Temperature-sensitive, this trusty mechanism will ensure the internal temperature of your Greenhouse or Glasshouse is set to your required temperature while removing the need for you to open and close vents.

The Hartley Range of Colors

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  • Hypca White
  • Country Stone
  • Verona Stone
  • Umbria Light
  • The Olive Leaf
  • Mist
  • Vista Grey
  • Iron Grey
  • Forest Green
  • Bronze
  • Manganese Graphite
  • Black Olive
  • Dark Bronze
  • Black
  • Ruby Red

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