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Comet Boiler & Aquair Warm Air Unit

  • Solution for Replacing Warm Air Heating
    • Replaces electric & gas warm air units
    • Combines EHC electric boilers with Aquair water-to-air space heater
  • Unique Aquair Design
    • Only product that can replace warm air heater in single dwelling
    • Fully utilizes existing warm air ducting
    • Integrates with centralized heating source
  • High Output
    • Calculated using minimum 80°C flow temperature
    • Lower temps can be used with reduced output
  • Cost-Effective Replacement
    • Efficient solution for replacing electric warm air units
    • Ideal for installers without DAH1 certificate
  • Space-Saving Installation
    • Boiler and Aquair HIU combination saves space
  • Improved Air Quality (Optional)
    • ‘Cleanflow’ electronic air filter reduces respiratory issues
    • Provides cleaner air vs older heating systems
  • Benefits
    • Minimum disruption to current installation
    • New, improved heating system
    • Centralized heating advantages

The Aquair water-to-air solution combined with EHC boilers offers an innovative, high-quality replacement for outdated electric and gas warm air units.

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Contact a member of our team to learn more!


At EHC we recognise the growing demand for eco friendly heating and hot water solutions and all of our products are designed with this in mind.

Owing to the fact that Electric Boilers can be run from renewable resources such a solar power, it means that your boiler will run completely free from CO2 emissions.

Electric Boilers are also 100% efficient which means that for every 1kW of electricity you use, you will receive 1kW of heat.

Moving to electric is easy, as you don’t need to replace any of your existing pipework or radiators.

By 2050 the UK Government aim to generate emission-free electricity. Electric Heating will be a major facilitator in reaching this goal and in 2020 the Government pledged 40GW of wind generated electricity in the UK by 2030. This is enough electricity to power every household in the UK!

By moving to Electric Heating, with a renewable energy tariff you’ll not only be moving to carbon-free heating, but doing your bit to heat for a renewable future!














Comet Features

  • 100% efficient
  • Integral sealed system kit
  • Virtually silent in operation
  • Suitable for central heating only or central heating & hot water
  • Suitable for Underfloor Heating
  • 6 Stage Heating
  • Stainless Steel Heat Exchanger
  • 5 Year Warranty (T&C’s Apply)
  • Volt-Free Control Connections
  • Integral System Diagnostics
  • Easy-Fit Connectors & Sensors
  • In-Built Fault Finding Diagnostics
  • High Current Thermal Cut-Out
  • Vortex Flow Temperature Sensor
  • Digital Pressure Gauge
  • ErP Smart Pump
  • Removable bottom tray

Aquair Features

  • Can utilise existing warm air ducting
  • Currently the only product on the market for Electric Warmair Replacement
  • Air Filter
  • Can replace Gas or Electric Warm Air Unit
  • No Flue Requirement
  • PCB Control Board
  • Rapid Heat Up Times
  • Easy-Fit Connectors & Sensors
  • Minimal Disruption to your Home
  • No Mandatory Maintenance required

Clearflow Filter

On a warm air system, the air within the dwelling passes across the air filters around 6 times per hour which presents the perfect opportunity to electronically clean the air in order to remove smaller particles such as pollen, mold and tobacco smoke which a standard filter will not absorb.

With the optional ‘Cleanflow’ electronic air filter fitted the occupant not only benefits from a new & improved heating system but also cleaner air which helps to reduce and eliminate respiratory issues effected by older heating systems.

The Cleanflow Filter is ideal for houses with pets, smokers, and people suffering from asthma and other bronchial conditions.

Warm Air Heating Only

For properties only requiring the replacement of their Gas or Electric Warm Air Unit the Comet Electric Boiler & Aquair HIU package is the perfect combination. The Aquair HIU is unique in its design and versatility and will provide all the benefits that centralised heating systems offer.

There is no other product on the market that can replace a warm air heater in a single dwelling, fully utilising the existing warm air ducting and be integrated into a centralised heating source.

10, 16 and 20 are suitable for upflow or downflow applications. Models 25 & 36 are downflow applications only.


The Standard Warm Air package Includes

  • Comet Electric Boiler
  • Aquair HIU
  • Single Channel Programmer
  • Room Thermostat
  • Wiring Centre
  • Filling Loop
  • Plenum Adapter Kit
warmair kit cw cylinder

Warm Air With Unvented Cylinder

If both Warm Air and Hot Water requires to be upgraded then look no further, EHC can offer a comprehensive package containing our standard Warm Air kit along with a Direct Unvented Cylinder Of your Choice.

This value-for-money package includes

  • Comet Electric Boiler
  • Aquair HIU
  • Direct Unvented Cylinder
  • Single Channel Programmer
  • Room Thermostat
  • Wiring Centre
  • Filling Loop
  • Plenum Adapter Kit
  • DHW Expansion Vessel
  • DHW Programmer
  • 2 x 3kW Immersion Heaters
  • 15mm / 22mm Tundish
  • Inlet Control Set
  • Temperature & Pressure Relief Valve
  • Installation & Maintenance Instructions
  • Benchmark Logbook

Warm Air With On Demand Hot Water

For smaller one & two bed properties looking to replace their current Warm Air Unit and whilst being attracted to on demand hot water the Astro Warm Air package may be the option you are looking for.

With superior performance and reliability, the Fusion Astro Electric Combi Boiler provides on demand and instantaneous domestic hot water. They are suitable for small Properties that have a Shower and Hot Water outlets for sinks.

Incorporating the latest technology, the Fusion Astro Combi Boiler provides complete peace of mind for reliability, performance and safety.


This On Demand Package Includes

  • Astro Electric Combi Boiler
  • Aquair HIU
  • Single Channel Programmer
  • Room Thermostat
  • Wiring Centre
  • Filling Loop
  • Plenum Adapter Kit
  • Installation & Maintenance Instructions

EHC - The Electric Boiler Specialists

  • Installation is quicker than a gas system
  • The wiring of an Electric Boiler is the same as an Electric Shower
  • Electric Boilers can be used for Open Vented Systems
  • Can be used as back-up for Heat Pumps
  • Standard radiators and valves can be used with Electric Boilers
  • EHC Electric Boilers have a soft start to avoid power surges
  • Electric Boilers are almost silent when operating
  • Electric Boilers emit no noxious fumes or gases
  • Can be used with underfloor heating systems
  • EHC only use and recommend High Efficiency ErP Smart Pumps



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Company Number: SC289495

VAT Number: GB442070921

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01698 820533

Block 5, Unit 40, Third Road, Blantyre Industrial Estate, Blantyre, South Lanarkshire G72 0UP
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