Best 27 Kw Tankless Water Heater Guide for Homes, RVs and More
Find the right 27 kW tankless water heater for compact spaces, apartments, or small homes. This guide highlights five top options and explains who each is best for, plus key considerations like electrical requirements, installation, and energy savings. Ideal buyers include apartment renters, tiny-home enthusiasts, DIY remodelers, and anyone needing instant hot water without a bulky storage tank.
Overview: Quick picks for different needs
- Best for Versatility: CAMPLUX 1800W Portable Induction Cooktop & Electric Tankless Water Heater Combo
- Best for Point-of-Use: Westinghouse Apolo Mini 6.5kW
- Best Compact Customization: Eemax EEM24027
- Best Space Savings with Tankless Boost: CAMPLUX 11kW + Mini Tank
- Best for Small Appointments or Sinks: CAMPLUX 1800W combo with quick install
Product snapshot table
| Product | Best For | Key Benefit | Limitations |
|---|---|---|---|
| CAMPLUX 1800W Portable Induction Cooktop & Tankless Combo | Small spaces & RVs | Combo versatility and energy efficiency | Higher power demand may affect other devices |
| Westinghouse Apolo Mini 6.5kW | Under-sink hot water | Compact, easy under-sink fit | Not suitable for showers or multiple fixtures |
| Eemax EEM24027 | Space-saving installs | Continuous hot water with compact design | Single-use focus; check electrical capacity |
| CAMPLUX 11kW Electric Tankless | Small homes with dedicated hot water needs | High flow control and efficiency | Requires more electrical capacity |
CAMPLUX 1800W Portable Induction Cooktop & Tankless Combo
What it is best for: buyers who need an all-in-one solution for compact spaces, including RVs or small apartments, with instant hot water and a quick-cook option. This model emphasizes energy efficiency through self-modulating or rapid-heating tech to reduce energy use by up to 60%. The integrated design helps simplify installation for those who want an appliance-ready setup in under three hours.
Why selected: The combination of hot water and induction cooking in one package can be advantageous for limited spaces where extra appliances are impractical. It suits renters or tiny-home residents who value quick, self-contained setup and easy maintenance.
Who it’s best for: space-constrained buyers who want flexibility for both hot water and on-demand cooking, without sacrificing efficiency. Also appealing to weekend RV travelers who need simple, portable options.
Limitations/caution: The unit relies on two separate circuits; verify electrical service and consider space for both devices in one area to avoid crowding. Not ideal where dedicated kitchen or bathroom hot water is required for multiple fixtures.
Westinghouse Apolo Mini 6.5kW Tankless Water Heater
What it is best for: point-of-use hot water at a single sink or vanity. The compact 6.5 kW design minimizes footprint while delivering immediate hot water for tasks like handwashing or dish rinsing.
Why selected: This unit excels where installation under a sink is feasible and you need a dedicated hot water source without a full tank. It is energy-efficient because it heats water only when needed.
Who it’s best for: homeowners or renters needing reliable instantaneous hot water at a specific location, such as a bathroom vanity or kitchen sink, with a focus on space efficiency.
Limitations/caution: Not suitable for showers or multiple fixtures. Requires professional installation by a licensed electrician and plumber to meet safety and code standards.
Eemax EEM24027 Electric Tankless Water Heater
What it is best for: compact spaces needing a continuous hot water supply with a focus on single-location usage and space efficiency. The unit includes heavy-duty valves and relief components as part of its design.
Why selected: The EEMax line is recognized for space-saving tankless solutions and compliance with compact, high-demand scenarios. It supports continuous hot water when needed, without keeping a full tank heated.
Who it’s best for: small kitchens or bathroom vanities that demand reliable hot water on demand, especially where wall space is limited.
Limitations/caution: Electrical load and circuit protection are critical considerations. Ensure wiring and panel capacity align with the unit’s requirements to avoid tripping breakers or overheating circuits.
CAMPLUX 11kW Electric Tankless Water Heater
What it is best for: higher-demand scenarios where on-demand hot water is needed for a bathroom or kitchen in a smaller home, office, or apartment. The 11 kW rating supports faster heat-up and temperature stability.
Why selected: This model combines fast heating with energy efficiency and a streamlined design. It provides temperature control in 1°F increments, helping to maintain comfort and reduce waste.
Who it’s best for: buyers who plan to run hot water at a single fixture or couple of fixtures with a reliable, compact unit that remains within typical apartment electrical limits.
Limitations/caution: Requires adequate electrical service capacity; verify panel space and circuit availability before installation. Higher kW equipment may necessitate upgraded wiring and breakers.
Buying Guide: Key considerations for 27 kW tankless water heaters
What space and electricity are available? Tankless units rely on significant electrical capacity. Check your panel, required breakers, and whether you need professional wiring upgrades.
What is your hot water demand? If you need hot water at multiple fixtures, opt for a higher-capacity model or plan a staged system with dedicated circuits for each point of use.
Where will it be installed? Under-sink or compact wall-mounted units fit tight spaces but require careful clearance and venting where applicable. Ensure proper mounting and water connections to prevent leaks.
How important is energy efficiency? Look for self-modulating burners or advanced heating controls that minimize standby loss and heat when not needed. This improves overall energy savings over time.
What about maintenance and longevity? Choose models with accessible service ports and corrosion-resistant materials. Regular inspection of connections and valves helps avoid leaks and inefficiency.
Frequently Asked Questions
- What does 27 kW mean for a tankless heater?
It indicates the maximum electrical input the unit can draw to heat water on demand. Higher kW supports greater flow or faster heating, but it also requires adequate electrical service.
- Can I install a tankless heater myself?
Some very small or simple units may be installed by skilled DIYers, but most require licensed electrical and plumbing work to meet safety codes and warranties.
- Will a 27 kW heater supply hot water for multiple fixtures?
Not typically. Many 27 kW units are designed for single-point use or limited fixtures. For multiple outlets, plan a system with multiple units or a higher-capacity solution.
- What maintenance does a tankless system need?
Periodic inspections of valves, connections, and mineral buildup prevention are common. Some units require flushing to remove scale buildup, especially in hard water areas.
- Is tankless water heating more efficient than a traditional tank?
Yes, because water is heated on demand, reducing standby energy loss. The actual savings depend on usage patterns and efficiency features.
- Do I need professional help to choose the right model?
Yes. A professional can assess electrical capacity, plumbing compatibility, and local codes to ensure safe, compliant installation.