Free Tools
Four free interactive tools built by Jonathon to help you plan a stove or chimney job properly. Get a clear answer on what you need — kW size, chimney work required, damage urgency, or the right stove — before you book a survey.
~2 minutes · kW output
What it does: Calculates the exact kW output your stove needs to heat a specific room comfortably. Uses room volume × insulation factor, adjusted for external walls and windows.
Who it's for: Anyone planning a new stove installation or replacing an undersized stove that doesn't heat the room properly.
You'll learn: Recommended kW range, plus practical guidance on which size and type of stove suits your room.
Open Calculator →~3 minutes · 5 questions
What it does: Walks you through 5 questions about your chimney — type, lining, ventilation, room size — and tells you what work is needed before a stove can be safely installed.
Who it's for: Homeowners considering a stove who want to know if their chimney is ready, or what preparation work is required first.
You'll learn: Whether you need a new liner, register plate, air vent, or other preparation — plus suitable stove types for your setup.
Open Checker →~3 minutes · for insurance
What it does: Scores the urgency of damage to your chimney — from routine inspection through to safety-critical — and produces a written summary you can attach to an insurance claim.
Who it's for: Anyone who has had a chimney fire, storm damage, smoke leaking into rooms, or visible cracks in the stack.
You'll learn: Priority level (urgent / high / medium / low), the likely repair scope, and what to do next — including how Jonathon can manage an insurance claim end-to-end.
Start Assessment →~2 minutes · 4 steps
What it does: Matches you to specific stove models based on your fuel preference, style preference, room size, and use case. Recommends real stoves you can actually buy.
Who it's for: Anyone overwhelmed by the choice of stoves on the market who wants a shortlist of 3–5 options that fit their home.
You'll learn: Specific stove recommendations with brand, model, kW output, efficiency, and why each one fits your situation.
Find My Stove →Start with the Chimney Suitability Checker — it tells you what (if any) preparation work is needed. Then run the Stove Size Calculator to find your kW.
Run the Chimney Damage Assessment first — it produces a written summary you can share with your insurer. Then read the Chimney Insurance Claim Guide for the full process.
Use the Stove Selector — answer 4 questions about your fuel, style, room size and use, and get a shortlist of 3–5 matching stoves.
Go straight to the Stove Size Calculator — it's a 2-minute room-by-room calculation.
Yes — completely free, no signup required. Built by Jonathon Roberts, a chimney and stove specialist, to help homeowners across Ireland plan their projects properly.
No obligation at all. The tools give you a clear, honest estimate even if you use another installer. Jonathon's view is that informed homeowners get better outcomes — so the tools are open to anyone in Ireland.
The calculators use proven engineering formulas (kW per cubic metre adjusted for insulation, external walls, and windows) matching industry standards in Ireland and the UK. The chimney checkers use the same checklist Jonathon uses during in-person surveys. For an exact final figure, a free home survey is still the best way to confirm.
Yes — the tools work for any property in Ireland and remain valid for the UK. J.Roberts installs stoves across Leinster and Waterford, and handles chimney repairs and insurance claims nationwide across all 26 counties.
No — results appear immediately. You only enter your phone or email if you want Jonathon to call you back about your specific project. Everything else is optional.
If your project is complicated, urgent, or doesn't fit neatly into one of the tools — give him a call. He responds within a few hours.