers or bathtubs. It also requires a 277-volt electrical supply, which is less common in standard residential settings. If you need higher flow rates or standard 120/240-volt compatibility, look for a different unit. This heater is strictly for low-demand, point-of-use scenarios.
Verdict: This compact heater is a practical choice for low-flow, point-of-use applications in 277-volt systems. It fits well in tight spaces but is not suitable for higher-demand household needs.
Key specs explained
Voltage: 277-Volt
This unit requires a specific 277-volt electrical circuit, which is common in commercial settings or specific residential installations. You cannot plug this into a standard 120-volt outlet. Verify your building’s electrical infrastructure matches this requirement before installation. Using the wrong voltage can damage the heater or create safety hazards. It is designed for dedicated circuits, so you need a qualified electrician to ensure your wiring supports this load safely.
Flow Rate: 1.0-GPM
The heater delivers one gallon of hot water per minute. This flow is suitable for single-point applications like kitchen sinks, bar sinks, or small lavatories. It is not sufficient for showers or tubs, which typically require higher flow rates. If you need hot water for multiple fixtures simultaneously, this unit will struggle. It is ideal for under-sink installations where low demand is expected.
Dimensions: 6.25" x 2.75" x 9.63"
The unit is compact, measuring just over six inches tall and nearly three inches wide. This small footprint allows it to fit easily under sinks or in tight utility closets. You can mount it on a wall without taking up much floor space. Check your available clearance to ensure the unit fits your planned location. The small size makes it unobtrusive in residential or commercial kitchen environments.
Fuel Type: Electric
This heater uses electricity to heat water instantly, with no gas lines or venting required. You do not need to install exhaust flues or gas piping, simplifying the installation process. It produces no combustion gases, making it safer for indoor use in confined spaces. However, it relies on stable electrical supply. Ensure your electrical panel has enough capacity to handle the 30-amp draw without tripping breakers.
Design and build analysis
According to the listing, the Chronomite SR-30/277 HTR features a compact, rectangular chassis with a white finish. Its dimensions are 6.25 inches in height, 2.75 inches in width, and 9.63 inches in length. This small footprint allows it to fit into tight utility spaces or under counters where larger units would not. The unit weighs 11 pounds, making it lightweight for mounting purposes. You can secure it to a wall using standard hardware, though you must verify the wall can support the load.
The exterior is finished in white, which blends with standard utility rooms or commercial kitchen environments. The design prioritizes function over aesthetics, with a clean, uncluttered surface. There are no visible digital displays or complex control panels on the front. This simplicity reduces potential points of failure and keeps maintenance straightforward. You interact with the unit through its electrical connections rather than manual dials.
Connection points include two mounted chrome compression fittings for water supply. The inlet and outlet connections are 3/8-inch, which is standard for many residential and light commercial sink applications. A rear electric knock-out is provided for wiring access. This layout keeps wires protected inside the unit while allowing easy access for a licensed electrician. The compact size and specific connection types make this unit ideal for point-of-use installations at kitchen sinks or bar sinks, where space is limited and flow demands are moderate.
Setup and everyday use details
Installation requires careful attention to electrical and plumbing specifications. This unit operates on a 277-volt circuit, which is not standard for typical residential outlets. You must ensure your building’s electrical infrastructure supports this specific voltage before proceeding. The unit draws 30 amps, so your wiring and breaker must match these requirements to operate safely. The listing indicates two mounted chrome compression fittings for connection. These fittings have a 3/8-inch diameter for both the cold water inlet and outlet. This size is standard for many kitchen and bar sink lines, but you should verify your existing plumbing matches these dimensions. The unit weighs 11 pounds, making it manageable for wall mounting, though you need secure anchors due to the water weight. The compact dimensions of 6.25 by 2.75 by 9.63 inches allow it to fit in tight spaces under sinks. A rear electric knock-out provides an option for cable entry if needed. In daily use, this heater delivers a maximum flow rate of 1.0 GPM. This output is sufficient for single fixtures like kitchen sinks, bar sinks, or individual lavatories. It is not designed to supply water to multiple fixtures simultaneously. The instant-flow design means water heats as it passes through, providing continuous hot water without a storage tank. You get hot water immediately upon turning the tap, assuming the electrical and plumbing connections are correct. The white finish blends into most utility areas or under-sink cabinets without drawing attention.
