New Boiler Installation
Worcester and Vaillant combis fitted in a day. Includes flushing, controls, and full system test. 10-year manufacturer's warranty as standard.
Get a quote →Trusted heating engineers serving Grantham and the surrounding villages for 18 years. Same-day callouts, fixed price quotes, and 10-year guarantees on every new install.
Whether it's a dead boiler on a cold morning or a full central heating overhaul, Dave and the team have you covered. Fixed prices, no nasty surprises.
Worcester and Vaillant combis fitted in a day. Includes flushing, controls, and full system test. 10-year manufacturer's warranty as standard.
Get a quote →Not firing up? Losing pressure? Leaking? We diagnose and fix on the first visit wherever humanly possible. No callout fee, no nonsense.
Book a visit →£85 flat. Keeps your warranty valid and catches the small issues before they become big, cold ones. We'll remind you when you're due.
Book a service →CP12 gas safety certificates issued same day. Discounted rates for landlords with multiple properties, full digital paperwork.
Get certified →Sluggish radiators? Cold spots? A proper MagnaCleanse power flush can bring an old system back from the dead. We've saved hundreds of people from full replacements.
Learn more →Nest, Hive, Tado — we fit them all properly and teach you how to actually use them. Save up to £150 a year on your heating bills.
Get smart →Tell us what's happening. If it's an emergency we'll get there today. If it's a new boiler, we'll book a free survey.
No "sorry mate, I'll have to go back to the office." You get a fixed written quote on the day, by email.
We won't chase you. Quote sits in your inbox. When you're ready we'll book a slot that suits you.
Installs in a day wherever possible. We clean up, test everything, show you how it works, and leave you with the warranty in writing.
★★★★★"Boiler packed up on a Saturday morning with a four year old in the house. Dave was round in an hour, back up and running by lunchtime. Fair price, proper decent bloke. Saved our weekend."
★★★★★"We'd had three quotes for a new combi — Marshfield was neither the cheapest nor the dearest but you could tell straight away they knew their stuff. Fitted beautifully, left the place spotless, and came back two weeks later to check in."
★★★★★"Honest, punctual, tidy, and the paperwork was in my inbox before he'd even left the drive. I've found my heating engineer for life."
Pop your details in, tell us what's up, and we'll be back to you the same day. No robots, no call centres — you'll be speaking to Dave, Sarah, or one of the lads.