Introduction
In 1999, Hannah and Martin Naughton purchased a cottage in County Meath with the intention of renovating and extending it to create a warm, comfortable, and environmentally friendly home. Their journey involved significant upgrades to the heating system, insulation, and overall energy efficiency of the house.

Initial Challenges
The original cottage was cold and drafty, with insufficient heating and hot water supply. The Naughtons aimed to create a home where they could comfortably walk barefoot, enjoy hot showers, and maintain a warm environment without harming the environment or incurring high energy costs.

Heating System Upgrade
The Naughtons replaced their old oil burner with a Viessmann condensing gas boiler, known for its high efficiency (108-109%). This system separates the heating cycles for radiators and hot water, ensuring consistent hot water supply and efficient heating. Gas was chosen over oil due to its cleaner burn and better regulation.

Radiator and Heat Distribution
They installed Zehnder radiators, which operate efficiently at lower water temperatures, reducing energy consumption and improving air quality by minimizing dust circulation. Each radiator has its own thermostat, allowing for individual temperature control in different rooms.

Insulation and Airtightness
To retain heat, the Naughtons focused on insulation, using 70 mm of Hytherm insulation under floors and 50 mm on walls. They also installed energy-efficient Rationel windows with a U-value of 1.1 to prevent drafts. The house was constructed with a timber frame and insulated with Homatherm holzFlex040 wood fibre, known for its excellent thermal and sound insulation properties.

Airtight Construction
The house was made airtight using the pro clima airtightness system, which includes DB PLUS paper and proprietary tapes and adhesives. This system ensures minimal heat loss and maintains a comfortable indoor climate.

Environmental and Economic Benefits
The Naughtons' efforts resulted in a warm, environmentally friendly home with reduced running costs. The use of natural and efficient materials not only improved comfort but also contributed to sustainability.

Conclusion
After five months in their renovated home, the Naughtons are pleased with the results, having achieved a warm, comfortable, and eco-friendly living space. Their experience highlights the importance of efficient heating systems, proper insulation, and airtight construction in creating sustainable homes.