Trial Launch:

COLD. Cooling for MVHR Systems

Now available for early access in New Zealand and Australia
We’re piloting the rollout of COLD.’s quiet, efficient cooling recovery systems for high-performance homes...

Why COLD.?

Standard MVHR systems are great at recovering heat — but not humidity. In summer, they can end up supplying hot and humid air, which makes indoor spaces stuffy and uncomfortable. Traditional fixes like wall-mounted AC or split systems in each room are often noisy, inefficient, and expensive.

The COLD. Difference

COLD. units work with your MVHR to cool and dehumidify incoming air before it's delivered to rooms. That means:

  • Lower temperature + lower humidity = more comfort and better indoor air
  • No drafts, no fan noise = whisper-quiet performance
  • Works with your existing MVHR system (new or retrofit)

How It Works

COLD.W – Water Coil Cooler

Connects to a hydronic heat pump system. Cools and dehumidifies air, ideal for homes with radiant floor heating.

COLD.X – DX Coil Cooler

Connects to a split AC outdoor unit. Simple install with direct expansion cooling and humidity control.

COLD.R – Recovery Add-On

For retrofit or non-insulated ducts. Gently raises air temp after cooling to prevent condensation issues.

Best For

  • Passive House & Homestar projects
  • Builders designing low-energy homes
  • HVAC pros who value comfort, simplicity, and quiet operation
  • Clients who want ducted cooling without split systems everywhere

Cold W

  • Keeping your home comfortable by cooling and dehumidifying the supply air. COLD.W is a water duct heat exchanger intended to be used with a central MVHR unit or standalone fan.

Cold X

  • Keeping your home cool by cooling and dehumidifying the air going to the dwelling. COLD.X is a direct expansion duct cooler (condenser – heater) intended to be used with a central MVHR unit or standalone fan.

Cold R

  • COLD.R is air heat recovery exchanger used in case of existing MVHR installation, where supply distribution system cannot be insulated. COLD.R raises the leaving air temperature from COLD.W or COLD.X unit to around 18°C. This is normally above the dew point of air inside the building and with that condensation forming on the outside of the ducts and elements of distribution system is prevented.

Register Your Interest

If you're a builder, architect, HVAC installer or homeowner interested in learning more, leave your details and we'll be in touch.