
THE STORY OF THE FIREHEART

THE BIRTH OF THE FIRE HEART
The Firebox fireplace core originated in 1986, when architect and fireplace technology researcher Heikki Hyytiäinen developed the Firebox fireplace core.
The goal was to create a combustion chamber that burns cleanly, efficiently and with as few emissions as possible. An entire fireplace technology was built around the Firebox, on the basis of which we have been manufacturing fireplaces and heaters for almost four decades.



Why was Fireheart founded?
Describe the service and how customers or clients can benefit from it. This is the place to add a short description with relevant details, like pricing, duration and how to book.
CONCEPTUAL PLANNING
Describe the service and how customers or clients can benefit from it. This is the place to add a short description with relevant details, like pricing, duration and how to book.


Why was Fireheart founded?
Describe the service and how customers or clients can benefit from it. This is the place to add a short description with relevant details, like pricing, duration and how to book.
CONCEPTUAL PLANNING
Describe the service and how customers or clients can benefit from it. This is the place to add a short description with relevant details, like pricing, duration and how to book.


HEIKKI HYYTIÄINEN
A PIONEER IN FIREPLACE INFORMATION
Fireplace researcher Heikki Hyytiäinen is a pioneer in Finnish fireplace technology and the founder of Tulisydän fireplaces.
He has dedicated his career to developing energy-efficient and ecological heating solutions, combining traditional fireplace craftsmanship with modern research. Hyytiäinen is known for his innovative solutions that make fireplaces more efficient, durable and user-friendly. His expertise and passion have made Tulisydän fireplaces the warm heart of quality-conscious homes.

.png)

APPRECIATED
EXPERTISE
CONCEPTUAL PLANNING
CONCEPTUAL PLANNING
Heikki and his successor, Iiro Sahramaa, have shared their expertise over the years at numerous construction and fireplace industry events around the world, where they have discussed ecological heating, fireplace design and
about the cleanliness of combustion.


Let's Work
Together
.png)
© 2025 Firebox Heat Oy