![\"Axinar](\"https:\/\/axinar.com\/wp-content\/uploads\/2025\/12\/axinar-pellet-boiler-pelit-15-automatic.webp\")
<\/p>\nWhich is the best wood boiler?<\/strong> Which is the best pellet boiler?<\/strong> And which is the most economical biomass boiler?<\/strong> These are among the most common questions we receive at our technical support.<\/p>\n The honest answer: there is no single “best” or “most economical” boiler that fits everyone<\/strong>. Each installation has its own characteristics, floor area, building insulation, climate zone, domestic hot water requirements, radiator type, ceiling height, and budget. A 30 kW boiler that is ideal for a 150 m\u00b2 home in Athens with good insulation will be undersized in an identical 150 m\u00b2 home in northern Greece with old windows.<\/p>\n The right boiler is the one that fits your<\/em> need.<\/p>\n The following guide shows how to select the correct power per square meter, with cost tables and specific Axinar pellet and wood boiler models from 20 to 250 kW.<\/p>\n<\/div>\n Actual values depend on insulation, zone, ceiling height, and domestic hot water needs.<\/p>\n<\/div>\n The basic calculation formula is:<\/p>\n Power (kW) = Area (m\u00b2) \u00d7 Coefficient (kW\/m\u00b2)<\/strong><\/p>\n The coefficient depends on two main factors: building insulation<\/strong> and climate zone<\/strong>.<\/p>\n Home 150 m\u00b2, medium insulation, Thessaloniki (Zone C)<\/strong>:<\/p>\n Recommended models: Axinar PELIT PL30 (30 kW),<\/a> 1.768\u20ac or Axinar BM30 Wood (30 kW),<\/a> 2.170\u20ac.<\/p>\n Pellet boilers have stable efficiency of 90-93%, so theoretical power translates to actual heating. Axinar produces three lines:<\/p>\n\n
How to Calculate Boiler Power<\/h2>\n
Insulation coefficients<\/h3>\n
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\n \nBuilding type<\/th>\n kW \/ m\u00b2<\/th>\n<\/tr>\n<\/thead>\n \n New construction, energy class A+ (KENAK)<\/td>\n 0.08 – 0.10<\/td>\n<\/tr>\n \n Well insulated, energy class B<\/td>\n 0.10 – 0.13<\/td>\n<\/tr>\n \n Medium insulation (homes built 1990-2010)<\/td>\n 0.13 – 0.17<\/td>\n<\/tr>\n \n Old construction, no insulation<\/td>\n 0.18 – 0.25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Greek climate zones<\/h3>\n
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\n \nZone<\/th>\n Regions<\/th>\n \u00d7<\/th>\n<\/tr>\n<\/thead>\n \n A (southernmost)<\/td>\n Crete, Rhodes, Aegean islands, Laconia<\/td>\n 0.85<\/td>\n<\/tr>\n \n B<\/td>\n Attica, Peloponnese, S. Epirus<\/td>\n 1.00<\/td>\n<\/tr>\n \n C<\/td>\n Thessaloniki, Central Macedonia, Thessaly<\/td>\n 1.10<\/td>\n<\/tr>\n \n D (northernmost)<\/td>\n W. Macedonia, mountainous Epirus, Drama, Evros<\/td>\n 1.25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Sample calculation<\/h3>\n
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Pellet Boilers, Selection Table<\/h2>\n
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\n \nArea<\/th>\n Power<\/th>\n PELIT (base)<\/th>\n PelletWork (integrated)<\/th>\n<\/tr>\n<\/thead>\n \n 60-100 m\u00b2<\/td>\n 8-20 kW<\/td>\n \n
![\"CL8\u201332\"](\"https:\/\/axinar.com\/wp-content\/uploads\/2025\/05\/Axinar-CALOS-CL8\u201332-All-in-One-\u039c\u03bf\u03bd\u03ac\u03b4\u03b1-Pellet-8\u201332kW-\u03bc\u03b5-\u0391\u03c5\u03c4\u03cc\u03bc\u03b1\u03c4\u03bf-\u039a\u03b1\u03b8\u03b1\u03c1\u03b9\u03c3\u03bc\u03cc.webp\")
<\/div>\n![\"PW20\"](\"https:\/\/axinar.com\/wp-content\/uploads\/2025\/05\/1.pelletwork-pellet-boiler.webp\")
<\/div>\n![\"PL20\"](\"https:\/\/axinar.com\/wp-content\/uploads\/2025\/05\/1.-pelit-pellet-boiler.webp\")
<\/div>\n![\"PSK30\"](\"https:\/\/axinar.com\/wp-content\/uploads\/2025\/05\/peskon-wood-boiler-axinar.webp\")
<\/div>\n![\"BM30\"](\"https:\/\/axinar.com\/wp-content\/uploads\/2025\/05\/1.bm-wood-boiler-axinar.webp\")
<\/div>\n![\"e_BM_e90\"](\"https:\/\/axinar.com\/wp-content\/uploads\/2025\/05\/1.bm-e-wood-boiler-axinar.webp\")
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