Before You Buy This Unit
You need a dedicated 277-volt circuit for this heater. Standard home outlets do not work here. You must verify your electrical panel supports this specific voltage. The unit connects via 3/8-inch compression fittings. You will need compatible plumbing parts for installation. Two chrome fittings are mounted, but you must provide the supply lines. The 1.0 GPM flow rate is low. It suits single sinks or bar areas only. Do not expect it to serve showers or multiple taps. You should check local codes for commercial versus residential use. The compact size helps, but placement matters. You need access for maintenance. The white finish is durable, but keep it clean. This model is one of 1 options here. It fits niche roles where space and specific voltage are constraints. Other choices offer higher flow or standard voltages. Choose this only if your setup matches its exact requirements. Otherwise, look for a 120-volt or higher GPM alternative.
Check before you buy
- Confirm 277-volt electrical circuit availability in your building.
- Verify 3/8-inch plumbing connections match your supply lines.
- Ensure 1.0 GPM flow suits your single sink needs.
- Check local codes for commercial or residential installation rules.
The product at a glance
Chronomite Instant-Flow 277V Electric Water Heater
Best for: single sink applications with 277V power
- Fuel Type
- Electric
- Flow Rate
- 1.0-GPM
- Voltage
- 277-Volt
- Dimensions
- 6.25" x 2.75" x 9.63"
- Weight
- 11 pounds
View on Amazon: Chronomite Instant-Flow 277V Electric Water Heater Affiliate link
This Chronomite unit is a 277-volt electric tankless water heater designed for point-of-use applications. It delivers a flow rate of 1.0 GPM and measures 6.25 x 2.75 x 9.63 inches. The compact white body weighs 11 pounds. It includes chrome compression fittings and 3/8-inch connections. This model suits kitchen sinks, bar sinks, or dual lavatories where space is limited and specific voltage is available.
Pros
- Compact dimensions of 6.25 x 2.75 x 9.63 inches
- 1.0 GPM flow rate for single-fixture use
- Includes two mounted chrome compression fittings
- Rear electric knock-out for flexible wiring
Cons
- Requires 277-volt electrical supply
- Limited to 1.0 GPM flow rate
- Uses 3/8-inch connection size
Good fit if
- You need a heater for a kitchen or bar sink
- You have a 277-volt electrical circuit available
- You require a compact unit under 10 inches tall
Skip if
- You need hot water for multiple simultaneous fixtures
- Your home only provides 120-volt or 240-volt power
- You require flow rates above 1.0 GPM
Verdict: Chronomite SR-30 277V 1 GPM Heater fits small sinks needing dedicated hot water. It works well for bar sinks or single lavatories where 277-volt power is present. The compact size helps in tight spaces.
Specifications side by side
| Spec | Chronomite Instant-Flow 277V Electric Water Heater |
|---|---|
| Fuel Type | Electric |
| Flow Rate | 1.0-GPM |
| Voltage | 277-Volt |
| Dimensions | 6.25" x 2.75" x 9.63" |
| Weight | 11 pounds |
| Color | White |
| Model | SR-30/277 HTR |
Frequently asked questions
What is the maximum flow rate of the Chronomite SR-30/277 HTR?
This unit delivers a maximum flow rate of 1.0 GPM. This output is sufficient for single-sink applications. It works well for bar sinks or small lavatories. The instant-flow design ensures you receive hot water immediately without waiting for a tank to fill.
Does this water heater require a special electrical connection?
Yes, it requires a dedicated 277-volt circuit. You cannot plug it into a standard 120-volt household outlet. This voltage is common in commercial settings or specific residential installations. You must verify your building’s electrical infrastructure supports this requirement before attempting installation.
How big is the Chronomite SR-30/277 HTR?
The unit measures 6.25 inches in height, 2.75 inches in width, and 9.63 inches in length. This compact footprint allows it to fit into tight spaces. It is designed to be installed near the sink it serves, minimizing heat loss in the plumbing lines.
What plumbing fittings does this model use?
The unit connects via 3/8-inch compression fittings. You will need compatible plumbing parts to complete the installation. Ensure your existing pipes match these connection sizes. Proper fitting selection is critical for a leak-free and secure water supply connection to the heater.
Is the Chronomite SR-30 suitable for whole-house use?
No, it is best for single-sink applications. The 1.0 GPM flow rate is too low for multiple simultaneous fixtures. It fits small sinks needing dedicated hot water. Use this unit for bar sinks or single lavatories where space and power are limited.
What is the weight of this tankless water heater?
The unit weighs 11 pounds. This light weight makes mounting easier. It can be securely attached to a wall using appropriate hardware. The compact size and low weight help in tight spaces where heavier units might not fit or be difficult to install.