Sutherland Tables

Field Modelling tool for Replacement Boiler Sizing, Comparative Running Costs & Carbon Emissions.

All fields are required except where indicated. Results will appear at the bottom of the page.

Main property

Contact details
Property location
External details
Number of external walls to front/rear
Front/Rear
Number of external walls to gable end/side
Gable end/Side
Internal details
Room height floor to ceiling
Number of floors in dwelling
Number of Party walls to Gable end/Side
Number of party walls to Front/Rear
Number of open chimneys
The number of wall on the front or rear which border with the part that is being extended.
The number of wall on the gable or end which border with the part that is being extended.
Insulation and other details
Heating system
Is existing system wired for DHW priority?
Enter 0 allowance for combi boiler